colour blindness Sometimes this term is incorrectly used to cover all forms of colour vision deficiency, however mild or severe. See achromatopsia; defective colour vision; deuteranopia; monochromat; protanopia; tritanopia.congenital stationary night blindness Night blindness (nyctalopia) inherited as ...
Myopia is the medical term for nearsightedness. People with myopia see objects more clearly when they are close to the eye, while distant objects appear blurred or fuzzy. Reading and close-up work may be clear, but distance vision is blurry. ...
1. Night blindness –People who have vision disorders such as night blindness, poor vision during night, dry eyes should go for Vitamin A testing. 2. Anemia –Those who have a poor hemoglobin and have a pale skin also should get tested for vitamin A. 3. Liver disorders –Liver cirrhosis,...
1.any β-ionone derivative, except provitamin A carotenoids, possessing qualitatively the biologic activity of retinol; deficiency interferes with the production and resynthesis of rhodopsin, thereby causing night blindness, and produces a keratinizing metaplasia of epithelial cells that may result in xero...
The eyes are used for corneal transplants and research. See keratoplasty.black eye A colloquial term for a swollen or blue-black spot on the skin of the eyelid caused by effusion of blood as a result of a superficial injury in which the skin is not broken. The correct term is ...
A regional term for a woman who trades sex for crack or money to buy crack. Medical ethicsA medical decision in which the difference between the outcomes from following one strategy (e.g., screening or treating) or another (e.g., not screening or not treating) is negligible and the ...
Oguchi's diseaseAn autosomal recessive, inherited night blindness occurring mainly in Japan. All other visual capabilities are usually unimpaired but the patient presents an abnormal golden brown fundus reflex in the light-adapted state, which becomes a normal colour with dark-adaptation (Mizuo phenome...
• Inability to read musical notation (musical alexia, music blindness, musical blindness, note blindness, receptive amusia); or • Inability to interpret musical sounds (a condition for which the term tone deafness is most appropriate). ...
and is necessary for light-sensitive pigments in the eye that make night vision possible. The particular manifestation of vitamin A deficiency depends upon the age of the patient. Among the most common symptoms of vitamin A deficiency is night blindness. The skin may also be affected, becoming ...
Trump’s second term threatens US leadership on global health Wellbeing of billions could be hit if administration cuts funding and spurns scientific best practice January 10 2025 The Big Read The rising threat of deadly diseases jumping from animals to humans ...