复杂性视网膜脱离的玻璃体手术中 ,注入重水后常采用笛针进行气 -重水交换 ,但这种交换方式对巨大裂孔性视网膜脱离病例 ,会因巨大裂孔瓣缘失去重水的支撑而向下折翻或退缩 ,造成激光封闭失效等 ,有引起视网膜再次脱离的潜在可能。对此 ,我们利用重水的重力和气体的张力 ,采用 In vitreous surgery with complex retinal detachment, gas-water exchange is usually performed using a beard needle after heavy water is injected. However, this exchange mode can be folded downwards due to the loss of heavy water support due to the huge lobed retinal detachment Or retreat, resulting in laser closure failure, there is the potential to cause retinal detachment again. In this regard, we use heavy water gravity and gas tension, used