Hull, J.
The dispositive issue in this appeal is whether an employer may be required to pay specific indemnity workers’ compensation benefits to an employee, pursuant to General Statutes § 31-349,1 for a physical impairment caused by the combined effect of a compensable injury sustained during the course of employment by the employer and prior noncompensable injuries. The workers’ compensation commissioner for the second district (commissioner) determined that [11]*11the named defendant, Dow Chemical Company, was so liable and accordingly ordered the defendant insurer, Aetna Casualty and Surety Company,2 to pay the plaintiff, Peter Levanti, an award of compensation benefits for a 15 percent back impairment. The compensation review division (review division) affirmed. The defendants appealed to the Appellate Court and we thereafter transferred the appeal to this court pursuant to Practice Book § 4023. We affirm.
The relevant facts are undisputed. In 1954 and in 1962, the plaintiff sustained injuries to his back during the course of his employment in the receiving department of Dow Chemical. Because our Workers’ Compensation Act did not provide specific benefits for back impairment until 1967; see Public Acts 1967, No. 842, § 15, which amended General Statutes § 31-308 to provide specific benefits for back impairment; the plaintiff did not receive specific benefits for the injuries sustained in 1954 and 1962. Thereafter, the plaintiff was promoted to a position in Dow Chemical’s traffic department that required minimal physical labor. In May, 1985, the plaintiff was returned to his previous position in the receiving department and on June 19, 1985, he sustained a third injury to his back during the course of his employment at Dow Chemical.3
Following the third injury, the plaintiff received workers’ compensation benefits for total incapacity4 [12]*12from Dow Chemical pursuant to a voluntary agreement that had been approved by the commissioner. After his back injury had reached maximum medical improvement, the plaintiff sought a specific award of workers’ compensation benefits for permanent partial impairment of his back.5 The defendants contested liability for the entire impairment, claiming that they were not liable for that portion of the impairment attributable to the earlier back injuries, since our Workers’ Compensation Act did not provide specific indemnity benefits for back impairment either in 1954 or in 1962. In a finding and award, the commissioner determined that the plaintiff “ha[d] suffered a 15% permanent partial disability of the back as a result of the injury of June 19, 1985 which ha[d] been superimposed upon previous injuries or condition, the sum total of which ha[d] contrived to make the [plaintiff’s] condition materially and substantially worse than had he suffered the injury of June 19, 1985 by itself alone” and that, therefore, under § 31-349, Dow Chemical was “liable for the full amount of the 15% permanent partial disability to the back.” Accordingly, the commissioner ordered Aetna to pay the plaintiff seventy-eight weeks of compensation benefits. The defendants renewed their claim in the review division which affirmed the commissioner’s finding and award.
[13]*13The defendants claim that the commissioner’s finding and award are unsupported by the evidence. This claim has two subparts. First, the defendants argue that because the evidence before the commissioner pertained solely to the plaintiff’s physical impairment rather than to impairment of his earning capacity, the evidence was insufficient to support a finding that following the injury in 1985, the plaintiff had a “disability” within the meaning of § 31-349. The defendants next argue that the evidence was insufficient to sustain the commissioner’s finding that the plaintiffs overall disability following his most recent injury was “materially and substantially worse” as a consequence of his previous injuries. We do not agree.
An award of workers’ compensation benefits for permanent partial impairment of one’s back is a specific indemnity award. See General Statutes § 31-308 (b); J. Asselin, Connecticut Workers’ Compensation Practice Manual (1985) pp. 151-54. “Specific benefits are benefits for the loss or loss of the use of specific body parts. See Everett v. Ingraham, 150 Conn. 153, 155, 186 A.2d 798 (1962).” Morgan v. East Haven, 208 Conn. 576, 584, 546 A.2d 243 (1988); see also Panico v. Sperry Engineering Co., 113 Conn. 707, 710, 156 A. 802 (1931). “ ‘These [specific] benefits . . . are not paid as compensation for loss of earning power but to compensate the injured employee for the incapacity through life because of the loss or loss of use of the body member in question.’ J. Asselin, supra, p. 151.” Morgan v. East Haven, supra. Thus, “[compensation in such cases is not dependent upon actual incapacity in whole or in part. Franko v. Schollhorn Co., 93 Conn. 13, 104 Atl. 485 [1918].” Dombrozzi v. Gross & Co., 112 Conn. 627, 629, 153 A. 780 (1931); see also J. Asselin, supra, pp. 151-54. In fact, “[p]ermanent partial schedule awards are based on medical condition after maximum improvement has been reached and ignore wage loss [14]*14entirely.” 2 A. Larson, Workmen’s Compensation Law § 57.13, p. 10-41. Nonetheless, “[a] limited schedule is not inconsistent with the earnings-impairment principle [of workers’ compensation law], provided that the items included are such that the conclusive presumption of probable actual wage loss is realistic and not fictitious. In addition, the loss must be obvious enough so that the reason for indulging the presumption-administrative convenience and prevention of litigation—is also realistic.” 2 A. Larson, supra, § 57.14 (a), p. 10-49.
In enacting the schedule of benefits set forth in General Statutes § 31-308 (b),6 our legislature must have [15]*15presumed that the losses therein affected earning capacity, because any other construction would suggest that the section was intended to provide compensation solely for the body part itself, comparable to a tort recovery. This construction would be inconsistent with our Workers’ Compensation Act. “[Wjorkers’ compensation ‘established almost a complete substitute for the common law of torts . . .’” since “the‘purpose of our Act ... is to give to the employee . . . compensation for the loss of wages accruing from the employee’s injury.’ Bassett v. Stratford Lumber Co., 105 Conn. 297, 303, 135 A. 574 (1926).” Perille v. Raybestos-Manhattan-Europe, Inc., 196 Conn. 529, 540, 494 A.2d 555 (1985).
Furthermore, in remarking on the defendants’ apparent confusion between general incapacity benefits and specific benefits, the review division implicitly concluded that an award of specific benefits does not require a showing of impairment of earning capacity because the probability of wage loss is presumed. This interpretation of the review division “ ‘warrants respect as the considered judgment of the govern[16]*16mental agency vested with primary authority for enforcing our workers’ compensation statutes.’
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Hull, J.
The dispositive issue in this appeal is whether an employer may be required to pay specific indemnity workers’ compensation benefits to an employee, pursuant to General Statutes § 31-349,1 for a physical impairment caused by the combined effect of a compensable injury sustained during the course of employment by the employer and prior noncompensable injuries. The workers’ compensation commissioner for the second district (commissioner) determined that [11]*11the named defendant, Dow Chemical Company, was so liable and accordingly ordered the defendant insurer, Aetna Casualty and Surety Company,2 to pay the plaintiff, Peter Levanti, an award of compensation benefits for a 15 percent back impairment. The compensation review division (review division) affirmed. The defendants appealed to the Appellate Court and we thereafter transferred the appeal to this court pursuant to Practice Book § 4023. We affirm.
The relevant facts are undisputed. In 1954 and in 1962, the plaintiff sustained injuries to his back during the course of his employment in the receiving department of Dow Chemical. Because our Workers’ Compensation Act did not provide specific benefits for back impairment until 1967; see Public Acts 1967, No. 842, § 15, which amended General Statutes § 31-308 to provide specific benefits for back impairment; the plaintiff did not receive specific benefits for the injuries sustained in 1954 and 1962. Thereafter, the plaintiff was promoted to a position in Dow Chemical’s traffic department that required minimal physical labor. In May, 1985, the plaintiff was returned to his previous position in the receiving department and on June 19, 1985, he sustained a third injury to his back during the course of his employment at Dow Chemical.3
Following the third injury, the plaintiff received workers’ compensation benefits for total incapacity4 [12]*12from Dow Chemical pursuant to a voluntary agreement that had been approved by the commissioner. After his back injury had reached maximum medical improvement, the plaintiff sought a specific award of workers’ compensation benefits for permanent partial impairment of his back.5 The defendants contested liability for the entire impairment, claiming that they were not liable for that portion of the impairment attributable to the earlier back injuries, since our Workers’ Compensation Act did not provide specific indemnity benefits for back impairment either in 1954 or in 1962. In a finding and award, the commissioner determined that the plaintiff “ha[d] suffered a 15% permanent partial disability of the back as a result of the injury of June 19, 1985 which ha[d] been superimposed upon previous injuries or condition, the sum total of which ha[d] contrived to make the [plaintiff’s] condition materially and substantially worse than had he suffered the injury of June 19, 1985 by itself alone” and that, therefore, under § 31-349, Dow Chemical was “liable for the full amount of the 15% permanent partial disability to the back.” Accordingly, the commissioner ordered Aetna to pay the plaintiff seventy-eight weeks of compensation benefits. The defendants renewed their claim in the review division which affirmed the commissioner’s finding and award.
[13]*13The defendants claim that the commissioner’s finding and award are unsupported by the evidence. This claim has two subparts. First, the defendants argue that because the evidence before the commissioner pertained solely to the plaintiff’s physical impairment rather than to impairment of his earning capacity, the evidence was insufficient to support a finding that following the injury in 1985, the plaintiff had a “disability” within the meaning of § 31-349. The defendants next argue that the evidence was insufficient to sustain the commissioner’s finding that the plaintiffs overall disability following his most recent injury was “materially and substantially worse” as a consequence of his previous injuries. We do not agree.
An award of workers’ compensation benefits for permanent partial impairment of one’s back is a specific indemnity award. See General Statutes § 31-308 (b); J. Asselin, Connecticut Workers’ Compensation Practice Manual (1985) pp. 151-54. “Specific benefits are benefits for the loss or loss of the use of specific body parts. See Everett v. Ingraham, 150 Conn. 153, 155, 186 A.2d 798 (1962).” Morgan v. East Haven, 208 Conn. 576, 584, 546 A.2d 243 (1988); see also Panico v. Sperry Engineering Co., 113 Conn. 707, 710, 156 A. 802 (1931). “ ‘These [specific] benefits . . . are not paid as compensation for loss of earning power but to compensate the injured employee for the incapacity through life because of the loss or loss of use of the body member in question.’ J. Asselin, supra, p. 151.” Morgan v. East Haven, supra. Thus, “[compensation in such cases is not dependent upon actual incapacity in whole or in part. Franko v. Schollhorn Co., 93 Conn. 13, 104 Atl. 485 [1918].” Dombrozzi v. Gross & Co., 112 Conn. 627, 629, 153 A. 780 (1931); see also J. Asselin, supra, pp. 151-54. In fact, “[p]ermanent partial schedule awards are based on medical condition after maximum improvement has been reached and ignore wage loss [14]*14entirely.” 2 A. Larson, Workmen’s Compensation Law § 57.13, p. 10-41. Nonetheless, “[a] limited schedule is not inconsistent with the earnings-impairment principle [of workers’ compensation law], provided that the items included are such that the conclusive presumption of probable actual wage loss is realistic and not fictitious. In addition, the loss must be obvious enough so that the reason for indulging the presumption-administrative convenience and prevention of litigation—is also realistic.” 2 A. Larson, supra, § 57.14 (a), p. 10-49.
In enacting the schedule of benefits set forth in General Statutes § 31-308 (b),6 our legislature must have [15]*15presumed that the losses therein affected earning capacity, because any other construction would suggest that the section was intended to provide compensation solely for the body part itself, comparable to a tort recovery. This construction would be inconsistent with our Workers’ Compensation Act. “[Wjorkers’ compensation ‘established almost a complete substitute for the common law of torts . . .’” since “the‘purpose of our Act ... is to give to the employee . . . compensation for the loss of wages accruing from the employee’s injury.’ Bassett v. Stratford Lumber Co., 105 Conn. 297, 303, 135 A. 574 (1926).” Perille v. Raybestos-Manhattan-Europe, Inc., 196 Conn. 529, 540, 494 A.2d 555 (1985).
Furthermore, in remarking on the defendants’ apparent confusion between general incapacity benefits and specific benefits, the review division implicitly concluded that an award of specific benefits does not require a showing of impairment of earning capacity because the probability of wage loss is presumed. This interpretation of the review division “ ‘warrants respect as the considered judgment of the govern[16]*16mental agency vested with primary authority for enforcing our workers’ compensation statutes.’ Felia v. Westport, [214 Conn. 181, 188, 571 A.2d 89 (1990)], citing Texaco Refining & Marketing Co. v. Commissioner, 202 Conn. 583, 599, 522 A.2d 771 (1987); New Haven v. United Illuminating Co., 168 Conn. 478, 493, 362 A.2d 785 (1975).” Ancona v. Norwalk, 217 Conn. 50, 56, 584 A.2d 454 (1991).
The defendants have failed to show that evidence of loss or loss of use of a body part compensable under § 31-308 (b) is insufficient to sustain a finding of disability under our Workers’ Compensation Act. We conclude, therefore, that the evidence of the plaintiffs back impairment was sufficient to sustain the commissioner’s finding that the plaintiff had a disability within the meaning of § 31-349.
The defendants’ second assertion is that even if the evidence supported a finding of disability, it was inadequate to sustain the commissioner’s finding that as a result of the earlier injuries, the plaintiff’s overall disability following'the third injury was “materially and substantially worse than had he suffered the injury of June 19, 1985 by itself alone.” See General Statutes § 31-349. The commissioner determined that each of the three injuries had caused a 5 percent impairment of the plaintiff’s back for an overall 15 percent back impairment. The commissioner then concluded that because the earlier injuries together had caused a 10 percent impairment, two-thirds of the overall disability, the disability after the third injury was materially and substantially worse than it would have been had the earlier injuries not occurred. According to the defendants, because the commissioner merely compared the impairment percentages and did not find that the injuries had “combined and merged,” there was an insufficient basis on which to determine that the [17]*17resultant disability was materially and substantially greater. We do not agree.
“It has always been accepted without question that the situation to which the Second Injury Fund applies consists of a prior noncompensable injury followed by and combining with a subsequent compensable injury.” (Emphasis in original.) 2 A. Larson, supra, § 59.32 (g), p.10-488. Contrary to the defendants’ assertion, the prior impairment need not combine with the compensable injury in any special way, but must merely add something to the overall disability before the fund can become liable. 2 A. Larson, supra, p. 10-472. Thus, evidence that the preexisting impairment has materially increased the claimant’s overall disability is sufficient to warrant application of § 31-349. See Lovett v. Atlas Truck Leasing, 171 Conn. 577, 583, 370 A.2d 1061 (1976).
In this case, the commissioner determined that the prior injuries had caused a 10 percent back impairment while the third injury had caused a 5 percent back impairment for a total of 15 percent. The defendants do not challenge this finding. Because the earlier injuries increased the extent of the resultant disability by 200 percent, we conclude that the commissioner reasonably determined that the plaintiff’s overall disability was materially and substantially greater as a result of the earlier injuries within the meaning of § 31-349.
The defendants claim that applying § 31-349 in cases such as this will lead to irrational results by imposing liability on employers for consequences a mere fraction of which are attributable to their employment. This claim is without merit.
Section 31-349 does not create liability. To the contrary, it is an apportionment statute that limits the liability of employers previously imposed. Plesz v. United Technologies Corporation, 174 Conn. 181, 186, 384 A.2d [18]*18363 (1978); Lovett v. Atlas Truck Leasing, supra, 582-83. According to the general rule of workers’ compensation law, if an employee was injured during the course of his employment, an employer was liable to provide compensation for the full extent of the employee’s disability, regardless of whether the disability was due, in part, to a preexisting condition or impairment. Plesz v. United Technologies Corporation, supra, 185; Lovett v. Atlas Truck Leasing, supra, 581-82.7 Thus, “employers were often held liable for the full consequences of work-related accidents suffered by their employees, even though those consequences were aggravated by preexisting disabilities.” Jacques v. H.O. Penn Machinery Co., 166 Conn. 352, 356, 349 A.2d 847 (1974). The legislature, cognizant of the hardships posed by the general rule, including discrimination against handicapped workers and employer liability for consequences not attributable to their employment; Plesz v. United Technologies Corporation, supra; Lovett v. Atlas Truck Leasing, supra, 582; enacted § 31-349 to limit the employer’s liability to 104 weeks of compensation in situations where a claimant’s disability following a work-related injury is materially and substantially greater as a result of an earlier injury or previous condition.
In this case, because the award of compensation benefits was less than 104 weeks, the defendants had to pay the entire award. Nevertheless, if the resultant disability had warranted an award in excess of that amount, § 31-349 would have served to limit the defendants’ liability. We conclude, therefore, that application of § 31-349 in cases such as this promotes rational results.8
[19]*19The judgment is affirmed.
In this opinion the other justices concurred.