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.
Many medical devices that require a prescription aren't allowed, for example: 1  Contact lenses (prescription or non-prescription) 2  Prescription eyewear* (vintage eyeglasses sold for collectible purposes are allowed) 3  Electrical Muscle Stimulation (EMS) units and their accessories that require a prescription.