- #Spectacle rx meaning how to#
- #Spectacle rx meaning full#
- #Spectacle rx meaning plus#
- #Spectacle rx meaning series#
Though the prescriptions may appear similar, they will differ in strength and are not interchangeable. The simple reason is because contact lenses sit directly on your eyes, while eyeglasses are held in front of your eyes. Unfortunately, contact lens and eyeglass prescriptions are different. Q: Can I use my contact lens prescription when ordering eyeglasses? If you have two ADD values in your prescription (ADD +2.00 and ADD +2.25 PAL), the ADD value +2.00 should be used for both eyes of bifocal while ADD value +2.25 should be used for both eyes of progressive. It does not change the size of that portion of the lens. Because of the limited reading area of a progressive lens design, the Add portion of a prescription is increased by a quarter of a diopter (typically) to compensate by increasing the size of the image.
Q: I have PAL （progressive addition lens ）on my prescription. This means that the eyeball is spherical and has no oblongedness, and consequently has no Cylinder or Axis values.īalance indicates that the eye for which the designation is made, is not sighted, and that the same numbers should be entered in both eyes, in order to have the lenses matched in appearance and weight. If the optometrist wrote "DS" or "Sph" or "Spherical" in the Cylinder space, it indicates no correction and should be entered as 0 on the order form. Q: I have SPHERE/SPH /S/DS under CYL on my prescription Just leave it as a zero or Plano when entering the prescription on the order form on our website. If there is "Plano" or "PL" in the SPH section of an Rx, it means no nearsighted or farsighted correction is needed. Q: I have PLANO /PL under SPH on my prescription When placing the order, please click "Two PD numbers" to enter your dual PD. Dual PD appears in the following format: "31.5/31.5". The average PD range for adults is 57-72 mm and for kids is about 43-58 mm.Ī dual PD would be provided with two numbers and would appear and is the measurement of each pupil center to the center of the bridge of the nose, in millimeters. Generally speaking, the PD numbers for adults stays the same. You can normally find your PD on your prescription. For people with strong prescription, this is especially important. Your PD is an important factor and tells you where you look through the lens of your glasses and should be as accurate as possible. PD stands for Pupillary Distance, which is the measurement from the center of one pupil to the center of the other. Prism: This is the amount of prismatic power, measured in prism diopters ("p.d." or a superscript triangle when written freehand), prescribed to compensate for eye alignment problems.īase Direction indicates where the thickest edge of the prism will be: BU (for base up), BD (for base down), BI (for base in toward the nose), or BO (for base out toward the ears).
#Spectacle rx meaning how to#
If your prescription doesn't have your PD on it, don’t worry, we have a tutorial that teaches you how to measure your PD yourself. PD: This number indicates the distance from the center of one pupil to the center of the other, and is an important number for lens customization. It may also be written as a large, positive number, across both the OD and OS lines of your prescription. It is typically the same positive number, for both eyes, although it may be written only once on your prescription. Just have one ADD number on my prescription? That’s because for most people, ADD will be the same for both eyes. If you need reading, intermediate, bifocal or multifocal, or progressive lenses, this should be listed in your prescription. From 1 to 180 degrees.ĪDD is an additional strength for your lens for reading or upclose work. The AXIS represents the orientation or angle of your astigmatism. The higher the number, the more astigmatism you have.
CYL or cylinder is the degree of how flat your eye is. Astigmatism is where the eye is not completely spherical but shaped more like a football.
#Spectacle rx meaning full#
If you have astigmatism, CYL and AXIS will be full in your prescription. The larger the number, the stronger the prescription you needed to correct your vision.
#Spectacle rx meaning plus#
There will be a plus sign for farsighted and negative sign for nearsighted - followed by a number. This indicates the amount of lens strength. SPH stands for sphere or spherical power. OD means 'right eye' and OS means 'left eye'. Doctors use this to tell you that you need single vision lens instead of bifocal or progressive lens. Doctors usually use this to distinguish different usage. NV stands for near vision for reading use or computer use.ĭV stands for distance vision for constant wear or daily use. Let's take a moment to decipher and understand what’s on your prescription. It makes ordering prescription glasses online challenging and overwhelming.
#Spectacle rx meaning series#
When you leave your eye doctor's office and look at your prescription, it may seem like an unrecognizable series of numbers and abbreviations.
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