ophthalmology

from WordNet (r) 3.0 (2006)

ophthalmology
    n 1: the branch of medicine concerned with the eye and its
         diseases

from The Collaborative International Dictionary of English v.0.48

Ophthalmology \Oph`thal*mol"o*gy\, n. [Gr. 'ofqalmo`s the eye +
   -logy: cf. F. ophthalmologie.]
   The science which treats of the structure, functions, and
   diseases of the eye.
   [1913 Webster]