A Consumer Guide to Bifocal Contact Lenses | 合法醫療器材資訊網

Withbifocaleyeglasses,thismechanismworksbecausethelensesstayinplaceevenasyoureyemoves.Unlikesoftmultifocalcontactlenses(whichmovewith ...

Bifocal and multifocal contact lenses are designed to provide clear vision at all distances for people who have refractive errors[1] and also are experiencing the normal age-related decline in near vision called presbyopia[2].

The main sign that youre developing presbyopia — which typically becomes noticeable sometime after age 40 — is that you need to hold your phone, magazines and other reading material farther from your eyes in order to see them clearly.

Bifocal and multifocal contact lenses[3] come in both soft materials and rigid gas permeable[4] (GP) materials. Some can be worn on a disposable[5] basis. That means you have the convenience of throwing the lenses out at specified intervals (even daily, in some cases) and replacing them with fresh, new lenses.

Several lens manufacturers offer multifocal contact lenses made of silicone hydrogel[6] m...