The table below lists fully habitable buildings, not observation towers. For statistics on CN Tower and other very tall structures, see our directory of TV, Radio & Observation Towers.
A detailed examination of the eye can reveal conditions such as high blood pressure or diabetes. Optometrists make a health assessment, offer clinical advice and when necessary prescribe spectacles or contact lenses. In addition, optometrists can dispense, fit and supply spectacles or contact lenses. They also supervise trainee optometrists and dispensing opticians, and medical students.
1 Prescribe medications to treat eye diseases if state laws permit. 2  Prescribe, supply, fit and adjust eyeglasses, contact lenses and other vision aids. 3  Analyze test results and develop a treatment plan. 4  Educate and counsel patients on contact lens care, visual hygiene, lighting arrangements and safety factors.