RT Journal Article SR Electronic T1 Evaluation of the results of surgery to correct congenital ptosis of the upper eyelid JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1172 OP 1177 VO 94 IS 22 A1 Dayal, Y. A1 Crawford, J. S. YR 1966 UL http://www.cmaj.ca/content/94/22/1172.abstract