Peripheral curve radius Discuss limitations in measuring the peripheral curve radius of rigid contact lenses. Power Describe the methods of measuring the power of a rigid contact lens. Measure the power of a rigid contact lens. Describe the methods of measuring the center thickness of a rigid contact lens. Measure the center thickness of a rigid contact lens.
Edge Describe the procedure used for evaluating the quality of the edge of a rigid contact lens.
Inspect the edge of a rigid contact lens. Surface and optical quality Describe the procedure used to verify surface condition and optical quality of a rigid contact lens. Verify the surface condition and optical quality of a rigid contact lens. Routine inspection Name the instruments used to perform a routine inspection of a rigid contact lens to assure all parameters agree with the American National Standards Institute Z80 requirements. State the minimum acceptable pupillary area coverage the optical zone of a contact lens must provide.