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  2. Toxic and nutritional optic neuropathy - Wikipedia

    en.wikipedia.org/wiki/Toxic_and_nutritional...

    The predominant cause of nutritional optic neuropathy is thought to be deficiency of B-complex vitamins, particularly thiamine [2] (vitamin B 1), cyanocobalamin (vitamin B 12) and recently copper. [3] Deficiency of pyridoxine (vitamin B 6), niacin (vitamin B 3), riboflavin (vitamin B 2), and/or folic acid also seems to play a role. Those ...

  3. Periorbital puffiness - Wikipedia

    en.wikipedia.org/wiki/Periorbital_puffiness

    Periorbital puffiness, also known as puffy eyes, or swelling around the eyes, is the appearance of swelling in the tissues around the eyes, called the orbits. It is almost exclusively caused by fluid buildup around the eyes, or periorbital edema. Minor puffiness usually detectable below the eyes only is often called eye bags.

  4. Optic neuropathy - Wikipedia

    en.wikipedia.org/wiki/Optic_neuropathy

    Undernourished patients often have many vitamin and nutrient deficiencies and have low serum protein levels. However, the optic neuropathy associated with pernicious anemia and vitamin B 12 deficiency can even be seen in well-nourished individuals. Gastric bypass surgery may also cause a vitamin B 12 deficiency from poor absorption.

  5. Spaceflight associated neuro-ocular syndrome - Wikipedia

    en.wikipedia.org/wiki/Spaceflight_Associated...

    In brief: serum concentrations of metabolites of the folate, vitamin B-12 dependent one carbon metabolism pathway, specifically, homocysteine, cystathionine, 2-methylcitric acid, and methylmalonic acid were all significantly (P<0.001) higher (25–45%) in astronauts with ophthalmic changes than in those without such changes. These differences ...

  6. Xerophthalmia - Wikipedia

    en.wikipedia.org/wiki/Xerophthalmia

    The causes are vitamin A deficiency during pregnancy, followed by low transfer of vitamin A during lactation and infant/child diets low in vitamin A or beta-carotene. [ 4 ] [ 5 ] The prevalence of pre-school age children who are blind due to vitamin A deficiency is lower than expected from incidence of new cases only because childhood vitamin A ...

  7. Aerotoxic syndrome - Wikipedia

    en.wikipedia.org/wiki/Aerotoxic_syndrome

    Acute exposure to these decomposition products can result in symptoms such as headaches, nausea, and irritation of the eyes, nose, or throat. [ 10 ] Engine bearing seals are installed to ensure that critical engine bearings are continuously lubricated, and to prevent engine oil from leaking into the compressed air stream.

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