Phoropters, the gadgets used by opthalmologists to test your eyes look like the most spectacular binoculars you have ever seen.The traditional complex mechanical versions are technological works of art made by lens makers such as Bausch and Lomb and have the design quality of a classic vintage Leica camera. Only now are these marvelous gadgets slowly being replaced by simpler looking, wireless, digital versions which relay data to a computer for image analysis.