what does sph mean for glasses

What does SPH and CYL mean for glasses?

SPH (or Sphere) indicates the eyeglass prescription power, or how strong your lenses need to be to correct your vision. CYL (or Cylinder) indicates astigmatism, a condition where the cornea is irregularly shaped causing blurred or distorted vision. It also tells the lens strength needed to fix it.

Are SPH and CYL the same?

What is the difference between SPH and CYL in a prescription? SPH, or sphere, is the amount of lens power needed to correct nearsightedness or farsightedness, whereas CYL, or cylinder, is the amount of lens power needed to correct astigmatism.

Is SPH good vision?

The number listed under the sphere (SPH) category indicates how strong your vision prescription is. Sphere means that your correction is spherical and is equal in all portions of the eye. In general, the further away a number is from 0, the stronger your prescription and the more vision correction you require.

Does SPH mean power?

Sphere (SPH): The amount of lens power, measured in diopters (D), which corrects nearsightedness or farsightedness. If the number under this heading features a minus sign (–), this means you’re nearsighted; if it has a plus sign (+), this means you’re farsighted.

What is the lowest SPH for glasses?

That means you’re nearsighted, and closer objects appear more clearly.

Sphere (or SPH)
If your number is between -0.25 and -2.00, you have mild nearsightedness.If your number is between -2.25 and -5.00, you have moderate nearsightedness.If your number is lower than -5.00, you have high nearsightedness.

Is SPH or CYL my prescription?

Your optical prescription

Sph (sphere) represents how long or short sighted you are. This can be positive (+) for long sight or negative (-) for short sight. The higher the number, the stronger your lens. Cyl (cylinder) represents the amount of astigmatism present.

How do I read my eye test results?

In general, the further away from zero the number on your prescription, the worse your eyesight and the more vision correction (stronger prescription) you need. A “plus” (+) sign in front of the number means you are farsighted, and a “minus” (-) sign means you are nearsighted.

What is my cyl for glasses?

CYL (or Cylinder) indicates you have a condition where the cornea and/or lens of the eye are irregularly shaped causing blurred vision, in other words, astigmatism. You may find a number listed which helps determine the amount of lens power that is needed to correct astigmatism.

How do I know my reading glasses prescription?

To find the right reading glasses, add the sphere number to the ADD number. In the above example, for the right eye, this would be -2.00 and +1.75, which equals -0.25. For the left eye, add +1.00 and +1.75 to get +2.75. Next, look at the cylinder measurement and the axis measurement.

What does Plano mean for glasses?

If the sphere indicates “Pl” or “Plano” for both eyes, it means that you do not suffer from myopia or hyperopia. A positive sphere indicates hyperopia. People affected by farsightedness have either an eyeball that is too short, or a retina curvature of that is not pronounced enough.

How do I know if my glasses are for distance or reading?

You’ll know if you need distance glasses by looking at the Sphere boxes on your prescription paper for each of your eyes. If they contain negative numbers (-) this means you are myopic and require optical correction for distance vision.

Is SPH and PWR the same?

PWR: Same as sphere. Some prescriptions use PWR instead of SPH. +: Plus sign – A plus sign before a number in the power box shows that you are farsighted.

What is PWR contact lenses?

Read the power (PWR) of the lens strength (it may be different for each eye), measured in diopters. The higher the power number, the stronger the prescription is. Look for a minus sign to indicate nearsightedness (myopia) and a plus sign that indicates farsightedness (hyperopia).

What does add mean for glasses?

ADD stands for the additional lens power needed to make it easier for you to read. This number is seen on prescriptions for reading glasses or the lower portion of bifocal or progressive lenses. Axis is a number between 1 and 180. It indicates exactly where the astigmatism appears on your eye.

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