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 all states, optometrists and ophthalmologists must release a prescription for. eyeglasses to a patient, upon request. An optician dispenses eyeglasses pursuant to a valid prescription of a licensed physician or. optometrist. Opticians do not have prescriptive power and may not modify a prescription. Unlike the. practice of optometry or ophthalmology, opticianry does not require licensure in all 50 states.