new icn messageflickr-free-ic3d pan white
Using a Phoropter | by National Eye Institute
Back to photostream

Using a Phoropter

A phoropter is a machine used to detect refractive errors.

 

Please credit National Eye Institute, National Institutes of Health.

11,096 views
2 faves
0 comments
Taken on July 10, 2012