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How to Read a Contact Lens Prescription

Reading a contact lens prescription may seem confusing at first, but with a little explanation it can become quite easy to understand. Looking to learn how to read your eyeglasses prescription? Learn more here now! Here's a brief guide on how to read a contact lens prescription:

            1. Prescription Power (Sphere): The first part of a contact lens prescription refers to the prescription power, which is measured in diopters (D). It indicates the strength of the contact lenses required to correct your vision. The prescription power will be indicated for each eye, and may have a plus (+) or minus (-) sign. It is very important to order your contacts with the exact prescription power your eye doctor has provided.

            2. Base Curve (BC): The base curve refers to the curvature of the contact lens, and it is usually indicated as a number between 8.0 and 10.0. It is important to get the correct base curve for your eye in order for the contact lenses to fit properly.

            3. Diameter (DIA): The diameter refers to the size of the contact lens, and it is usually indicated as a number between 13.0 and 15.0. The diameter should be chosen to fit comfortably on the eye.

            4. Brand Name: The prescription may also include a specific brand name or type of contact lens that is recommended for you.

            5. ADD Power: This number indicates the degree of additional magnifying power needed for reading or close work in multifocal contact lenses. If you do not require bifocals or progressive lenses, this section of your prescription will be left blank.

            6. Axis: This number indicates the orientation of the astigmatism in each eye, measured in degrees from 1 to 180. If you do not require astigmatism contact lenses, this section of your prescription will be left blank.

            7. Additional Information: Some prescriptions may include additional information such as the material of the contact lens, the frequency of replacement, and any special instructions or notes from your eye doctor.

              Here is an example of a contact lens prescription:
              How to Read a Contact Lens Prescription

If you are using an existing, up-to-date contact lens prescription, you can simply order your contact lenses off of the prescription information on your existing contact lens box. It's important to order the same brand and prescription as your eye doctor has provided.

Remember, a contact lens prescription is different from a glasses prescription. Always follow the instructions provided by your eye doctor for the correct use and care of your contact lenses and eyeglasses.


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