Optometry, op TOM uh tree, is a profession devoted to the care of vision. Optometrists give eye health and vision examinations. They diagnose vision problems that affect a person's ability to see nearby and distant objects clearly and to judge distance. They also test the ability of the eyes to work together and to change focus easily. Optometrists prescribe eyeglasses and contact lenses to correct faulty vision. In the United States, optometrists can perform minor procedures, such as removing foreign objects from the eye, and treat some forms of glaucoma and other eye diseases with drugs. They also may recommend vision therapy to help a person overcome certain vision problems.