1) Measuring instrument
Found on
https://www.crosswordclues.com/clue/phoropter
A phoropter is an instrument commonly used by eye care professionals during an eye examination, containing different lenses used for refraction of the eye during sight testing, to measure an individual`s refractive error and determine his or her eyeglass prescription. Typically, the patient sits behind the phoropter, and looks through it at an ey....
Found on
http://en.wikipedia.org/wiki/Phoropter
device with several lenses used to test eyesight
Found on
http://phrontistery.info/p.html
(for-op´tәr) an instrument for evaluation of vision, with lenses placed on dials in a unit that is positioned in front of the patient.
Found on
http://www.encyclo.co.uk/local/21001
No exact match found.
