Marco Nidek 500a autorefractor SIX MONTH WARRANTY Brand_Nidek and optic nerve head measurements

and optic nerve head measurements to a database of normal subjects

distance-independent measurements and a reading that’s up to 4 times faster compared to other optical devices provide outstanding usability and reduced chair time

Full auto alignment

Cornea diameter measurement

The AT555 offers easy operation for fast

Marco Nidek 500a autorefractor SIX MONTH WARRANTY Brand_Nidek and optic nerve head measurements6 month warranty Excellent condition The NIDEK ARK 500A is an autorefractor keratometer which contains both a refractormeter and keratometer in one unit. The refractometer objectively measures refractive errors of sphere, cylinder, and axis for lenses that correct the patients vision into emmetropia. The ketatometer measures the corneal curvature radius (corneal refractive power), principal meridian direction and corneal cylendrical power. Refraction