\Op*tom"e*try\, n.
1. (Med.) Measurement of the range of vision, esp. by means
   of the optometer.
2. As defined (with minor variations) in the statutes of
   various States of the United States:
   (a) ``The employment of subjective and objective
       mechanical means to determine the accomodative and
       refractive states of the eye and the scope of its
       function in general.''
   (b) ``The employment of any means, other than the use of
       drugs, for the measurement of the powers of vision and
       adaptation of lenses for the aid thereof.''