This appeal raises two questions: (1) Is the Commission’s finding that no Form 28 (b) was ever delivered to or mailed to plaintiff as required by the Commission’s rule XI (5) supported by the evidence? (2) Did the Commission fail to determine in its order whether there is a causal relation between the compen-sable injury of 23 May 1967 and plaintiff’s present condition?
[1] Under G.S. 97-47, a claim for additional compensation is barred, if the request for compensation is not made within twelve months from the date of the last payment, unless the carrier is estopped to plead the lapse of time. Watkins v. Motor Lines, 279 N.C. 132, 181 S.E. 2d 588. Under the Commission’s rule XI (5), promulgated pursuant to statutory authority contained in G.S. 97-80, defendants must execute Form 28(b) and furnish a copy to a claimant with his last compensation check. A failure to do so will estop defendants from pleading the lapse of time in bar of a claim asserted for additional compensation: on the grounds of a change in condition. White v. Boat Corporation, 261 N.C. 495, 135 S.E. 2d 216. The importance of Form 28(b) with respect to starting the running of the statutory period under G.S. 97-47 is that this form serves as explicit *315notice to a claimant that if further benefits are claimed the Commission must be notified in writing within one year from the date of receipt of claimant’s last compensation check.
[2] Defendants do not dispute the fact that a failure to furnish plaintiff with a copy of Form 28(b) would estop them from pleading the limitation period of G.S. 97-47 as a bar to plaintiff’s claim for additional compensation, but as indicated above, they do challenge the Commission’s finding that a copy of Form 28(b) was not in fact furnished plaintiff or mailed to him.
The evidence discloses that a copy of Form 28(b), dated 21 June 1967, was mailed by the carrier to the defendant employer, along with plaintiff’s only compensation check, a copy of Form 21, and a form letter of transmittal. The employer’s bookkeeper wrote plaintiff on 27 June 1967:
“We have a check for you in the amount of $28.80 from National Mutual Insurance Company. There are also papers for you to fill out.
Please come by the office and pick up the check and complete the papers as soon as it’s convenient. The insurance company would like to have these papers as soon as possible in order to file with the Industrial Commission.”
Plaintiff thereafter went by the employer’s office where he signed Form 21 and received from the bookkeeper his compensation check. He denied receiving a copy of Form 28(b) and the bookkeeper was unable to say definitely that she furnished one to him. She did state that she recalled that plaintiff came in, signed the Form 21, and “I gave him the check, and shortly thereafter he left.” In reply to a specific question as to whether she remembered delivering a green form like the form referred to as 28(b), the bookkeeper stated: “I really — I couldn’t swear I did. I’m not familiar with insurance forms. If they had been stapled, I’m sure I did. I’m not that familiar with the forms.” She further testified: “I would not swear I did. If it was attached to the letter, I assume I did — I don’t know whether it was or not. As to being sure if the form was given if attached, all of the forms were not given to him. I suppose he has a copy of what I witnessed. I don’t know if I gave him one of which I witnessed. If there was that many of them I don’t remember if I gave him a copy of Form 28 (b)
*316An inference arises from the bookkeeper’s testimony that she was unfamiliar with Workmen’s Compensation claims and the requirement that certain copies of forms be furnished a claimant. (Actually, she was first employed by defendant employer in June of 1967 — the same month she delivered defendant his check and obtained his signature to Form 21.) Her letter to plaintiff indicated he was to pick up only his check — the only mention of other items concerned papers which were to be filled out and returned to the carrier.
The bookkeeper’s uncertainty as to whether she delivered the required Form 28(b) to plaintiff and her obvious unfamiliarity with the insurance forms and her duties in connection therewith, when coupled with plaintiff’s insistence that he never at any time received a copy of Form 28(b), supports the Commission’s finding that no copy of Form 28 (b) was furnished to plaintiff. Findings of fact by the Industrial Commission are binding on appeal where supported by any competent evidence. Jackson v. Highway Commission, 272 N.C. 697, 158 S.E. 2d 865.
Defendants insist that a second Form 28(b) was prepared on 6 October 1967, and that a copy thereof was mailed directly to plaintiff at his home address by the carrier sometime in October of 1967. It is noted that this would not be in compliance with the Commission’s rule XI (5) which requires defendants to send a copy of the form to a claimant with his last payment of compensation. Moreover, the Commission rejected this contention by finding that no Form 28 (b) was ever furnished to plaintiff or mailed to him. The evidence supports this finding. Plaintiff and his mother testified that no mail of any kind was ever delivered to their address from the defendant carrier. Also, the carrier’s claim supervisor, who brought up the matter of the second Form 28(b), was unable to say definitely that a copy was mailed to plaintiff. He stated, “I don’t know of my own knowledge that the second Form 28 (b) in October was mailed.” The supervisor further stated that his testimony was based purely on what the file showed. There was no testimony that there was any indication in the file that a copy of Form 28(b), dated 6 October 1967, was mailed to plaintiff. Both 28(b) forms contained in the carrier’s file were offered into evidence. The one dated 21 June 1967 indicates a copy was prepared for plaintiff. (“C. C. Jimmy Sides” appears thereon.) No similar notation appears on the form dated 6 October 1967.
*317We turn now to the second question raised by this appeal.
[3] The Commission’s findings relate the history of plaintiff’s eye condition, beginning with the injury on 23 May 1967 which resulted in a diagnosis of herpes ulcer cornea, secondary to the injury. This condition cleared and when plaintiff was examined by his physician on 3 July 1967 the vision in his right eye had improved. No permanent disability was noted at that time, but it was noted that some scarring remained in the central cornea, indicating the dendritic figure had penetrated below the epithelium and had left the scar. Plaintiff was next seen by his physician on 23 April 1969. An examination on this occasion revealed that plaintiff’s vision in the right eye was limited to hand motions at five feet and that he was unable to obtain visual fields. It is the physician’s opinion that the herpes must have reoccurred; that it is not unusual for a person in plaintiff’s condition to suffer with further episodes of the herpes disease, but is rather characteristic of the situation; and that, assuming the history given by plaintiff to be correct, the present condition was probably brought on by the initial injury. The Commission specifically found that the plaintiff is able to count fingers at three feet with the right eye and this is the extent of his vision. Further, that the plaintiff’s loss of vision is more than 85 percentum and amounts to industrial blindness within the meaning of the Workmen’s Compensation Act. (G.S. 97-31(19) provides that where there is 85-percentum, or more, loss of vision in any eye, it shall be deemed “industrial blindness” and compensated as for a total loss of vision of such eye.) These findings, which are supported by the evidence, support the Commission’s conclusion that “[t]he plaintiff’s loss of vision in the right eye is a result of the stipulated injury by accident to the right eye on May 23, 1967” and that “[t]he plaintiff at this time is industrially blind in the right eye.”
It is our opinion that the findings and conclusions made by the Commission constitute a sufficient determination of all the crucial questions before it.
Affirmed.
Judges Brock and Vaughn concur.