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> Nikon focimeter ophthalmic optomometry lensometer ol 7
Nikon focimeter ophthalmic optomometry lensometer ol 7
Unit Powers Up and has Clear Optics
Comes Complete as seen in photos
The cool-running, energy-efficient LED light source provides a clear green illumination target, and virtually maintenance-free operation.
Maintenance-free LED illumination
A lensmeter or lensometer, also known as a focimeter[1], is an ophthalmic instrument. It is mainly used by optometrists and opticians to verify the correct prescription in a pair of eyeglasses, to properly orient and mark uncut lenses, and to confirm the correct mounting of lenses in spectacle frames. Lensmeters can also verify the power of contact lenses, if a special lens support is used.
The parameters appraised by a lensmeter are the values specified by an ophthalmologist or optometrist on the patient's prescription: sphere, cylinder, axis, add, and in some cases, prism. The lensmeter is also used to check the accuracy of progressive lenses, and is often capable of marking the lens center and various other measurements critical to proper performance of the lens. It may also be used prior to an eye examination to obtain the last prescription the patient was given, in order to expedite the subsequent examination.
