JON P. WILCOX, J.
¶1. This case is before the court on petitions for review filed by Mrs. Jimetta Clay-pool, Mr. Marvin Claypool, and Ms. Jennifer Claypool (collectively the "Claypools"), and Dr. Mark Levin, M.D. The petitioners seek review of a published court of appeals decision, Claypool v. Levin, 195 Wis. 2d 535, 536 N.W.2d 206 (Ct. App. 1995), that reversed a circuit court judgment. The Circuit Court for Milwaukee County, William D. Gardner, Judge, granted summary judgment to Dr. Levin for the Claypools' medical malpractice claim against him on the grounds that the statute of limitations had expired. The court of appeals reversed the decision of the circuit court and remanded for further proceedings. We reverse the decision of the court of appeals.
¶ 2. The issue on review is when, pursuant to the medical malpractice statute of limitations, Wis. Stat. § 893.55(1)(b) (1993-94),1 Mrs. Claypool discovered or [287]*287in the exercise of reasonable diligence should have discovered her injury. We hold that for purposes of Wis. Stat. § 893.55(1)(b) Mrs. Claypool did discover or in the exercise of reasonable diligence she should have discovered her injury at some point in March or early April of 1989. We also hold that once an injury is discovered it cannot be "undiscovered." Thus, the Claypools' claims against Dr. Levin are barred by the statute of limitations.
¶ 3. The material facts necessary for our determination are undisputed. On March 6, 1989, Mrs. Claypool was hospitalized on an emergency basis at Columbia Hospital. At the time she was hospitalized, she was very ill and her symptoms included vision problems. Between March 6 and April 6, 1989, she was treated by the defendant, Dr. Levin, an ophthalmolo[288]*288gist. While Mrs. Claypool was at the hospital, Dr. Levin treated her eyes with antibiotics and an intravitreous injection. During this period, her vision deteriorated until she became permanently blind on March 8, 1989.
¶ 4. On April 10, 1989, four days after her release from the hospital, Mrs. Claypool and her husband retained Attorney Russell Goldstein to investigate whether her blindness was attributable to negligence of the health care providers including Dr. Levin. Gold-stein had the Claypools sign a retainer agreement and medical authorizations. Goldstein subsequently obtained several pages of Mrs. Claypool's hospital records, but did not have them reviewed by an expert.
¶ 5. Although Goldstein failed to contact the Claypools, Mr. Claypool called him regarding the status of the case on two or three occasions between April 10, 1989, and July of 1992. On each occasion Goldstein told Mr. Claypool that he was "checking out" the case. Sometime prior to 1992, while Mr. Claypool was on jury duty at the Milwaukee County Courthouse, he encountered Goldstein and inquired about the status of the case. Goldstein advised Mr. Claypool that the doctor with whom he had consulted had concluded that there was no cause of action. Mr. Claypool subsequently relayed this information to his wife.
¶ 6. Sometime more than three years after Mrs. Claypool was treated by Dr. Levin, Mr. Claypool was asked by a co-worker about his wife's condition. When Mr. Claypool responded that she had lost her vision, the co-worker recommended that the Claypools contact the Warshafsky law firm. In the summer of 1993, Mrs. Claypool contacted attorneys from the Warshafsky law firm who subsequently advised her that she did have a viable medical malpractice claim against Dr. Levin.
[289]*289¶ 7. Four and one-half years after Dr. Levin's last treatment of Mrs. Claypool, on October 14, 1993, the Claypools, now represented by the Warshafsky law firm, commenced this lawsuit alleging that both Dr. Levin and Goldstein were negligent. The plaintiffs sought recovery from Dr. Levin if the statute of limitations had not expired, or, in the alternative, from Goldstein if the statute of limitations had expired.
¶ 8. Dr. Levin subsequently filed a motion for summary judgment asserting that the Claypools' claims were time barred under Wis. Stat. § 893.55(1). Goldstein opposed the motion asserting that any failure on his part to exercise due diligence should not be imputed to the Claypools. In granting Dr. Levin's motion for summary judgment, the trial court concluded:
The only issue before this Court involves the discovery rule. It is Goldstein's position that discovery did not occur until the attorneys subsequently retained by the Claypools advised the Claypools that they had a viable claim for medical negligence. This position flies in the face of reason, common sense and the law. This court concludes that the undisputed facts can lead to but one reasonable inference, that is, in the exercise of reasonable diligence plaintiffs should have discovered the probable cause of the injury within a reasonably short period of time after the injury. The injury was immediately known and the potentially responsible health care providers were known almost immediately after the injury. Counsel was retained within weeks of the injury to conduct an investigation regarding the potential cause or causes of the injury.
[290]*290¶ 9. Goldstein appealed and the court of appeals reversed. In addressing the conclusion of the circuit court, the court of appeals stated:
Thus, the trial court's conclusion that "the only reasonable inference" is that the Claypools "possessed sufficient information within a relatively short span of time from the injury to form an objective belief that Dr. Levin's treatment was the cause of the injury" was an accurate expression of the Claypools' understanding at the point at which they presented their case to Goldstein. That, however, does not logically end the analysis because the Claypools' "discovery" as a matter of law was not necessarily locked in time by their initial belief given the subsequent events. To conclude otherwise would be to ignore the "ordinary person" standard of Borello and require the claimant "to take extraordinary steps to secure a full medical analysis" beyond whatever counsel has obtained.
Claypool, 195 Wis. 2d at 551-52, citing Borello v. U.S. Oil Co., 130 Wis. 2d 397, 414, 388 N.W.2d 140 (1986). The court of appeals went on to hold that although Dr. Levin was not entitled to summary judgment, there was not sufficient evidence to conclude that, as a matter of law, the Claypools did not discover their cause of action until they received advice from the Warshafsky law firm.
¶ 10. This court must now determine whether it was appropriate for the trial court to grant Dr. Levin's motion for summary judgment. We review a grant of summary judgment by applying the same standards used by the circuit court. Verdoljak v. Mosinee Paper Corp., 200 Wis. 2d 624, 630, 547 N.W.2d 602 (1996). These standards are set forth in Wis. Stat.
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JON P. WILCOX, J.
¶1. This case is before the court on petitions for review filed by Mrs. Jimetta Clay-pool, Mr. Marvin Claypool, and Ms. Jennifer Claypool (collectively the "Claypools"), and Dr. Mark Levin, M.D. The petitioners seek review of a published court of appeals decision, Claypool v. Levin, 195 Wis. 2d 535, 536 N.W.2d 206 (Ct. App. 1995), that reversed a circuit court judgment. The Circuit Court for Milwaukee County, William D. Gardner, Judge, granted summary judgment to Dr. Levin for the Claypools' medical malpractice claim against him on the grounds that the statute of limitations had expired. The court of appeals reversed the decision of the circuit court and remanded for further proceedings. We reverse the decision of the court of appeals.
¶ 2. The issue on review is when, pursuant to the medical malpractice statute of limitations, Wis. Stat. § 893.55(1)(b) (1993-94),1 Mrs. Claypool discovered or [287]*287in the exercise of reasonable diligence should have discovered her injury. We hold that for purposes of Wis. Stat. § 893.55(1)(b) Mrs. Claypool did discover or in the exercise of reasonable diligence she should have discovered her injury at some point in March or early April of 1989. We also hold that once an injury is discovered it cannot be "undiscovered." Thus, the Claypools' claims against Dr. Levin are barred by the statute of limitations.
¶ 3. The material facts necessary for our determination are undisputed. On March 6, 1989, Mrs. Claypool was hospitalized on an emergency basis at Columbia Hospital. At the time she was hospitalized, she was very ill and her symptoms included vision problems. Between March 6 and April 6, 1989, she was treated by the defendant, Dr. Levin, an ophthalmolo[288]*288gist. While Mrs. Claypool was at the hospital, Dr. Levin treated her eyes with antibiotics and an intravitreous injection. During this period, her vision deteriorated until she became permanently blind on March 8, 1989.
¶ 4. On April 10, 1989, four days after her release from the hospital, Mrs. Claypool and her husband retained Attorney Russell Goldstein to investigate whether her blindness was attributable to negligence of the health care providers including Dr. Levin. Gold-stein had the Claypools sign a retainer agreement and medical authorizations. Goldstein subsequently obtained several pages of Mrs. Claypool's hospital records, but did not have them reviewed by an expert.
¶ 5. Although Goldstein failed to contact the Claypools, Mr. Claypool called him regarding the status of the case on two or three occasions between April 10, 1989, and July of 1992. On each occasion Goldstein told Mr. Claypool that he was "checking out" the case. Sometime prior to 1992, while Mr. Claypool was on jury duty at the Milwaukee County Courthouse, he encountered Goldstein and inquired about the status of the case. Goldstein advised Mr. Claypool that the doctor with whom he had consulted had concluded that there was no cause of action. Mr. Claypool subsequently relayed this information to his wife.
¶ 6. Sometime more than three years after Mrs. Claypool was treated by Dr. Levin, Mr. Claypool was asked by a co-worker about his wife's condition. When Mr. Claypool responded that she had lost her vision, the co-worker recommended that the Claypools contact the Warshafsky law firm. In the summer of 1993, Mrs. Claypool contacted attorneys from the Warshafsky law firm who subsequently advised her that she did have a viable medical malpractice claim against Dr. Levin.
[289]*289¶ 7. Four and one-half years after Dr. Levin's last treatment of Mrs. Claypool, on October 14, 1993, the Claypools, now represented by the Warshafsky law firm, commenced this lawsuit alleging that both Dr. Levin and Goldstein were negligent. The plaintiffs sought recovery from Dr. Levin if the statute of limitations had not expired, or, in the alternative, from Goldstein if the statute of limitations had expired.
¶ 8. Dr. Levin subsequently filed a motion for summary judgment asserting that the Claypools' claims were time barred under Wis. Stat. § 893.55(1). Goldstein opposed the motion asserting that any failure on his part to exercise due diligence should not be imputed to the Claypools. In granting Dr. Levin's motion for summary judgment, the trial court concluded:
The only issue before this Court involves the discovery rule. It is Goldstein's position that discovery did not occur until the attorneys subsequently retained by the Claypools advised the Claypools that they had a viable claim for medical negligence. This position flies in the face of reason, common sense and the law. This court concludes that the undisputed facts can lead to but one reasonable inference, that is, in the exercise of reasonable diligence plaintiffs should have discovered the probable cause of the injury within a reasonably short period of time after the injury. The injury was immediately known and the potentially responsible health care providers were known almost immediately after the injury. Counsel was retained within weeks of the injury to conduct an investigation regarding the potential cause or causes of the injury.
[290]*290¶ 9. Goldstein appealed and the court of appeals reversed. In addressing the conclusion of the circuit court, the court of appeals stated:
Thus, the trial court's conclusion that "the only reasonable inference" is that the Claypools "possessed sufficient information within a relatively short span of time from the injury to form an objective belief that Dr. Levin's treatment was the cause of the injury" was an accurate expression of the Claypools' understanding at the point at which they presented their case to Goldstein. That, however, does not logically end the analysis because the Claypools' "discovery" as a matter of law was not necessarily locked in time by their initial belief given the subsequent events. To conclude otherwise would be to ignore the "ordinary person" standard of Borello and require the claimant "to take extraordinary steps to secure a full medical analysis" beyond whatever counsel has obtained.
Claypool, 195 Wis. 2d at 551-52, citing Borello v. U.S. Oil Co., 130 Wis. 2d 397, 414, 388 N.W.2d 140 (1986). The court of appeals went on to hold that although Dr. Levin was not entitled to summary judgment, there was not sufficient evidence to conclude that, as a matter of law, the Claypools did not discover their cause of action until they received advice from the Warshafsky law firm.
¶ 10. This court must now determine whether it was appropriate for the trial court to grant Dr. Levin's motion for summary judgment. We review a grant of summary judgment by applying the same standards used by the circuit court. Verdoljak v. Mosinee Paper Corp., 200 Wis. 2d 624, 630, 547 N.W.2d 602 (1996). These standards are set forth in Wis. Stat. § 802.08(2). [291]*291Summary judgment is appropriate where there is no genuine issue of material fact and the moving party is entitled to judgment as a matter of law. Linville v. City of Janesville, 184 Wis. 2d 705, 714, 516 N.W.2d 427 (1994). Whether Dr. Levin is entitled to summary judgment depends upon whether the Claypools' claims against Dr. Levin are barred by the statute of limitations.
¶ 11. The relevant statute of limitations, Wis. Stat. § 893.55(1), provides that claims against health care providers must be brought within three years from the date of injury or within one year from the date that the injury was discovered or in the exercise of reasonable diligence the injury should have been discovered. The summons and complaint in this case were filed on October 14, 1993. As Dr. Levin's treatment of Mrs. Claypool occurred in March and April of 1989, the Claypools' claim was not brought within three years of the date of injury. Thus, whether the claims against Dr. Levin are barred by the statute of limitations depends upon whether Mrs. Claypool either discovered or in the exercise of reasonable diligence should have discovered the injury at sometime before October 14, 1992.
¶ 12. We must first determine what constituted discovery for purposes of Wis. Stat. § 893.55(1). In making this determination, we must look both at the language of the statute and at relevant case law. Gold-stein argues that this court's decision in Borello and the definition of the discovery rule detailed in that case control the outcome of the present case. To adequately address this contention, we must consider the history of the discovery rule in Wisconsin.
¶ 13. Prior to 1983, this court consistently declined to adopt the discovery rule on the basis that [292]*292such a change in the law should be enacted by the legislature. See Peterson v. Roloff, 57 Wis. 2d 1, 203 N.W.2d 699 (1973); Olson v. St. Croix Valley Memorial Hospital, 55 Wis. 2d 628, 201 N.W.2d 63 (1972); Holifield v. Secto Industries, Inc., 42 Wis. 2d 750, 168 N.W.2d 177 (1969); McCluskey v. Thranow, 31 Wis. 2d 245, 142 N.W.2d 787 (1966); Reistad v. Manz, 11 Wis. 2d 155, 105 N.W.2d 324 (1960). The facts of McCluskey are representative of those pre-discovery rule cases.
¶ 14. In McCluskey, the defendant doctor performed surgery on the plaintiff on May 1, 1956. McCluskey, 31 Wis. 2d at 248. An x-ray was taken on May 4, 1956, by another doctor who prepared a report for the defendant doctor. Id. This report made no mention of foreign objects in the abdominal area. Id. Additionally, the plaintiff apparently felt no abnormal pain after the operation; however, on June 13, 1962, when the defendant doctor saw for the first time the x~ ray taken on May 4, 1956, it revealed that a hemostat was in the plaintiffs body. Id. The defendant doctor shortly thereafter informed the plaintiff of the situation and on January 6, 1965, the instrument was removed. Id. The plaintiff commenced the action against the defendant doctor on April 28, 1965, alleging, among other things, that the defendant doctor was negligent in failing to remove the hemostat. Id. The applicable statute of limitations was three years. Id. at 249-50. Despite the meritorious claim presented to this court in McCluskey, this court concluded that such a change in the statute of limitations should be made, not by the court, but by the legislature.2 Id. at 250-51.
¶ 15. In 1979, the legislature responded by adopting a discovery rule for medical malpractice [293]*293claims. Wis. Stat. § 893.55(1)(b). It is the interpretation of this statutory discovery rule that is at issue in this case. The statute provides:
(1). . .an action to recover damages for injury.. .shall be commenced within..
(b) One year from the date the injury was discovered or, in the exercise of reasonable diligence should have been discovered, except that an action may not be commenced under this paragraph more than 5 years from the date of the act or omission.
Wis. Stat. § 893.55(1).3 However, this discovery rule did not apply to non-medical malpractice tort claims.
[294]*294¶ 16. Subsequent to the legislature's adoption of Wis. Stat. § 893.55(1), this court recognized a common law discovery rule for those tort cases not already covered by the statutory discovery rule. This common law discovery rule was first recognized by this court in Hansen v. A.H. Robins Inc., 113 Wis. 2d 550, 335 N.W.2d 578 (1983). In Hansen, the plaintiff commenced a suit on June 24, 1981, against the manufacturer of a "Daikon Shield" intrauterine device that was inserted into her uterus on May 28, 1974. Id. at 553. In May of 1978, the plaintiff began to suffer symptoms and sought the advice of a doctor on June 13, 1978. Id. The doctor failed to accurately diagnose the problem. Id. On June 26, 1978, the plaintiff sought the advice of another doctor who correctly diagnosed the problem. Id. at 553. The applicable statute of limitations in Hansen provided that the action had to be brought within three years of the date on which the action had accrued. Id. at 553-54.
¶ 17. The Hansen court recognized that this court had previously held that a cause of action accrues on the date of injury. Id. at 554. The court then noted that "using the date of injury as the benchmark for accrual of claims can yield extremely harsh results." Id. at 556. The court also acknowledged that the legislature had adopted a discovery rule for medical malpractice cases, Wis. Stat. § 893.55, but noted that a general discovery rule did not exist:
[295]*295The legislature has not taken similar ameliorative action for tort claims outside the realm of medical malpractice. We believe the time has come to consider adoption of the discovery rule for such claims.
Id. at 557. The Hansen court also made clear that the discovery rule it was adopting was distinct from the one that the legislature had already adopted in Wis. Stat. § 893.55:
In the interest of justice and fundamental fairness, we adopt the discovery rule for all tort actions other than those already governed by a legislatively created discovery rule. Such tort claims shall accrue on the date the injury is discovered or with reasonable diligence should be discovered, whichever occurs first. All cases holding that tort claims accrue at the time of the negligent act or injury are hereby overruled.
Id. at 560 (emphasis added).
¶ 18. In reaching the decision to adopt a common law discovery rule in Hansen, this court relied heavily on public policy considerations. The Hansen court identified two conflicting public policies associated with the discovery rule: "(1) That of discouraging stale and fraudulent claims, and (2) that of allowing meritorious claimants, who have been as diligent as possible, an opportunity to seek redress for injuries sustained." Id. at 558, quoting Peterson v. Roloff, 57 Wis. 2d 1, 6, 203 N.W.2d 699 (1973). In deciding that the discovery rule did not severely infringe on the public policy of discouraging stale and fraudulent claims, this court stated:
Although the discovery rule will allow actions to be filed more than three years after the date of injury, it will not leave defendants unprotected from stale and fraudulent claims. Under the rule a claim [296]*296accrues when the injury is discovered or reasonably should have been discovered. Therefore, it does not benefit claimants who negligently or purposefully fail to file a timely claim.
Id. at 559. This passage illustrates that the court was attempting to strike a balance between the conflicting public policies rather than completely subordinating the public policy of discouraging stale and fraudulent claims. The court explained the significance of the public policy of allowing meritorious claims as follows:
It is manifestly unjust for the statute of limitations to begin to run before a claimant could reasonably become aware of the injury. Although theoretically a claim is capable of enforcement as soon as the injury occurs, as a practical matter a claim cannot be enforced until the claimant discovers the injury and the accompanying right of action. In some cases the claim will be time barred before the harm is or could be discovered, making it impossible for the injured party to seek redress. Under these circumstances the statute of limitations works to punish victims who are blameless for the delay and to benefit wrongdoers by barring meritorious claims. In short, we conclude that the injustice of barring meritorious claims before the claimant knows of the injury outweighs the threat of stale or fraudulent actions.
Id. From this language it is apparent that the common law discovery rule was intended to introduce practical considerations into the operation of the relevant statutes of limitation.
¶ 19. The application of the Hansen common law discovery rule was further explored by this court in Borello. In that case, the plaintiff had a furnace installed in her home in December of 1977. Borello, 130 [297]*297Wis. 2d at 400. In a December 19, 1977, letter to the furnace company, Mrs. Borello complained of physical symptoms. In describing the letter, the Borello court stated, "the most that can be gleaned from the 1977 letter is that she was not able to attribute her symptoms to the old furnace, the new one, or to any furnace but perhaps instead to some other cause." Id. at 401. During this same period, the plaintiff sought medical advice and was told by various physicians that her ailments were not caused by the furnace. Id. On February 5, 1979, the plaintiff entered the hospital where she was misdiagnosed with a systemic viral infection. Id. at 402. When she returned home from the hospital on February 20, 1979, the flat surfaces of her home were covered with a red dust. Id. On March 12, 1979, the plaintiff consulted with another physician who wrongly determined that her symptoms were not related to the furnace. Id. Finally, on October 30, 1979, a different physician concluded that the furnace was the source of the plaintiffs ailments which were identified as metal fume fever. Id. at 402-03.
¶ 20. On November 25, 1981, the plaintiff commenced an action against the furnace company. Id. The statute of limitations applicable to the plaintiffs claims was the same three-year statute of limitations that the court considered in Hansen. Applying the common law discovery rule adopted in Hansen, this court held that the cause of action did not accrue until she was diagnosed with metal fume fever on October 30, 1979. Id. at 414-15. The Borello court stated:
[T]he statute of limitations did not commence to run against [the plaintiffs] claim until she had a basis for objectively concluding that metal fume fever from a furnace installed by the U.S. Oil Company [298]*298and manufactured by The Williamson Company was probably the cause of her symptoms.. . .the statute began to run when the claimant knew or ought to have known the nature of the disability and its relation to the defendant's conduct.
Id.
¶ 21. Goldstein argues that this case is governed by the holding in Borello. Goldstein further asserts that Mrs. Claypool, like the plaintiff in Borello, did not have an objective basis for concluding that Dr. Levin was responsible for Mrs. Claypool's blindness until she consulted the Warshafsky law firm. However, in presenting this argument, Goldstein fails to consider the importance of Clark v. Erdmann, 161 Wis. 2d 428, 468 N.W.2d 18 (1991), in which this court directly considered the relevance of the Borello holding in determining when discovery occurs pursuant to Wis. Stat. § 893.55U).4
[299]*299¶ 22. In Clark, the plaintiff argued that "under [Borello] no 'discovery' [had taken] place for purposes of sec. 893.55(1)(b), and the statute of limitations did not begin to run, until July 1988, after [the] action was commenced, when she [claimed] first to have received 'objective verification' of her injury and its cause ..." Id. at 444-45. The defendant, Dr. Erdmann, argued that based on Fritz v. McGrath, 146 Wis. 2d 681, 431 N.W.2d 751 (Ct. App. 1988), and Kempfer v. Evers, 133 Wis. 2d 415, 395 N.W.2d 812 (Ct. App. 1986), there was a reasonable likelihood that the plaintiff had an objective belief of the injury and its cause such that plaintiff discovered her injury no later than 1985. Clark, 161 Wis. 2d at 447. This court agreed with Dr. Erdmann:
While Borello is applicable to medical malpractice actions, it should not be read to say, as Clark asserts, that an "objective belief' sufficient to constitute "discovery" requires a plaintiff "officially" be informed by an expert witness of her injury, its cause or the relation between the injury and its cause.
Id. at 448 (emphasis added). Thus, in Clark, this court made clear that the same analysis should be used to determine when discovery occurs under the statutory discovery rule contained in Wis. Stat. § 893.55(1)(b) [300]*300and the common law discovery rule established in Hansen. However, the Clark court also clarified how Borello should be read and thus how such a determination should be made.
¶ 23. This court stated in Clark that discovery occurs when the "plaintiff has information that would constitute the basis for an objective belief of her injury and its cause. . . ." Id. In other words, discovery occurs when a potential plaintiff has information that would give a reasonable person notice of her injury and its cause. This does not mean that if there is more than one reasonable cause of the injury that discovery cannot occur. This standard also does not require that the potential plaintiff know with certainty the cause of her injury.
¶ 24. The Clark decision also suggests that the question of when Mrs. Claypool's discovery should have occurred does not hinge on the actions of her attorney in evaluating the case:
We thus approve of the language of the court of appeals in Fritz and Kempfer. While an unsubstantiated lay belief is not sufficient for discovery to occur, the existence of a reasonable likelihood for an objective belief as to an injury and its cause does not require any sort of formalistic approach as is suggested by Clark. If a plaintiff has information that would constitute the basis for an objective belief of her injury and its cause, she has discovered her injury and its cause. It does not matter whether her objective belief resulted from information "officially" obtained from an expert witness. Nor, as Fritz and Kempfer suggest, does it necessarily always matter whether the objective belief resulted at all from information obtained from any "expert" person.
[301]*301Id. (emphasis added). The language of Kempfer approved of in Clark further indicates that a valid legal opinion is not necessary for discovery to occur:
Accrual is based on the person's knowledge that he or she has been injured. [Hansen, 113 Wis. 2d at 539], It is true that when the source of injury is unclear and the injured person has exercised reasonable diligence, the time of accrual may be extended until a causal connection can be established. [citing Borello, 130 Wis. 2d at 411]. However, neither Hansen nor Borello provide any authority for the proposition that the cause of action cannot accrue until the injured person is advised of his or her legal rights.
Id. at 447, citing Kempfer, 133 Wis. 2d at 419. Thus, based on Clark and Kempfer, discovery occurs when the potential plaintiff has information that would give a reasonable person notice of her injury and its cause regardless of whether she has been given a misleading legal opinion.
¶ 25. In addition, once a person either discovers the injury or in the exercise of reasonable diligence should have discovered the injury, nothing, including a misleading legal opinion, can cause the injury to become "undiscovered." The court of appeals stated that "the Claypools' 'discovery' as a matter of law was not necessarily locked in time by their initial belief given the subsequent events." Claypool, 195 Wis. 2d at 551. We explicitly reject this conclusion as contrary to the plain language of Wis. Stat. § 893.55(1).
¶ 26. A reading of Wis. Stat. § 893.55(1) proves that once discovery occurs, it is, in fact, locked in time. Sections 893.55(1) and 893.55(1)(a) essentially provide that an action to recover damages for certain types of [302]*302injuries must be commenced within one year from the date the injury was discovered or in the exercise of reasonable diligence should have been discovered. These sections do not provide that this one year period is tolled if the injury is "undiscovered." To hold otherwise ignores the plain meaning of the statute.
¶ 27. In this case, the record does not provide us with sufficient facts to conclude as a matter of law that discovery did occur or in the exercise of reasonable diligence should have occurred on a particular day. Without a more complete record, we are unable to answer certain questions. What was the state of Mrs. Claypool's vision when she entered the hospital? Did Dr. Levin give her a prognosis? Did any other conversations take place between Mrs. Claypool and Dr. Levin? We are able to glean from the record that Mrs. Claypool entered the hospital on March 6, 1989. At the time she entered the hospital she was very ill and had been suffering problems with her vision. She was treated by Dr. Levin from March 7 until April 6 when she was released from the hospital. The treatment included Dr. Levin administering intravitreous injections or shots to Mrs. Claypool's eyes. When she left the hospital, on April 6, she was permanently blind. Just four days after her release from the hospital, on April 10, Mrs. Claypool and her husband retained attorney Goldstein to investigate whether her blindness was attributable to Dr. Levin. We believe these facts are sufficient to establish that Mrs. Claypool discovered or in the exercise of reasonable diligence should have discovered her injury in March or early April of 1989.
¶ 28. At some point in March or early April of 1989 Mrs. Claypool had information sufficient to give a reasonable person notice of her injury and its cause. [303]*303The fact that Goldstein told Mrs. Claypool that she did not have a claim can not defeat the fact that she had such an objective basis for knowledge of her injury and its cause. If she did not in fact discover her injury in March or early April of 1989, then in the exercise of reasonable diligence she should have discovered her injury during that period. Accordingly, Mrs. Claypool did not bring her claim within one year from the date that in the exercise of reasonable diligence the injury should have been discovered or within three years from the date of injury. Thus, her claim is barred by Wis. Stat. § 893.55(1) and Dr. Levin is entitled to summary judgment.
By the Court. — The decision of the court of appeals is reversed.