History Of Modern Contact Lenses
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6 жыл бұрынModern contacts made of plastic rather than glass, were introduced in 1948. In 1971, soft contacts were introduced, that could bind up to 74 percent water. The silicone hydrogel lens entered the market in 1999, and has become the fastest growing contact lens segment worldwide.
www.blog.contactlensking.com
@1953childstar 3 жыл бұрын
Plastic ( PMMA ) contact lenses were introduced in the mid 1930's…Europe had soft contact lenses before the FDA approved them for use in the USA. The lenses "technically" introduced in 1948, were corneal, although there is debate that they may had been introduced prior to this...
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