Hello...this is due to dry eyes...when we keep reading for long...our blink rate decreases leading to dryness of cornea(anterior black round portion of eye). Measures to prevent this are...take breaks after every 1 hr of study....Blink..blink and blink a lot...do cold compresses....and use good quality lubricating eyedrop(refresh tears) 6 times/day.
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Disclaimer : The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.
Eye and vision
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