Goldbaum M H, Smithline M, Poole T A, Lincoff H A
Am J Ophthalmol. 1975 Jun;79(6):958-65. doi: 10.1016/0002-9394(75)90678-9.
Tension analysis along the retinal surface demonstrates the advantage of meridional buckles over limbal-parallel buckles. A cylindrical sponge generates tensional forces in the retina along the long axis of the buckle and perpendicular to it. The tension perpendicular to the sponge is positive, and the retina and retinal pigment epithelium stretch in that direction. The tension along the long axis is positive (stretching) when the buckle is less than 90 degrees arc length; and negative (compression), greater than 90 degrees for a 5-mm sponge. Consequently, retinal compression folds on the buckles occur for buckles of arc length greater than 90 degrees. These tension forces at right angles to each other explain the development of (1) concave retinal detachment or retinal folds off short limbal-parallel buckles, (2) retinal folds on long limbal-parallel buckles, and (3) fishmouthing of horseshoe tears overlying a limbal-parallel buckle. The buckle increases retinal surface area overlying the buckle. The significance of this is not clear, but it may explain the lessening or disappearance of compression folds on the buckle in time.
沿视网膜表面的张力分析显示了子午线扣带相对于角膜缘平行扣带的优势。圆柱形海绵沿着扣带的长轴并垂直于该长轴在视网膜中产生张力。垂直于海绵的张力为正，视网膜和视网膜色素上皮在该方向上伸展。当扣带的弧长小于90度时，沿长轴的张力为正（拉伸）；对于5毫米的海绵，大于90度时为负（压缩）。因此，对于弧长大于90度的扣带，在扣带上会出现视网膜压缩褶皱。这些相互垂直的张力解释了以下情况的发生：(1) 短的角膜缘平行扣带上出现凹面视网膜脱离或视网膜褶皱，(2) 长的角膜缘平行扣带上出现视网膜褶皱，以及(3) 覆盖在角膜缘平行扣带上的马蹄形裂孔出现鱼嘴样改变。扣带增加了扣带上方的视网膜表面积。其意义尚不清楚，但这可能解释了随着时间推移扣带上压缩褶皱的减轻或消失。
