• A controlled trial of pars plana vitrectomy for posterior penetrating eye injury was done in a group of rhesus monkeys to compare the results of limited (core) and complete vitrectomies performed one day and two weeks after injury. Although core vitrectomy was technically easier and led to fewer operative complications, the frequency of traction retinal detachment was significantly higher than after a complete vitrectomy. There was no significant difference between eyes operated on one day or two weeks after injury.
Gregor Z, Ryan SJ. Complete and Core Vitrectomies in the Treatment of Experimental Posterior Penetrating Eye Injury in the Rhesus MonkeyI. Clinical Features. Arch Ophthalmol. 1983;101(3):441-445. doi:10.1001/archopht.1983.01040010441021