How to read and enter prescription
How to understand your prescription and enter your prescription on our webpage?
An eyeglass prescription is a written order by an optometrist, ophthalmologist, orthoptist for eyeglasses. It specifies the refractive power to which the eyeglasses are to be made in order correct blurred vision due to refractive errors, including myopia, hyperopia, astigmatism, and presbyopia. Eyeglass prescription issued by different doctors may differ in format, but they somewhat look like the following 4 samples. You may choose the sample which is close to yours in hand and read the notes after each sample.
Explaination:
- 1. SRX= Spectacle Prescription, the prescription for your eyeglasses.
- 2. SPH= Sphere=Spherical, is the strength of your prescription, bears sign “+” or “-”, “+” means farsightedness and presbyopia, “-” means nearsightedness. In this sample, the sign is “-”.
- 3. CYL= Cylinder= Cylindrical, is the diopters degree of the astigmatism. This number also has “+” or “-” signs. Please note that the signs before CYL numbers are critical in accurately fitting your lenses. Make sure what your sign is.
- 4. AXIS, is a number between 0 and 180 degrees, and means the orientation of your astigmatism. There is no sign before this number.
- 5. ADD= Near Addition, means the power strength to be added to the SPH number for making single vision reading glasses or bifocal and progressive eyeglasses. This prescription shows no numbers under “ADD”, which means this patient is nearsighted only.
- 6. O.D. = Right Eye
O.S. = Left Eye
- 7. P.D. distance = Pupillary Distance, in this sample, the PD is 62, which is the normal number for most of the adults.
- 8. Decimal points in the numbers of this prescription are missing. In this case, “-050”= “-0.50”, “-175”= “-1.75”. When entering numbers in Firmoo.com, please use the equivalent numbers with decimal points. Besides the decimal points, please enter the correct signs before numbers when applicable.
Explaination:
- SRX= Spectacle Prescription, the prescription for your eyeglasses;
- SPH= Sphere=Spherical, is the strength of your prescription, bears sign “+” or “-”, “+” means farsightedness and presbyopia, “-” means nearsightedness. In this sample, the sign is “-”.
- CYL= Cylinder= Cylindrical, is the diopters degree of the astigmatism. This number also have “+” or “-” signs. Please note that th sign before CYL numbers are critical in accurately fitting your lenses. Make sure what your sign is.
- AXIS, is a number between 0 and 180 degrees, and means the orientation of your astigmatism. There is no sign before this number.
- ADD= Near Addition, means the power strength to be added to the SHP number for making single vision reading glasses or bifocal and progressive eyeglasses. There are no numbers under “ADD”, which means this patient is nearsighted.
- O.D. = Right Eye
O.S. = Left Eye
- P.D. distance = Pupillary Distance, in this sample, the PD is 62, which is the normal number for most of the adults.
- Decimal points in the numbers of this prescription are missing. In this case “-050”= “-0.50”, “-175”= “-1.75”. When entering numbers in Firmoo.com, please use the equivalent numbers with decimal points. Besides the decimal points, please enter the correct signs before numbers when applicable.
Explaination
- Rx= Prescription, the prescription for your eyeglasses;
- Spherical= SPH, is the strength of your prescription, bears sign “+” or “-”, “+” means farsightedness and presbyopia, “-” means nearsightedness. In this sample, the sign is “-”.
- Cylindrical= CYL, is the diopters degree of the astigmatism. This number also have “+” or “-” signs. Please note that th sign before “Cylindrical” numbers are critical in accurately fitting your lenses. Make sure what your sign is.
- AXIS, is a number between 0 and 180 degrees, and means the orientation of your astigmatism. There is no sign before this number.
- ADD= Near Addition, means the power strength to be added to the “Spherical” number for making single vision reading glasses or bifocal and progressive eyeglasses. In this prescription, the “ADD” numbers are put under the “N.V.”(Near Vision). Some of the doctors may write one number with sign such as “+2.00” in the middle of the space under “N.V.”, which means your both eyes have the same ADD numbers.
- O.D. = Right Eye
O.S. = Left Eye
D.V.= Distance Vision
N.V.= Near Vision
- P.D. distance = Pupillary Distance, in this sample, the PD is written as “62/59”, which means “62” is the “ Far PD”, and “59” is the “Near PD”
- The numbers in this prescription are with decimal points, so just enter numbers with decimal and with correct signs +/- in Firmoo.com.
Explaination:
- 1. This prescription is issued in vertical format, while most the prescriptions are of horizontal ones.
- 2. This prescription use the plain English with no abbreviations from Latin.
- 3. Sphere= SPH, is the strength of your prescription, bears sign “+” or “-”, “+” means farsightedness and presbyopia, “-” means nearsightedness. In this sample, the sign is “+”.
- 4. Cylinder= CYL, is the diopters degree of the astigmatism. This number also has “+” or “-” signs. Please note that the signs before CYLINDER numbers are critical in accurately fitting your lenses. Make sure what your sign is. In this sample, the sign is “-”.
- 5. Axis, is a number between 0 and 180 degrees, and means the orientation of your astigmatism. There is no sign before this number.
- 6. Add= Near Addition, means the power strength to be added to the Sphere number for making single vision reading glasses or bifocal and progressive eyeglasses. In this prescription, the “Add” numbers are put under the “Add” spaces. Some of the doctors may write one number with sign such as “+2.00” in the middle of the space under “Add.”, which means your both eyes have the same Add numbers.
- 7. PD= Pupillary Distance, in this sample, the PD is written as “62/59”, in which “62” is the “ Far PD”, while “59” is the “Near PD”
- 8. In writing the decimals in this prescription, all the decimals are written with the decimal points being clearly there. You can just enter all the numbers as shown on the prescription sheet in our webpage.
