Hales R H
Ann Ophthalmol. 1977 Sep;9(9):1085-90.
Gas-permeable cellulose acetate butyrate (CAB) contact lenses may often be worn succesfully by aphakic and other patients who are unable to wear hard contact lenses. The comfort characteristics of the CAB lenses are betweeen those of hard and soft contact lenses. They are much more permeable to O2 and CO2 than soft lenses and thus are less apt to cause edema. They are more flexible and more wettable than hard lenses. This study presents 50 patients who, having had to discontinue wearing hard contact lenses because of discomfort, diffuse central corneal edema, or visual problems, were fitted with CAB contact lenses. Thirty of the fifty were able to wear the CAB lenses successfully.
透气的醋酸丁酸纤维素（CAB）隐形眼镜通常可供无晶状体眼患者及其他无法佩戴硬性隐形眼镜的患者成功佩戴。CAB镜片的舒适度介于硬性和软性隐形眼镜之间。它们对氧气和二氧化碳的通透性比软性镜片高得多，因此不太容易引起水肿。它们比硬性镜片更柔软、更易湿润。本研究介绍了50例因不适、弥漫性中央角膜水肿或视力问题而不得不停止佩戴硬性隐形眼镜的患者，为他们验配了CAB隐形眼镜。50例患者中有30例能够成功佩戴CAB镜片。
