orthoptics

noun (used with a singular verb)

1. a method of exercising the eye and its muscles in order to cure strabismus or improve vision.

noun

1. (functioning as singular) the science or practice of correcting defective vision, as by exercises to strengthen weak eye muscles

n.

1. The study and treatment of defective binocular vision, of defects in the action of the ocular muscles, or of faulty visual habits.