Hi, could you say what is the cause of my blurred vision in my left eye after a short time of about half an hour of computer use. I must say I use the computer quite a lot in my work. But it also happens if I read fine print, like the daily papers for about half an hour continuously.

I only notice the blurred vision when I an finised my work and get up to adjust to distant views. My opthalmologist found nothing wrong, except to prescribe more powerful near vision lenses for me. Dont seem to help.