Rigid gas permeable lens are made of-
Correct Answer: Co polymer of PMMA, Silicon containing monomer & cellulose acetyl butyrate
Description: 1. Hard lenses: Made of pokymethylmethacrylate (PMMA) 2. Rigid gas permeable (RGP) lenses: Copolymer of PMMA, silicon containing vinyl monomer & cellulose acetate butyrate (CAB) are used to manufacture RGP lenses. 3. Soft lenses: These are made up of hydroxymethymethacrylate (HEMA)
Category:
Ophthalmology
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