Eyeglasses prescription changed, but contact lenses stayed the same?

Question

For seven years my prescription for my glasses has been -4.0 in each eye, and the same for my contacts. At my last eye exam the doctor changed my left contact lens to -4.25 and my left eyeglasses lens to -3.75. I received a trial pair of contact lenses, which made it difficult to read because the left eye was too strong. The doctor did a re-check, and he put me back in the -4.0 contact lenses for each eye, but left the eyeglasses at -3.75 and -4.0. I don't have any problems reading or seeing distances with my current glasses. I want to order prescription sunglasses elsewhere, during a sale from 4/30-5/5, but I am not sure that my regular glasses from the doctor will be in, as they were special order, and I am afraid that this prescription will be wrong and I will be out the money for the lenses. Is it normal to have a change like this?

Answer 1

Maybe you should tell him of your concern,it's your money afterall, and see if you can get a trial -3.75 in a contact lens to try for that eye, and you will be able see how the vision will be in the glasses.

It is a bit strange that you would have a -4.00 in the contact but only a -3.75 in the glasses. That 0.25 difference, if it is too weak will give you a bit of an imbalance that will probably bother you.

That is providing of course that you are very sure your glasses are just a spherical number and there is no 0.50 correction for astigmatism in that eye...if there is, that would make the contact have to be 0.25 stronger than the glasses.

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So it is a - 3.75 - 0.50 X some axis number..in both ?