(Gr. 609aXµ6s, eye), the science of the anatomy, physiology and pathology of the eye (see EYE and VIsIoN). From the same Greek word come numerous other derivatives: e.g. ophthalmia, the general name for conjunctival inflammations (see Eye diseases, under EYE); and the instruments ophthalmometer and ophthalmoscope (see VIsIoN).