About this document
Lens Material Properties Overview by Rahul Das is a document available to read on EtoBox.
The document discusses properties of ophthalmic lenses including specific gravity, scratch resistance, impact resistance, and tensile strength. It provides details on specific gravity as the ratio of mass to a reference substance and how a higher specific gravity means a denser, heavier lens. It also describes scratch resistance coatings applied to plastic lenses and impact resistance testing using a drop ball test.
- Author
- Rahul Das
- Language
- EN