contact lens sale, contact lenses, contact lens discount, cheap contact lenses, contact lens online, contact lenses buy, buy contact lenses, contact lenses cheap, buy contact lenses online, contact lens buy, contact lens comparison, contact lense discount, contact lens center, contact lens eshopping, contact lens suppliers, contact lenses and online, cheap or discount contacts, cheapest contact lenses, contact lenes, contact lens companies, contact lens special, contact lenses by mail, contact lenses direct, contact lens disposables, contact lenses comparaison, contact lense for sale, contact lense price

ciba uses molds made of transparent quartz glass, which can contacts be reused, unlike the plastic molds used for hydrogel lenses. a drop of nelfilcon a is placed onto one half of the mold, and the complementary half is suspended a few micrometers away. a circular mask is placed around the edge of the lens, and ultraviolet light is shined through the molds to cure the polymer. the mask blocks the uv light and creates a precise, smooth rim. this allows for a consistent shape with an edge half the thickness of other lenses. a thinner edge reduces what''s known as edge sensation, discomfort caused by the eyelid rubbing against the lens rim. a lens is about 14 millimeters in diameter, but only the center portion, 8 mm across, is shaped to correct vision.

ciba uses molds made of transparent quartz glass, which can contacts be reused, unlike the plastic molds used for hydrogel lenses. a drop of nelfilcon a is placed onto one half of the mold, and the complementary half is suspended a few micrometers away. a circular mask is placed around the edge of the lens, and ultraviolet light is shined through the molds to cure the polymer. the mask blocks the uv light and creates a precise, smooth rim. this allows for a consistent shape with an edge half the thickness of other lenses. a thinner edge reduces what''s known as edge sensation, discomfort caused by the eyelid rubbing against the lens rim. a lens is about 14 millimeters in diameter, but only the center portion, 8 mm across, is shaped to correct vision.

©2003 www.cosmetic-contact-lenses.net. All rights reserved.