Bennett E S
J Am Optom Assoc. 1983 Mar;54(3):239-42.
Handling long-term polymethylmethacrylate (PMMA) lens wearers, especially those suffering severe corneal oxygen deprivation, has been a problem much relieved by the introduction of oxygen permeable rigid lenses. Previous methods including lens modifications, discontinuation of lens wear, and de-adaptation possessed limitations which could cause the patient to experience permanent corneal curvature and refractive changes. Immediately refitting these patients with gas permeable lenses has been a procedure which appears to have eliminated many of the previous problems and has achieved rapid approval from contact lens practitioners the past few years. This paper discusses how this procedure can be performed to the satisfaction of both the optometrist and the patient.
对于长期佩戴聚甲基丙烯酸甲酯（PMMA）镜片的患者，尤其是那些患有严重角膜缺氧的患者，引入透氧性硬性镜片后，这个问题得到了很大缓解。以前的方法，包括镜片改良、停止佩戴镜片和去适应，都存在局限性，可能会导致患者出现永久性角膜曲率和屈光变化。立即为这些患者重新验配透气镜片这一做法似乎消除了许多以前的问题，并且在过去几年中获得了隐形眼镜从业者的迅速认可。本文讨论了如何进行这一操作，以使验光师和患者都满意。
