MAGIC CITY BOTTLE & SUPPLY COMPANY AND GREAT AMERICAN INDEMNITY COMPANY, PETITIONERS,

v.

GEORGE ROBINSON AND THE FLORIDA INDUSTRIAL COMMISSION, RESPONDENTS

DREW, Justice.

This cause is before the Court on cer-tiorari to review the order of the Florida Industrial Commission affirming the order of the deputy commissioner awarding the administratrix of the deceased employee permanent partial disability benefits amounting to 35% of the left leg.

The determining question is the legal sufficiency of the evidence to support the findings of the deputy commissioner.

Claimant was injured during the course of his employment when a piece of machinery struck his left leg breaking two bones near the ankle joint. He received temporary total disability compensation until October 18, 1957, at which time he was discharged by the treating physician as having reached maximum recovery with a 5% permanent partial disability of the left leg. A claim was later filed by the claimant demanding further compensation benefits.

At the final hearing before the deputy commissioner five witnesses testified. These witnesses were the claimant, his wife, Dr. Manson, Mr. Maby, who was the *242carrier’s representative, and Mr. DuBray, who was the investigator for the carrier. The claimant had also been examined by Dr. Claude Holmes hut this doctor was not called to testify at the hearing. The record indicates that Dr. Holmes, as well as Dr. Manson, the treating physician, assigned a permanent partial disability rating of 5% of the left leg.

Because the deputy commissioner’s order under review is of such a nature in the instant case as would make pertinent portions material to the discussion which follows, we quote verbatim paragraphs 5, 6 and 7 thereof in the footnote.1 The subsequent demise of the claimant was caused by other causes than those in which we are interested here.

Petitioner argues there is a lack of competent substantial evidence in the record to support the deputy commissioner’s finding of 35% loss of use of the left leg, and that the award was contrary to the intent of the law. With neither contention can we agree.

Deputy commissioners determine all the issues in all contested workmen’s compensation cases.2 The issue in the instant case was the exact degree of disability under F.S. § 440.15(3) (s), F.S.A.:

“(s) Partial loss or partial loss of use: Compensation for permanent partial loss or loss of use of a member may be for proportionate loss or loss of use of the member.”

Section 440.25(3) (c), Florida Statutes, F. S.A., requires a deputy commissioner to include in his order a statement of the findings of fact and other matters pertinent to the questions at issue. When these findings are supported by competent substantial evidence of an adequate nature, the order of the deputy commissioner will not be disturbed.3 On the other hand, if the findings of the deputy commissioner

*243do not show that he has considered all of the pertinent evidence presented before him, or that the findings are ■ inadequate or unsupported by evidence of a competent substantial nature, the order will not be allowed to stand. The order should show the deputy commissioner has considered all the evidence even though he has not recited it in detail.4

This Court has held on many occasions that the opinions of medical experts are not in and of themselves conclusive in matters of this kind,5 and in some cases the deputy commissioner may disregard the opinion of the expert and give greater weight to the lay testimony of demonstrative evidence presented to him. Larson has gone so far as to indicate that it is necessary to “dispel the misconception that valid awards can stand only if accompanied by a definite medical diagnosis.”6 Moreover, Larson further states “if the circumstances themselves are persuasive enough, a conclusion supported by no medical testimony may stand in defiance of medical testimony to the contrary.”7 In arriving at this rule, two underlying reasons may be discerned: the first is that lay testimony, including that of the claimant himself, is of probative value in establishing such simple matters as the existence and location of pain, the sequence of events leading to the compensable condition, and the actual ability or inability of the claimant to perform his work. Secondly, industrial commissions generally become expert in analyzing certain uncomplicated kinds of medical facts, particularly those bearing on industrial causation, disability, malingering and the like.8

There is some intimation that the petitioner considers that because the injury was a scheduled one, the legislature did not historically have in mind the economic factors involved when a permanent partial disability was to arise under this section. Nothing could be less accurate. The underlying principle of compensation law — all compensation law — is that benefits relate to loss of earning capacity and not to physical injury as such.9 In scheduled benefits the basic theory remains the same; the only difference is that the effect on earning capacity is a conclusively presumed one, based on observed probabilities in many similar cases, instead of a specifically proved one, based on the individual’s actual wage-loss experience. Larson indicates the effect must necessarily be a presumed one, since it would be obviously unfair to appraise the impact of a permanent injury on earning capacity by looking at claimant’s earning record for some relatively short period preceding the hearing. To avoid this impossible administrative task, the apparently cold blooded system of putting average price tags on arms, legs, eyes and fingers has been devised.10

*244It is the responsibility of the deputy commissioner to evaluate all the testimony. In the evalulation process he may, if it appears appropriate, give greater weight to lay testimony — including that of the claimant — or physical evidence presented than to expert medical evidence. This is especially true in those cases where the depuLy commissioner has the opportunity to see and examine the claimant as was done in this case. We find from this record that the deputy commissioner considered the medical evidence, the lay testimony and the physical evidence and correctly arrived at the conclusion he did.

Certiorari denied.

THOMAS, C. J., and TERRELL, ROBERTS and HOBSON, JJ., concur.