![]() ![]() You can learn more about how we ensure our content is accurate and current by reading our editorial policy. Healthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. The strength of the lenses can vary for each eye. Double PD is made up of TWO measurements: the distance between the right pupil and the bridge of the nose and then the distance between the left pupil and the bridge of the nose. It will be just one number, such as 64mm. The more nearsighted you are, the higher the numbers will be.įor instance, a lens prescription of -5.00 is a stronger prescription than -2.00. Single PD refers to the total distance, in millimeters, between the center of one pupil to the center of the other pupil. The lenses in your eyeglasses will correct the bend in the light and help you see distant objects more clearly.įor a nearsighted prescription, the strength of the lenses will be marked with a minus sign. This can cause your distance vision to be fuzzy. Nearsightedness can also happen if the cornea of your eye is too curved.ĭue to this increased distance, light rays fall in front of your retina (a light-sensitive structure that sends signals to your brain) instead of on it. With nearsightedness, your eye is usually elongated, with too much distance between the cornea at the front of your eye and the retina at the back of your eye. If you’re nearsighted, you can see objects that are close clearly, but objects that are farther away will look blurry. Nearsightedness, or myopia, is a common refractive disorder. What to know about nearsighted prescriptions
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