https://core.uwaterloo.ca/publication/use-of-reverse-geometry-rigid-gas-permeable-contact-lenses-in-the-management-of-the-postradial-keratotomy-patient-review-and-case-report/
Use of reverse geometry rigid gas permeable contact lenses in the management of the postradial...
Use of reverse geometry rigid gas permeable contact lenses in the management of the postradial keratotomy patient: Review and case report
gas permeable contact lenses
https://pubchem.ncbi.nlm.nih.gov/patent/EP-0397683-B1
Compositions for making improved gas permeable contact lenses - Patent EP-0397683-B1 - PubChem
EP-0397683-B1 chemical patent summary.
gas permeable contact lenses