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Homonymous hemianopsia. Hemianopsia, or hemianopia, is a visual field loss on the left or right side of the vertical midline. It can affect one eye but usually affects both eyes. Homonymous hemianopsia (or homonymous hemianopia) is hemianopic visual field loss on the same side of both eyes. Homonymous hemianopsia occurs because the right half ...
Instrument myopia. Instrument myopia is the tendency of a person with normal eyes to focus them too close when looking into an optical instrument at its image. [1] Optical instruments include viewfinders, telescopes, binoculars, and microscopes. [1] [2] For example, through a microscope, a person might focus the eyes to one meter distance ...
Adaptation (eye) In visual physiology, adaptation is the ability of the retina of the eye to adjust to various levels of light. Natural night vision, or scotopic vision, is the ability to see under low-light conditions. In humans, rod cells are exclusively responsible for night vision as cone cells are only able to function at higher ...
By measuring this zone, the autorefractor can determine when a patient's eye properly focuses an image. The instrument changes its magnification until the image comes into focus. The process is repeated in at least three meridians of the eye and the autorefractor calculates the refraction of the eye, sphere, cylinder and axis.
See Forever Eyes is the second studio album by the Canadian rock band Prism. [2] It was originally released in 1978 by GRT. The album was recorded over a period of five months in 1978, at Mushroom Studios, Vancouver, at Little Mountain Sound Studios, Vancouver, and at Pinewood Studios. It was produced by the future multi-award-winning producer ...
Purpose. whether a person has strabismus. In the fields of optometry and ophthalmology, the Hirschberg test, also Hirschberg corneal reflex test, is a screening test that can be used to assess whether a person has strabismus (ocular misalignment). A photographic version of the Hirschberg is used to quantify strabismus. [1]