I have just had an eye test, and whilst the optometrist said my eyes were healthy, there has been a significant prescription change that has me worried and wondered if anyone else had seen this kind of change. I get my eyes tested every 2 or 3 years and I am age 57. Over the past 20 years my prescription has ranged from -0.25 to -0.75 with an astigmatism (cylinder) of -0.5 in both eyes since 2009. My vision has never been that bad that I have felt the need to wear glasses and I also read without glasses although as I am getting older I do struggle now in low light or with very small text. My eyesight does not appear to have changed much in the past three years, I can still read OK and my distance vision more than meets UK DVLA driver standards (I can read a number plate at 20m easily and actually up to 30m). So my concern is that my prescription has suddenly gone from negative to positive and my astigmatism has become significantly worse although I can't really tell any difference in my actual vision. See previous and latest test results below:\n\n2014 Sphere R -0.5 L -0.25 Cylinder -0.5 in both Axis R 115 L 72\n\nToday Sphere R+0.75 L +1.00 Cylinder R-1.25 L -2.00 Axis R 94 L 83\n\nAny thoughts? Is this something I should be concerned about? Could it indicate some other health problems?