Description, Causes and Risk Factors:
Photokeratitis is a medical condition that is characterized by intense ultraviolet damage to the eyes and may cause by natural or artificial source of ultraviolet light. A characteristic symptom of the condition is pain, one which may describe to being similar to having sand in one's eyes.
Any intense exposure to UV light can lead to photokeratitis. Common causes include welders who have failed to use adequate eye protection such as an appropriate welding helmet or welding goggles. This is termed arc eye, while photokeratitis caused by exposure to sunlight reflected from ice and snow, particularly at elevation, is commonly called snow blindness. It can also occur due to using tanning beds without proper eyewear. Natural sources include bright sunlight reflected from snow or ice or, less commonly, from sea or sand. Fresh snow reflects about 80% of the UV radiation compared to a dry, sandy beach (15%) or sea foam (25%). This is especially a problem in polar region and at high altitudes, as with every thousand feet (approximately 305 meters) of elevation (above sea level), the intensity of UV rays increases by four percent.
Photokeratitis can be prevented by using sunglasses or eye protection that transmits 5-10% of visible light and absorbs almost all UV rays. Additionally, these glasses should have large lenses and side shields to avoid incidental light exposure. Sunglasses should always be worn, even when the sky is overcast, as UV rays can pass through clouds.
Eye pain and redness.
Seeing halos around lights.
Irritation and foreign body sensation.
Diagnoses include Standard slit lamp examination with fluorescein in suspected cases of photokeratitis.
The pain may be temporarily alleviated with anaesthetic eye drops for the examination, however it is not used for continued treatment as anesthesia of the eye interferes with corneal healing, and may lead to corneal ulceration and even loss of the eye. Cool, wet compresses over the eyes and artificial tears may help local symptoms when the feeling returns. Nonsteroidal anti-inflammatory drug (NSAID) eye drops are widely used to lessen inflammation and eye pain, but have not been proven in rigorous trials. Systemic (oral) pain medication is given if discomfort is severe. Healing is usually rapid (24-72 hours) if the injury source is removed. Further injury should be avoided by isolation in a dark room, removing contact lenses, not rubbing the eyes, and wearing sunglasses until the symptoms improve.
NOTE: The above information is educational purpose. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition.
DISCLAIMER: This information should not substitute for seeking responsible, professional medical care.
According to the latest study, published in the European Journal of Public Health, regular use of probiotics may cut the necessity for antibiotics and help decrease the rise of antibiotic resistance. Having performed the analysis of the data, collected from recent...
A team of scientists from the University of Pennsylvania claims that they managed to patch up permanent teeth in children with the help of stem cells taken from baby teeth. The team performed the clinical trial that involved 30 children treated with the new method and...
It is very entertaining to be a sport fan. There is a big variety of sport games that are extremely interesting to follow. Moreover, it is always fun to anticipate the score and watch the enthusiasm live. One of the benefits of being sports fan is using different...read more
A new study of nearly 18,000 participants found that those with high fitness at middle age were significantly less likely to die from heart disease in later life, even if they were diagnosed with depression. Doctor's Tips: How to Stay Fit While Treating Depression Dr....read more
The warm ups are supposed to increase body temperature and blood flow so the muscles and surrounding joints become more responsive and prepared for physical activity. Although there’s a neurological element to warm-ups, most research focuses on the physiological...read more