Can I use the copy of my eyeglass prescription which was issued by my doctor 3 years

[Juan]

I know my vision doesn't change a lot.Is it safe the use the expired prescription?

[Hayden]

It is suggested that an eye exam should be checked once a year.Though your prescription hasn't changed at all, it may develop other eye diseases. So to keep your eye healthy, you'd better not use the prescription that you got 3 years ago.

[Carlos]

You'd better not, It is strongly suggested to use your eyeglass prescription in the most recent 2 years. Actually Eye Care Professionals (ECPs) suggest an eye exam each six months or one year to detect any possible eye diseases in the earlier stage.