RT Journal Article SR Electronic T1 Combined posterior contusion and penetrating injury in the pig eye. III. A controlled treatment trial of vitrectomy. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 282 OP 285 DO 10.1136/bjo.67.5.282 VO 67 IS 5 A1 Z Gregor A1 S J Ryan YR 1983 UL http://bjo.bmj.com/content/67/5/282.abstract AB A controlled trial of vitrectomy following combined experimental posterior contusion and penetrating eye injury was performed on a group of pigs at 1 day, 2 weeks, and at 10 weeks after the initial injury. Severe intraoperative haemorrhage occurred in 5 eyes operated on at day after injury and in one eye operated on at 2 weeks after injury, but no haemorrhage occurred when surgery was performed 10 weeks after injury.