I am currently in late 20's and I have been always -4.00 and -5.00 from early 20's till 25 or so. Then the change started to happen in last two years: My early 20~Early 2014 (for about 5 years): OD -4.00 OS -5.00 Late 2014: OD -4.75 OS -6.00 Cyl +0.25 Axis 50 Now OD -5.75 Cyl +0.50 Axis 102 OS -6.50 Cyl +0.75 Axis 48 Hum... Should I be concerned? I do notice that my eyes are more sensitive to light than before.