Optometrists provide public health services in vision care. They examine eyes to diagnose vision problems and ocular disease (pertaining to the eye). They prescribe and fit eyeglasses and contact lenses and recommend treatment such as exercises to correct vision problems or ocular disorders. Optometrists should not be confused with Ophthalmologists or dispensing opticians. Ophthalmologists are physicians who diagnose eye disease and injuries and treat problems with surgery or drugs. Like an Optometrist, they also examine the eyes and can prescribe eyeglasses and contact lenses. Dispensing Opticians fit and adjust eyeglasses and may fit contact lenses according to prescriptions written by an Ophthalmologist or Optometrist.