Ametropia c - Study guides, Class notes & Summaries

NCLE Practice base curve - refers to the radius of curvature of the central posterior surface of the lens. It may be expressed in diopters of surface power (D) or in millimeters (mm) of radius or curvature. optical zone - the chord diameter over which the base curve extends on the posterior surface of the contact lens, described in millimeters secondary or intermediate curves - lies between the base curve and the peripheral curve on the posterior lens surface, usually 0.70mm to 1.50mm f...

NCLE Optometry Exam Comprehensive optic zone - the central portion of a contact lens which contains the refractive power and generally corresponds to the central corneal cap posterior apecal radius - this term is generally used in reference to spin-cast soft lenses. the curvature of the posterior surface of the lens changes with the refractive power. the radius of curvature is measured at the apex of the posterior surface. steeper base curve - occurs when the posterior radius of curvat...

COT Clinical Optics Exam Review Manual 2024 Actual Questions and Answers with complete solution The range of wavelengths in the visible spectrum is: a) 100 to 400 nanometers b) 400 to 800 nanometers c) 450 to 650 nanometers d) 400 to 800 meters (m) 400 to 800 nanometers Immediately on either side of the visible spectrum are the invisible light segments of: a) Infrared and ultraviolet b) X-rays and radio waves c) Gamma rays and laser d) Microwaves and radar Infrared and ultraviolet ...