Biomaterial Database

Night myopia. 1985

R J Seymore

Night myopia is a correctable cause of decreased visual acuity under conditions of decreased illumination. Even people with 20/20 vision may have this problem. Correction of the decreased visual acuity in darkness may be especially important in certain occupations. Night myopia is related to the way light is refracted onto the retina. Even the normal or slightly nearsighted eye may not be able to focus the indigo-violet wavelengths of light on the retina.

UI	MeSH Term	Description	Entries
D009216	Myopia	A refractive error in which rays of light entering the EYE parallel to the optic axis are brought to a focus in front of the RETINA when accommodation (ACCOMMODATION, OCULAR) is relaxed. This results from an overly curved CORNEA or from the eyeball being too long from front to back. It is also called nearsightedness.	Nearsightedness,Myopias,Nearsightednesses
D003624	Darkness	The absence of light.	Darknesses
D005139	Eyeglasses	A pair of ophthalmic lenses in a frame or mounting which is supported by the nose and ears. The purpose is to aid or improve vision. It does not include goggles or nonprescription sun glasses for which EYE PROTECTIVE DEVICES is available.	Glasses,Spectacles,Sun Glasses, Prescription,Glasses, Prescription Sun,Prescription Sun Glasses
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001359	Aviation	Design, development, manufacture, and operation of heavier-than-air AIRCRAFT.	Parachuting,Air Traffic Control,Control, Air Traffic,Traffic Control, Air
D014792	Visual Acuity	Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.	Acuities, Visual,Acuity, Visual,Visual Acuities