Methods: Four minipigs qualified for experiment were included in the study.One eye underwent sclerotomy with 25G trocar (25G group) and the other underwent 20G-PPV (20G group).

• 方法:版纳实验用小型猪4只,采用随机对照的方法,选择一只眼行25G巩膜切开术(25G组),另一眼行常规20G玻璃体手术(20G组)。