巩膜镜，是大直径的接触点在巩膜上的硬性高透氧隐形眼镜。

巩膜镜使用新一代的硬式隐形眼镜高透氧材料Boston XO2、Menicon Z等制造，直径一般在14mm到22mm，镜片内填充生理盐水，镜片接触的是眼球中相对不敏感的眼白巩膜部位，戴起来相对于小直径的角膜接触镜更加舒服。

A scleral lens, also known as a scleral contact lens and ocular surface prostheses is a large contact lens that rests on the sclera and creates a tear-filled vault over the cornea. Scleral lenses are designed to treat a variety of eye conditions, many of which do not respond to other forms of treatment.