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.
In some states, opticians may be licensed to fit contact lenses. Opticians often work closely within the same practice as an optometrist or ophthalmologist, or an optician may have an independent practice. An ophthalmologist is a medical doctor who is specialized in eye and vision care.