Prescriptions

Contacts vs. Glasses Prescriptions: Are they the Same? Contact lens prescriptions and glasses prescriptions are not the same, although they do have many similarities.  Many of the measurements and values that are needed for a valid prescription are consistent and you’ll still need to get an eye exam from a licensed eyecare professional to make…

In order for us to see, light enters the eye through the cornea, goes through the pupil, and then must focus perfectly on a single pinpoint spot on the retina in the back of the eye called the fovea.  If light does not focus on the fovea, then that eye is “uncorrected” and the point…

Contact Lens Size: “Diameter” Meaning Every valid contact lens prescription for contact lenses includes the following:  Without the diameter measurement of a contact lens, your contact lens seller will have to deem your contact lens Rx as “invalid”.  The diameter of a contact lens is the edge-to-edge measurement of a contact lens.  Disposable soft contacts…

Do Contact Lenses Come in Different Styles? Yes. The most common type of contact lens worn today is the disposable contact lens, but it is not the only type of lens.  In the past, rigid gas permeable and yearly soft lenses were more common, but now are used by very few patients in comparison and…

Base Curve (BC) Meaning The Base Curve of a contact lens is the measurement of the back curvature of the contact lens, the “fitting curve”. Base Curve is the term that is used to describe the caliber of steepness of the lens needed for properly matching the shape of the person’s cornea of their eye.…

If you have heard how important it is to have a valid eye prescription, you may wonder what that actually means. Here’s what a valid eye prescription means and how to ask for one from your eye doctor. According to the FDA.gov website, a valid eye prescription means: “As defined by the Federal Trade Commission…