Hi. I've had myopia since 1997, and didn't have any issue other than the usual eye power increase. Eye power is currently -4.5 (R) and -4.75 (L). From 2009 to 2012 I suffered severe sleep loss (able to sleep only 4 hours at night) which resulted in chronic eye strain of the extraocular muscles. Twelve ophthalmologists have checked me and found nothing else wrong with my eyes. Not even astigmatism. But any work (like computer work or even driving) that requires holding the eyes in position for a long time or sleep loss makes my eyes (extraocular muscles) feel sore and they remain sore for two weeks and I also get sharp stabbing pains behind, above and at the sides of my eyeballs. The ONLY cure I've found is to get at least 7 hours of sleep and to close my eyes for 10-20 minutes after each hour of computer use and working for not more than 6 hours everyday. Ever since I've started getting better sleep, my eye strain has been reducing extremely gradually. Being a software engineer, I'm now unable to do the requisite amount of work, so am unable to find employment. Is there a way to prove that I have chronic eye strain? The eye surgeon who has been treating me said she couldn't give me any medical certificate. At least the oblique extraocular muscles are more easily accessible, so shouldn't there be some way to prove it?