My Eye Prescriptions

[Nelson Eyeglasses]

from july 2009 my eye examination results for CYL were R: -.75
L: -.50

This years they've decreased to R: -.50
L: -.25

I think this is good but i hear from some opticians that astigmatism does not increase / decrease ( related to my CYL ) can someone help me?

[Helena Eyeglasses]

Astigmatism, which means "no point" in Greek, I think, is a common vision error. In fact, most people have some. When you have astigmatism, light does not focus to a single point in your eye. Instead, it focuses to a blur because the eye is oval or football-shaped. And it can and does change throughout your life, usually for the worse with age. But astigmatism is not a disease and can be compensated for with glasses, contact lenses or refractive surgery.

[Hayden Eyeglasses]

How often (for the average person) does a prescription change? I have a retest next year. Should I expect my prescription to change or should I be asking this question to my Dr.?

[Nickolas Eyeglasses]

prescription will expire within 1 year, so for your new Rx or for your new prescription, you need to ask your eye doctor