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distance visual acuity
measure of the ability to see the details and shape of identifiable objects from a specified distance, typically using a Snellen chart
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fluorescein angiography
visualization and photography of retinal and choroidal vessels made as fluorescein dye, which is injected into a vein, circulates through the eye
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ophthalmoscopy
use of an opthalmoscope to view the interior of the eye
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refraction
measurement of refractive errors using a phoropter to determine best corrected vision and prescription for eye glasses or contact lenses
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phoropter
instrument that holds corrective lenses in front of the eye to determine optical correction
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slit-lamp biomicroscopy
use of a tabletop microscope to examine the eye, especially the cornea, lens, fluids and membranes
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sonography
use of high-frequency sound waves to detect pathology within the eye such as foreign bodies or a detached retina
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tonometry
use of a tonometer to measure intraocular pressure, which is elevated in glaucoma
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