A mains electricity (AC-powered) ophthalmic instrument designed to measure the focusing power (dioptric power) and other optical characteristics of a spectacle lens, contact lens, or prism. The device is fully automated and does not require manual adjustmen...
A mains electricity (AC-powered) ophthalmic instrument designed to measure the focusing power (dioptric power) and other optical characteristics of a spectacle lens, contact lens, or prism through manual adjustments to the instrument performed by the operat...