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- Some eye doctors have replaced OD with RE (right eye) and OS with LE (left eye). SPH Sphere, or SPH, is an indicator of the lens strength required to correct nearsightedness, farsightedness, or both. This numerical abbreviation represents the lens power you need to address these vision impairments.
www.visioncenter.org/eyeglasses/prescription/Eye Prescriptions (Meaning of SPH, CYL, AXIS) - Vision Center
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- Making Sense of Your Eye Prescription Chart
- OD vs. OS: One For Each Eye
- Sphere
- Cylinder
- Axis
- Add
- Prism
- How They’Re Measured
- An Example Eye Prescription Chart
- Can Eyeglass Prescriptions Be Used to Buy Contact lenses?
The numbers on your eyeglass prescription relate to the shape of your eyes and strength of your vision. They can help you figure out whether you havenearsightedness,farsightedness or astigmatism— and to what degree. If you know what to look for, you can make sense of the numbers and abbreviations on your prescription chart.
Eye doctors use the abbreviations “OD” and “OS” to denote your right and left eyes. 1. OD is your right eye. OD is short for oculus dexter, the Latin phrase for “right eye.” 2. OS is your left eye. OS is short for oculus sinister, Latin for “left eye.” Your vision prescription may also have a column labeled "OU." This is the abbreviation for oculus...
Sphere indicates the amount of lens power prescribed to correct nearsightedness or farsightedness. Lens power is measured in diopters(D). 1. If the number under this heading comes with a minus sign (–), you are nearsighted. 2. If the number under this heading has a plus sign (+), you are farsighted. The term "sphere" means that the correction for n...
Cylinder indicates the amount of lens power needed for astigmatism. It always follows the sphere power on an eyeglass prescription. The number in the cylinder column may have a minus sign (for correction of nearsighted astigmatism) or a plus sign (for farsighted astigmatism). If nothing appears in this column, you either don’t have astigmatism, or ...
Axis describes the lens meridian that contains no cylinder power to correct astigmatism. If an eyeglass prescription includes cylinder power, it also needs to include an axis value, which follows the cylinder power. The axis is defined with a number from 1 to 180. 1. The number 90 corresponds to the vertical meridian of the eye. 2. The number 180 c...
“Add” is the added magnifying power applied to the bottom part ofmultifocal lenses to correctpresbyopia— the natural farsightedness that happens with age. The number appearing in this section of the prescription is always a "plus" power, even when you don’t see a plus sign. Generally, it will range from +0.75 to +3.00 D and will be the same power f...
This is the amount of prismatic power, measured in prism diopters ("p.d." or a triangle when written freehand), prescribed to compensate for eye alignmentproblems. Only a small percentage of eyeglass prescriptions include a prism measurement. When present, the amount of prism is indicated in either metric or fractional English units (0.5 or ½, for ...
Sphere power, cylinder power and add power always appear in diopters. They are in decimal form and generally are written in quarter-diopter (0.25 D) increments. Axis values are whole numbers from 1 to 180 and signify only a meridional location, not a power. When prism diopters are indicated in decimal form, typically only one digit appears after th...
Still confused? Let's look at an example prescription chart: In the right eye (OD), the eye doctor prescribed: 1. -2.00 D spherefor the correction of nearsightedness. 2. No cylinder power or axis, which means no astigmatism is present. This doctor chose to write "SPH," to confirm the right eye is being prescribed only spherical power. Some doctors ...
No, you cannot use your glasses prescription to buy contact lenses. An eyeglass prescription only works for the purchase of eyeglasses. It does not contain certain information that is crucial to acontact lens prescription. That information can only be obtained through a contact lens fitting, an additional procedure that can be performed during your...
- Right and Left Eye. In a typical prescription (like the one above), you’ll find these abbreviations on the left side: O.D. This is short for oculus dexter, and is your right eye.
- Sphere (SPH) The sphere column is often abbreviated as SPH. This is the lens power needed to fix your vision. A minus sign (₋) next to the number means nearsightedness (you see better up close and need distance correction) and a plus sign (₊) is farsightedness (you see better far away and need near correction).
- Cylinder (CYL) The cylinder number is how much astigmatism you have, if any. This is when part of the cornea has a different curve. Normally, an eye is shaped like a basketball—rotated any direction, the curve stays the same.
- Axis. This number tells you where the astigmatism is on the cornea. The axis—written in degrees between 1 and 180—indicates which way the astigmatism lines up.
Dec 3, 2022 · 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 suggests that you need a spherical correction for your sight. An SPH number indicates if you are farsighted or nearsighted.
Feb 21, 2019 · Sphere (SPH) Sphere indicates the amount of lens power, measured in diopters (D), prescribed to correct nearsightedness or farsightedness. If the number appearing under this heading has a minus sign (–), you are nearsighted; if the number has a plus sign (+) or is not preceded by a plus sign or a minus sign, you are farsighted.
What does SPH mean on my glasses prescription? The SPH on your glasses prescription stands for sphere. Sphere refers to the power of your lens (measured in dioptre units) to correct the degree of short or long sight you have.
The sphere (Sph) specifies the strength of lens required to correct your focus - a plus sphere to correct long-sightedness (hyperopic - difficulty focusing on close objects) and a minus to correct short sightedness (myopia - difficulty focusing on distant objects.)
