Friberg T R, Fourman S B
Department of Ophthalmology, Eye and Ear Institute, University of Pittsburgh, PA 15213.
Arch Ophthalmol. 1990 Nov;108(11):1622-7. doi: 10.1001/archopht.1990.01070130124042.
Ocular rigidity is the change in intraocular pressure produced by an incremental change in intraocular volume. Ocular rigidity was determined in 14 donor eyes by injecting small increments of a balanced salt solution through the limbus, while continually monitoring the intraocular pressure with a transducer. A buckling procedure was then performed in these eyes with the use of various solid silicone or stainless steel encircling elements, and the experiments were repeated. Buckled eyes were significantly less rigid than unbuckled eyes, and eyes with higher buckles were significantly less rigid than those with shallower buckles. The observed changes in rigidity are likely secondary to changes in the shape and stress distribution of the scleral shell and are only to a small degree related to the elasticity of the encircling element. Greater volumes of vitreous substitutes, gases, or antibiotics may be injected into buckled eyes compared with unbuckled eyes before excessive intraocular pressures are reached.
眼硬度是眼内容积的增量变化所产生的眼内压变化。通过经角膜缘注入小剂量平衡盐溶液，同时用换能器持续监测眼内压，在14只供体眼中测定了眼硬度。然后在这些眼中使用各种固体硅胶或不锈钢环扎元件进行环扎手术，并重复实验。环扎眼的硬度明显低于未环扎眼，环扎较高的眼比环扎较浅的眼硬度明显更低。观察到的硬度变化可能继发于巩膜壳形状和应力分布的改变，并且仅在很小程度上与环扎元件的弹性有关。与未环扎眼相比，在达到过高眼内压之前，可向环扎眼注入更多体积的玻璃体替代物、气体或抗生素。
