Sphere (SPH) and Cylinder (CYL) always have a (+) or (-) sign. On any prescription, PD can be written in different ways: e.g., 62 (Single PD), 33/31 (Dual. O.D. or O.S. When looking at your prescription, these letters may be the first thing you see. · SPH. Next, you'll likely see your spherical correction. Sphere (SPH) on your eyeglass prescription refers to the amount of lens that is needed to bring your vision back to normal. It is measured in diopters and. This means that the eyeball is spherical and has no oblongedness, and consequently has no Cylinder or Axis values. Q: I have BALANCE/BAL on my prescription. Diopters are used to measure the sphere. D (Diopter): This term is the unit used to indicate the focusing power required for the lens of your eye to see clearly.

For far distances: introduce the part of prescription without ADD (Sphere, Cylinder, and Axis) SPH: + = + CYL: AXIS: Left Eye (OI). Sph (sphere) represents how long or short-sighted you are. · Cyl (cylinder) represents the amount of astigmatism present. · Axis indicates the direction of the. **Negative numbers, such as , indicate the lens strength needed to correct shortsightedness. Shortsightedness is when a person can see close things better.** If you have no astigmatism in one or both eyes, your doctor may just write the sphere power alone, or may use placeholders like sph ("sphere") or D.S. (". An example would be if your prescription shows a reading of , it means that you have one diopter of nearsightedness. The larger this number gets, the. If that is the case, you can safely assume that the first set of numbers is for your right eye. Sphere, Cylinder, Axis. O.D., +, + The “Sphere” column. So a + and refractive error is quite modest; your eyesight isn't too bad, as you only need 1 diopter of correction. On the other hand, + and SPH (Sphere) · The power required to correct your nearsightedness or farsightedness. · (+) sign in front of the numbers means you are farsighted, you can see. In other words, if your doctor writes, “” for your sphere, that means “,” “+” means “+,” and so on. Axis is a number between 0 and that isn'. In this example, the "degree" (SPHERE) for the right eye will be (D) and (D) for the left eye. The "astig" (CYLINDER) for the right eye is. For instance, if the prescription says , there's one diopter of nearsightedness, which is quite minor. If it says , there are four-and-a-quarter.

SPH refers to the lens power you'll need to achieve 20/20 (or at least optimal) vision. The number under the sphere column determines the strength of correction. **(Spherical Power) + (Addition) = (This number will be your sphere value for nearsightedness). It's an algebraic sum and, as they're different. SPH (sphere) A + in the box indicates that you are long-sighted which means you find it difficult to see things close to you. A – shows that you find it hard.** Prescriptions change in quarter dioptre steps, i.e. +, +, +, +, + They should have two decimal places but are not always written like that. The left eye is prescribed with a sphere of to correct nearsighted. This eye needs a cylinder of and to correct astigmatism, and an ADD. = · + = + · SPH or sph = SPHERE power; the “overall” power · D.S. · CYL or cyl = CYLINDER power; the amount of astigmatism · X = axis; X 90 means. It represents the amount of lens power required to correct nearsightedness (myopia) or farsightedness (hyperopia). The number associated with the sphere (SPH). OU: Right and left eye; ADD: Addition; SPH: Sphere; CYL: Cylinder; DV: Distance vision; NV: Near vision; VA: Visual acuity; IV. SPH (or sphere) indicates the eyeglass prescription power, or how strong your lenses need to be to correct your vision. If you are nearsighted, the number in.

This indicates the amount of lens power, measured in diopters (D), prescribed to correct nearsightedness or farsightedness. If the number appearing under this. A sphere of + means you have a diopter of for farsightedness. The higher the number, the stronger your prescription needs to be to correct your. SPH refers to the lens power you'll need to achieve 20/20 (or at least optimal) vision. The number under the sphere column determines the strength of correction. Sph (sphere) represents how long or short-sighted you are. · Cyl (cylinder) represents the amount of astigmatism present. · Axis indicates the direction of the. Generally speaking, if your 'Cylinder' is higher than , your eye doctor will most likely advise against using the Spherical Equivalent to order contact.

**Glasses and Contact Lens Prescription Explained - Eyes Explained**