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The optic nerve is a bundle of millions of fibers in the retina that sends visual signals to the brain. Damage and death of these nerve cells, or neurons, leads to characteristic features of optic neuropathy. The main symptom is loss of vision, with colors appearing subtly washed out in the affected eye.
Impaired judgment, confusion, memory loss and cognitive problems. [52] [53] Euphoria or dissociation [52] Visual impairment [53] A moderate level of hypoxia can cause a generalized partial loss of color vision affecting both red-green and blue-yellow discrimination at an altitude of 12,000 feet (3,700 m). [56] Lightheaded or dizzy sensation ...
Medical, laser and surgery. Sickle cell retinopathy can be defined as retinal changes due to blood vessel damage in the eye of a person with a background of sickle cell disease. It can likely progress to loss of vision in late stages due to vitreous hemorrhage or retinal detachment. [1] Sickle cell disease is a structural red blood cell ...
Rheumatic diseases affect various parts of the body, including the bones, joints, muscles, organs, skin, and eyes. Some, like rheumatoid arthritis and lupus, are autoimmune conditions in which the ...
There are many diseases known to cause ocular or visual changes. Diabetes , for example, is the leading cause of new cases of blindness in those aged 20–74, with ocular manifestations such as diabetic retinopathy and macular edema affecting up to 80% of those who have had the disease for 15 years or more.
6947. Iron-deficiency anemia (or iron deficiency anaemia) is a common anemia that occurs when iron loss (often from intestinal bleeding or menses) occurs, and/or the dietary intake or absorption of iron is insufficient. In such a state, hemoglobin, which contains iron, cannot be formed. [5] Plummer–Vinson syndrome.
Vitreous hemorrhage is the extravasation, or leakage, of blood into the areas in and around the vitreous humor of the eye. [1] The vitreous humor is the clear gel that fills the space between the lens and the retina of the eye. A variety of conditions can result in blood leaking into the vitreous humor, which can cause impaired vision, floaters ...
Vascular occlusion is a blockage of a blood vessel, usually with a clot. It differs from thrombosis in that it can be used to describe any form of blockage, not just one formed by a clot. When it occurs in a major vein, it can, in some cases, cause deep vein thrombosis. The condition is also relatively common in the retina, and can cause ...
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related to: blood disorders that cause fatigue and loss of vision meaning examples in real life