RT Journal Article SR Electronic T1 Advances in Vitreous Surgery JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 433 OP 433 DO 10.1136/bjo.61.6.433-a VO 61 IS 6 A1 A. D. McG. Steele YR 1977 UL http://bjo.bmj.com/content/61/6/433.2.abstract AB