I have a power of R-1.5, -1.5 cyl, 20 axis and L-3.0, -2 cyl, 160 axis. But I notice while from right eye when I see mild white light flashes from screen but is good while reading from paper and also little blur near and far both from the same eye. Tested my eye but having same problem no change in power. What can be the cause? Can it be Keratoconus? Or something else. My retina is fine. I got tested for that too. I am just of 22 years.