Parver L M, Lincoff H
Mod Probl Ophthalmol. 1977;18:338-43.
The relationship between the volume of an intraocular gas bubble and the area of retina covered by the bubble was studied using both a transparent model and a mathematical model of the vitreous cavity. The arc of contact of intraocular bubbles was calculated for vitreous cavities of various diameters. A 0.28-cm3 bubble will cover 90 degrees of retina and be of sufficient size to manage the majority of problems for which an internal retinal tamponade would be useful. Larger retinal tears require disproportionately large increases in bubble volume to achieve modest increases in the area of retina covered. Estimating bubble volume by observing the height of the bubble meniscus in the dilated pupil is subjected to errors induced by small shifts in the angle of observation. A correct evaluation requires that the plan of observation be adjusted so that it coincides with the plane of the meniscus.
利用玻璃体腔的透明模型和数学模型，研究了眼内气泡体积与气泡覆盖视网膜面积之间的关系。计算了不同直径玻璃体腔的眼内气泡接触弧。一个0.28立方厘米的气泡将覆盖90度的视网膜，其大小足以解决大多数需要视网膜内填塞术的问题。较大的视网膜裂孔需要不成比例地大幅增加气泡体积，才能使覆盖的视网膜面积有适度增加。通过观察散瞳瞳孔中气泡弯月面的高度来估计气泡体积，会受到观察角度微小变化引起的误差影响。正确的评估需要调整观察平面，使其与弯月面平面重合。
