2.0.00 to -6.00 diopters(0.00 to -8.00 diopters with additional lens of -2.00 diopters)
3.Unique new convergence system mechanism
4.Fingertip adjustment for sphere power control
5.Classic appearance, professional technology, precise measurement, easy and convenient operating, and best price value
وصف
Functions of Refraction For binocular visual function tests, subjective eye examination instruments have been invented to make insertion easier and faster