Description, Causes and Risk Factors:
A reaction of the cornea to ultraviolet light.
Photokeratitis is a condition, which occurs when the cornea of the eye becomes burned. There are various forms of photokeratitis including snow blindness, Welder's Flash and arc eye.
Ultraviolet light is the most common cause of radiation injury to the eye. The cornea absorbs most UV radiation. UV radiation damage to the corneal epithelium is cumulative, similar to the effects with dermal epithelium.
Photokeratitis often occurs at high altitudes where there is highly reflective snow. It is termed radiation keratitis and snow blindness if it occurs due to reflection from the snow. Sunlight reflecting off of sand and water further increases exposure to ultraviolet (UV) radiation and can cause photokeratitis. The condition may also occur with a solar eclipse or by lightening, although these circumstances are very rare. Artificial sources of UVB rays can also cause photokeratitis. Examples include sun tanning beds, photographic flood lamps, electric sparks and even halogen desk lamps.
Unprotected exposures to the sun or solar eclipses or exposure to the sun on highly reflective snow fields at high elevation can lead to direct corneal epithelial injury.
Hazy vision and temporary loss of vision.
Redness of eyes.
Loss of Vision.
Slit lamp examination with fluorescein in suspected cases of photokeratitis.
Photokeratitis can be very painful and the best way to treat eyes is to place ophthalmic antibiotic drops into the eyes and to keep them closed, preferably with eye patches. Recovery is usually within 48 hours, this is because the surface of the cornea regenerates itself every 24 to 48 hours. Cool wet compresses over the eyes and artificial tears may help local symptoms when the feeling returns. Nonsteroidal antiinflammatory drug (NSAID) eyedrops are widely used to lessen inflammation and eye pain, but have not been proven in rigorous trials.
Prevention always is better than cure and sunglasses with adequate UVB protection, equipped with side shields, are essential.
DISCLAIMER: This information should not substitute for seeking responsible, professional medical care.
A new study, published in the International Journal of Cancer, suggests that drinking hot tea is associated with a higher risk of developing esophageal cancer. The researchers analyzed data from over 50,000 people from the Golestan Cohort Study, a population-based...
According to a new international study, leisurely physical activity, which includes dancing, gardening, or walking, on a weekly basis may cut the risk of death from multiple causes in adults aged 40 and over. The team included researchers from the Shandong University...
In childhood, many of us dreamed of learning to jump high. Now, after years, it became easier - Kangoo Jumps has appeared. This is one of the relatively new, but quickly gaining popularity types of fitness training. There are several advantages of jumpers. ...read more
It is time for us to find the solution how to deal with extra weight which is coming with Christmas and New Year’s celebrations because 2018 is almost over and 2019 is getting closer. The main aim is obviously staying in shape and today will find an effective way to...read more
We know that moderate exercise strengthens our health and makes us more beautiful. But few know about the importance of doing sports as psychotherapy. And, nevertheless, physical loads can save from depressions, reduce anxiety, relieve from professional burnout,...read more