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Eyewear
Eyeglasses, goggles or other objects worn over the eyes, usually to aid vision or for protective purposes.
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Eyewear > Optometry 
benign essential blepharospasm
Health care; Optometry
Neurological disorder causing involuntary muscle contractions, with eyelid muscle spasms.
Parkinson's disease
Health care; Optometry
Neurological disorder characterized by tremors, muscle rigidity, a shuffling walk and a mask-like appearance in the face. Parkinson's may also cause infrequent blinking.
aspheric
Health care; Optometry
Not quite spherical. Aspheric eyeglass lenses are popular among people who have strong prescriptions because they are thin and lightweight, and reduce distortion and eye ...
sun protection factor (SPF)
Health care; Optometry
Number representing the amount of sun something blocks. For example, if you normally begin to burn after half an hour in the sun, a sunscreen with an SPF of 2 should let you stay ...
transient ischemic attack (TIA)
Health care; Optometry
Often called a "ministroke," a TIA is a short-lived blood clot-induced blockage of the blood supply to the brain. Vision may be blurred; other symptoms may include numbness on ...
polymethyl methacrylate (PMMA)
Health care; Optometry
Old-fashioned hard contacts were made of PMMA, which is not permeable; today's rigid lenses contain other polymers that allow oxygen to reach your eye.
river blindness
Health care; Optometry
Onchocerciasis is caused by a parasitic worm, which is spread in the human bloodstream through bites from blackflies and buffalo gnats found in parts of Africa, South America, and ...
Sub-categories
- Contact lenses (3070)
- Eye surgery (2811)
- Glasses (802)
- Optometry (16172)
- Sunglasses (524)