Question
180. A 65-year-old welder comes to the emergency department directly from work and complains of bilateral pain and photophobia. The most likely cause is:
| A. |
infrared burn to the eyes.
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| B. |
acute photic keratitis.
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| C. |
ultraviolet absorption by the lens.
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| D. |
secondary anterior uveitis.
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Show Answer
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Correct Answer � B
Explanation
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Answer: B. Acute photic keratitis
Explanation: It is caused by ultraviolet absorption by the cornea. Ultraviolet (UV) irradiation is one of the several environmental hazards that may cause inflammatory reactions in ocular tissues, especially the cornea. UVR exposure in ocular tissues can cause photochemical reactions that result in acute and chronic damage to ocular structures. Chronic effects include basal cell carcinoma and squamous cell carcinoma of the eyelid, pterygium, pinguecula, ocular surface squamous neoplasia, cataracts, climatic droplet keratopathy, age-related macular degeneration, and uveal melanoma. An acute ocular effect of UVR is photokeratitis. Photokeratitis represents the acute corneal response to UVB and UVC radiation exposure. Traveling is considered to have a more acute effect.
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