how do you convert your contact prescription into an eye glasses prescription?

Answer 1

The contact lens prescriptions are different than an eyeglass prescription. There are a few reasons.

For one, the contact lens sits directly on your eye, as opposed to a few inches away from it, as with eyeglasses. So your spherical RX may vary. Another reason is, you may have a slight astigmatism that is corrected in eyeglasses, but minor astigmatism may not need be corrected with contacts. People with significant astigmatism are prescribed special contacts called "torics" or "gas perm" contacts.

I worked in optical for a total of 10 years before entering the Nursing profession. There are extremely few (if any) opticals that will fill a contact lens Rx for glasses (or vice versa), mostly because it is against the law... but also because they do not want to assume legal liability for a person's abuse of eye health. The same also applies to filing a contact lens rx by presenting the boxes as opposed to presenting a written Rx or calling to have the rx transferred. Most reputable Opticals WILL NOT fill a contact lens order without a written Rx. If they fill it without the written Rx, or change to brands not specified on the Rx, then they assume liability if the contact does not fit or you experience problems with it.

Call the MD that wrote your contact lens Rx. Almost always your Contact lens exam includes and eyeglass exam, as it is the basis of the exam before getting into more detailed measurements for contacts. AS LONG as your Rx is well within expiration date, you should have no problem obtaining the eyeglass Rx from your eye doctor.

Remember eye prescriptions are the same as any other medical prescriptions and are treated as such. If the Rx is expired, you WILL have to get a new exam before a practitioner will be willing to release it.

Answer 2

Go to an eye doctor and have them write you a prescription for eye glasses.

Answer 3

Actually you have to have two different prescriptions for these. Each is different.

Answer 4

The person above is correct but if you want the formula for how to convert here it goes:
Take the power of your Rx (ex -2.50) divide it by [1 - (-0.013)x(the power) Ex -2.50/[1-(-0.013)x-2.50]