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目的：探讨透气性硬性接触镜（ＲＧＰＣＬ）对圆锥角膜眼的视力矫正与治疗效果。方法：观察１０１ 例圆锥角膜，选择配戴ＲＧＰＣＬ的病例，对其中角膜变形严重无法单独使用ＲＧＰＣＬ的７ 只眼采用了Ｐｉｇｇｙｂａｃｋ ｌｅｎｓ（软性接触镜与硬性接触镜的组合使用）。随访时间１～２４ 个月。结果：以轻、中度圆锥角膜为主，处方ＲＧＰＣＬ的基础曲率半径绝大多数大于７．３０ｍｍ ，度数小于－ ６．００Ｄ。ＲＧＰＣＬ矫正视力达１．０、１．２ 的占４８ ％ ，０．６ 以上的达８２％ ，明显优于框架眼镜。戴镜时间每日平均１３．５ 小时，无明显角结膜并发症出现。ＲＧＰＣＬ戴用后角膜散光度平均减少１．７０～２．２１Ｄ，近视度平均降低０．７５ ～２ ．１０Ｄ，角膜形状明显扁平化。Ｐｉｇｇｙｂａｃｋｌｅｎｓ 明显改善了配适状态，提高了矫正视力和舒适度。结论：ＲＧＰＣＬ对圆锥角膜的高度屈光不正矫正效果良好。在严密观察下，可对重症病例选择使用Ｐｉｇｇｙｂａｃｋｌｅｎｓ。
Objective: To investigate the vision correction and therapeutic effect of RGPCL on keratoconus. Methods: 101 cases of keratoconus were selected and RGPCL patients were enrolled. Piggyback lenses (a combination of soft contact lens and hard contact lens) were used for the seven eyes in which corneal deformity was serious and RGPCL alone could not be used alone. Follow-up time of 1 to 24 months. Results: With mild and moderate keratoconus, the basic radius of curvature of the prescription RGPCL was mostly larger than 7.30mm and the degree was less than -6.00D. RGPCL corrected visual acuity of 1.0,1.2 accounted for 48%, up to 82% of 82%, significantly better than the glasses. Wear glasses an average of 13.5 hours a day, no significant complications of the conjunctiva appeared. After wearing RGPCL corneal astigmatism average reduction of 1.70 ~ 2.21D, myopia decreased by an average of 0.75 to 2. 10D, corneal shape was significantly flattened. Piggybacklens significantly improves fit and improves corrected sight and comfort. Conclusions: RGPCL has a good correction of keratoconus high refractive errors. Under close observation, Piggybacklens can be chosen for critically ill patients.