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In both toxic and nutritional neuropathy, vision generally recovers to normal over several days to weeks, though it may take months for full restoration and there is always the risk of permanent vision loss. Visual acuity usually recovers before color vision.
Andrés Felipe Robledo Londoño (born 12 December 1986), [1] better known as Reykon " El Líder " " Pel mazo " , is a reggaeton performer from Colombia. [2] He is considered one of the biggest proponents of Latin America's reggaeton music genre. [3] He is from Envigado, Antioquia. [4]
NAION presents as a painless loss of vision, often when awakening, that occurs over hours to days. Most patients lose the lower half of their visual field (an inferior altitudinal loss), though superior altitudinal loss is also common.
With NASA's help, Cass Runyon has found a way to make eclipses accessible to those who are blind or have low vision.
Patients typically present with pain associated with visual loss. CRION is a clinical diagnosis of exclusion, and other demyelinating, autoimmune, and systemic causes should be ruled out.
A person with photic retinopathy may notice an impairment in their vision, for example a spot that does not go away after a reasonable recovery time, or blurring. They may also have eye pain or headaches. Vision impairment is usually in both eyes, but can be in just one.
Functional visual loss (FVL) also known as Functional vision loss or Nonorganic visual loss (NOVL) is a reduction in visual acuity or loss of visual field that has no physiological or organic basis. This disease can come under the spectrum of functional neurological disorder or somatic symptom disorder .
Vitelliform macular dystrophy is an irregular autosomal dominant eye disorder which can cause progressive vision loss. This disorder affects the retina , specifically cells in a small area near the center of the retina called the macula .
Macular sparing is usually a product of unilateral visual cortex lesions, not optic tract or lateral geniculate nucleus lesions in the thalamus. This can help diagnose whether a patient’s visual field loss is due to cortical damage, or optic tract or thalamic damage.
Retinitis pigmentosa (RP) is a genetic disorder of the eyes that causes loss of vision. Symptoms include trouble seeing at night and decreasing peripheral vision (side and upper or lower visual field). As peripheral vision worsens, people may experience "tunnel vision". Complete blindness is uncommon.