I've just found out that I have an astigmatism in my left eye (cylinder -0.50 axis 170.0 if that means anything to anyone). I know that it means an irregular curvature of the eye but what does it mean on a practical level? Does it affect my eyesight or just how my glasses are made? Does anyone know whether, from the above measurements, how severe mine is?
I wear contacts quite comfortably and I have an astigmatism also. Sometimes the lense floats a bit, but it is slight and a quick blink fixes it.
Not a problem at all.
P.S. I'm Tracy too. with No "E" like you! Most people I konw have the E.
You'll have nothing to worry about. See Ethel for the astigmatism levels. The -0.50 is the level of power in your lens. I used to make them! Plano (plane glass) has a zero power, next strength is 0.25, 0.50, 0.75 etc, and they usually go up to 20.00, so you've a very weak prescription. Lenses can be + or -, depending on what your eyesight is like (If you're near or far-sighted). + simply magnifies things, - makes things look smaller.
I have astigmatism in one eye and the optician explained that it meant the lense ( I think it was )of the eye was rugby ball shaped instead of football shaped, but that doesn;t mean i understand the game of rugby, just the opposite in fact.