Ophthalmology Rigid gas permeable lens are made of- A Plymethymethacrylate B Hydroxymethylmethacrylate C Co polymer of PMMA, Silicon containing monomer & cellulose acetyl butyrate D Cellulose acetae Butyrate 💡 Explanation Rigid gas permeable lens are made of- ✓ Correct Answer: C. Co polymer of PMMA, Silicon containing monomer & cellulose acetyl butyrate