CONTACT LENSES | 合法醫療器材資訊網

Contactlensesareamedicalaidplaceddirectlyonthecorneaoftheeye,...Todaythereisagreatvarietyofsofttoriclens,sothatmostpeoplewith ...

Contact lenses are a medical aid placed directly on the cornea of the eye, usually for therapeutic purposes, ie. correcting refractive errors of the eye, and sometimes for aesthetic purposes. The lens is a small and thin optical disc, made of different types of plastic. The history of contact lenses[1]

According to their function, contact lenses can be divided into:

Corrective contact lenses correct refractive errors of the eye. They work by focusing the rays of light directly to the retina. • Spherical contact lenses are used for correction of nearsightedness and farsightedness. Spherical lenses have only one diopter strength and freely rotate on the eye. • Toric lenses are used to correct astigmatism. They have two prescription strengths (one for the correction of nearsightedness or farsi...