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8.7% global prevalence in 2020 [2] Macular degeneration, also known as age-related macular degeneration (AMD or ARMD), is a medical condition which may result in blurred or no vision in the center of the visual field. [1] Early on there are often no symptoms. [1] Over time, however, some people experience a gradual worsening of vision that may ...
Myopia. Myopia, also known as near-sightedness and short-sightedness, [5] is an eye disease [6][7][8] where light from distant objects focuses in front of, instead of on, the retina. [1][2][7] As a result, distant objects appear blurry while close objects appear normal. [1]
The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and keeping balance. Arizona Eye Model. "A" is accommodation in diopters. The eye can be considered as a living optical device. It is approximately spherical in shape, with its outer ...
Common symptoms present in the different types of leprosy include a runny nose; dry scalp; eye problems; skin lesions; muscle weakness; reddish skin; smooth, shiny, diffuse thickening of facial skin, ear, and hand; loss of sensation in fingers and toes; thickening of peripheral nerves; a flat nose from destruction of nasal cartilages; and changes in phonation and other aspects of speech ...
Trisomy 21. Down syndrome (also known by the karyotype 47,XX,+21 for females and 47,XY,+21 for males) [98] is mostly caused by a failure of the 21st chromosome to separate during egg or sperm development, known as nondisjunction. [91] As a result, a sperm or egg cell is produced with an extra copy of chromosome 21; this cell thus has 24 ...
Vision: different drugs as well as optic compensatory systems and prisms can be used to improve the symptoms of nystagmus or diplopia (double vision). [176] [177] [178] Surgery can also be used in some cases. [179] Walking : dalfampridine (ampyra) is a broad-spectrum potassium channel blocker. It is approved by the FDA to treat walking ...
140,000+ (2018) [ 9 ][ 10 ] Measles (probably from Middle Dutch or Middle High German masel (e) ("blemish, blood blister ")) [ 11 ] is a highly contagious, vaccine-preventable infectious disease caused by measles virus. [ 3 ][ 5 ][ 12 ][ 13 ][ 14 ] Symptoms usually develop 10–12 days after exposure to an infected person and last 7–10 days ...
Propranolol, amitriptyline, topiramate, Calcitonin gene-related peptide receptor antagonists (CGRPs) Medication. Ibuprofen, paracetamol (acetaminophen), triptans, ergotamines. Prevalence. ~15%. Migraine (UK: / ˈmiːɡreɪn /, US: / ˈmaɪ -/) [1][2] is a genetically-influenced complex neurological disorder characterized by episodes of moderate ...