Frieling E, Steinert R F
Center for Eye Research, Boston, Mass.
Arch Ophthalmol. 1993 Mar;111(3):381-3. doi: 10.1001/archopht.1993.01090030101048.
Many operative and postoperative factors can influence cataract wound stability and postoperative astigmatism. The final outcome is fundamentally dependent on the intrinsic biomechanical stability of the corneal dome in the presence of the wound. We determined the stability of the central and peripheral cornea with computer-assisted topographic analysis of six freshly enucleated human globes. Self-sealing, unsutured, scleral tunnel wounds 4.0 mm in length were dissected, with widths varying from 1.4 to 6.0 mm. Intraocular pressure was elevated in 5-mm increments from 15 to 40 mm Hg without measurable topographic change in the visual axis or superior cornea. We conclude that these long scleral tunnel wounds do not necessarily destabilize the cornea within the usual range of intraocular pressure. Postoperative-induced astigmatism is therefore due to other operative and postoperative factors. Some of these factors may be identifiable with this model and controlled or eliminated.
许多手术中和术后因素会影响白内障手术伤口的稳定性和术后散光。最终结果在根本上取决于伤口存在时角膜穹顶的内在生物力学稳定性。我们通过计算机辅助地形图分析对六个新鲜摘除的人眼球进行研究，以确定中央和周边角膜的稳定性。我们切开了长度为4.0毫米的自封闭、未缝合的巩膜隧道伤口，其宽度在1.4至6.0毫米之间变化。眼内压以5毫米汞柱的增量从15毫米汞柱升高至40毫米汞柱，视轴或角膜上方未出现可测量的地形图变化。我们得出结论，在眼内压的正常范围内，这些长的巩膜隧道伤口不一定会破坏角膜的稳定性。因此，术后散光归因于其他手术中和术后因素。其中一些因素可以通过该模型识别并加以控制或消除。
