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An example of the Landolt C eye chart (also known as the Japanese eye chart). Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision, while the ETDRS chart is designed for use at 4 meters. [16]
Amsler grid, Chart 1 There are 7 types of Amsler grid charts. All charts measure 10 cm × 10 cm (3.9 in × 3.9 in), which when viewed at a distance of 33 cm (13 in) from the eye can be used to measure defects in the central 20 degrees of the visual field .
A pair of dental loupes featuring in-lens magnification. There is a loupe light mounted on the bridge of the loupes and side shields (not shown) on the temples to protect a dentist's eyes from splatter. Dentists, hygienists, and dental therapists typically use binocular loupe glasses since they need both hands free when performing dental ...
As people age they attend dental services less frequently, and face a number of barriers to accessing dental care. This involves clinics not being easily accessible for frail, disabled or functionally dependant elderly who have limited mobility, and are wheelchair dependant and/or cognitively impaired. [ 37 ]
-do-; standard chart of alphabets; video link •Colour vision: to test colour vision ••Ishihara's chart: to determine the type of colour blindness Stenopaeic slit: detection of axis of the cylindrical (astigmatism) power of the eye; glaucoma testing Implants - •Intraocular lens: prosthetic lenses implanted after lens (anatomy) removal ...
Dental care or dentalcare is the maintenance of healthy teeth and may refer to: Oral hygiene , the practice of keeping the mouth and teeth clean in order to prevent dental disorders Dentistry , the professional care of teeth, including professional oral hygiene and dental surgery
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Another test, including Visual acuity (EVTS/OptimEyes), uses targets which change in size, contrast, and viewing time. This test was developed by Daniel M. Laby with colleagues and uses item response theory to calculate a vision performance score (core score). This specific test of visual function has been shown to correlate to professional ...