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The effect of high altitude on the visual system
Journal of the Royal Army Medical Corps
|April 7, 2011
Summary
Exposure to increased ultraviolet light and hypoxia at high altitudes can harm the visual system. This article reviews how altitude and UV exposure impact vision, causing immediate or delayed visual problems.
Area of Science:
- Ophthalmology
- Aerospace Medicine
- Environmental Health
Background:
- High altitude environments present unique challenges including increased ultraviolet (UV) radiation and hypoxia.
- Physiological adaptations to altitude can further influence the body's response to environmental stressors.
- The visual system is particularly vulnerable to these combined factors.
Purpose of the Study:
- To provide a comprehensive overview of the potential adverse effects of altitude-related factors on the visual system.
- To elucidate the mechanisms by which UV exposure and hypoxia impact ocular structures and functions.
- To discuss the range of visual disturbances that may occur following exposure.
Main Methods:
- Literature review of studies investigating visual system changes at altitude.
- Analysis of physiological responses to hypoxia and UV radiation relevant to vision.
- Synthesis of information on both acute and chronic visual impairments.
Main Results:
- UV exposure can lead to conditions like photokeratitis and pterygium.
- Hypoxia at altitude is associated with visual field defects, altered color vision, and optic nerve changes.
- Altitude acclimatization can exacerbate or mitigate certain visual effects.
Conclusions:
- Combined exposure to UV light and hypoxia at altitude poses significant risks to visual health.
- Understanding these risks is crucial for preventative measures and management of visual disturbances in high-altitude populations.
- Further research is needed to fully understand long-term visual consequences and develop targeted interventions.
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