RT Journal Article SR Electronic T1 Vitrectomy: A Pars Plana Approach JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 489 OP 489 DO 10.1136/bjo.60.6.489-b VO 60 IS 6 A1 J. J. Kanski YR 1976 UL http://bjo.bmj.com/content/60/6/489.3.abstract AB