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What are the difference between soft and hard contact lenses ?

April 26, 2017contact lenses difference hard soft

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What are the difference between soft and hard contact lenses ?

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Soft lenses are manufactured from a plastic hydrogel polymer, HydroxyEthylMethacrylate (HEMA) which has a varying water content (38% – 70%). Lens size is between 13.00 and 14.50mm. Centre thickness from 30um. Hard contact lenses are manufactured from a rigid material, PolyMethylMethacrylate (PMMA). This material can be combined with other plastics to increase the oxygen permeability. Lens size is between 8.0mm and 10.00mm. Centre thickness from 100um.