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Blurred vision is an ocular symptom where vision becomes less precise and there is added difficulty to resolve fine details. Temporary blurred vision may involve dry eyes, eye infections, alcohol poisoning , hypoglycemia , or low blood pressure .
The extent of blurry vision can be assessed by measuring visual acuity with an eye chart. Blurry vision is often corrected by focusing light on the retina with corrective lenses . These corrections sometimes have unwanted effects including magnification or reduction, distortion, color fringes, and altered depth perception.
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Eye strain, also known as asthenopia (from astheno- 'loss of strength' and -opia 'relating to the eyes'), is a common eye condition that manifests through non-specific symptoms such as fatigue, pain in or around the eyes, blurred vision, headache, and occasional double vision. [1]
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 affect one or both eyes. [1]
Extraction point: the location designated for reassembly of forces and their subsequent transportation out of the battle zone. Fabian strategy: avoiding pitched battles in order to wear down the enemy in a war of attrition. Fighting withdrawal: pulling back military forces while maintaining contact with the enemy. File: a single column of soldiers.
While the common theories regarding vision issues during flight focus on cardiovascular factors (fluid shift, intracranial hypertension, CO 2 exposure, etc.), the difficulty comes in trying to explain how on any given mission, breathing the same air and exposed to the same microgravity, why some crewmembers have vision issues while others do ...
The blurred vision usually resolves within 10 weeks but individuals are often left with less vivid color vision, especially red, in the affected eye. [citation needed] A systemic intravenous treatment with corticosteroids may quicken the healing of the optic nerve, prevent complete loss of vision and delay the onset of other symptoms. [citation ...