Contact Lenses for Vision Correction | 合法醫療器材資訊網

2021年3月4日—WhatAreContactLenses?Contactlensesarethin,clearplasticdisksyouwearinyoureyetoimproveyourvision.Contactsfloatonthetear ...

Contact lenses are thin, clear plastic disks you wear in your eye to improve your vision. Contacts float on the tear film[1] that covers your cornea[2].

Like eyeglasses[3], contact lenses correct vision problems caused by refractive errors. A refractive error is when the eye does not refract (bend or focus) light properly into the eye resulting in a blurred[4] image.

Contacts can improve vision for people with these refractive errors:

Contacts are made from many kinds of plastic. The two most common types of contact lenses are hard and soft.

The most common type of hard contact lens is a rigid gas-permeable (RGP) lens. These lenses are usually made from plastic combined with other materials. They hold their shape firmly, yet they let oxygen...