From URL: http://www.visionrx.com/library/enc/enc_prescglasses.asp#read
Below is the article on how to read prescriptions for eye glasses.
After you read the article below, let's see if you can read my latest eyeglasses prescription reading here:
OD: -9.00-1.25x125
OS: -9.00-2.75x70
Nancy
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How do you read an eyeglass prescription?
A prescription for eyeglasses contains the powers for the lenses of each eye (including a reading addition if necessary), information on the separation of the lenses, and sometimes special requirements such as types of tinting, coatings, and so on.
Although each eye doctor writes a prescription in a somewhat different way, it usually contains the same elements. The lens correction for nearsightedness is indicated by a minus sign (-), while a plus sign (+) indicates farsightedness. Cylindrical lenses for astigmatism are designated by cyls., cx, or (x).
Let's analyze the following prescription:
O.D. -3.00 D c/w -2.00 D cx 180
Add: +1.50
PD: 62
* The "O.D." indicates the prescription for the right eye. O.D. stands for the Latin phrase "oculus dexter" and indicates the right eye. "O.S." stands for the Latin phrase "oculus sinister" and indicates the left eye.
* The "-3.00 D" means that the patient has -3.00 diopters of nearsightedness.
* The "c/w" means "combined with."
* The "-2.00 D cx 180" means that the patient also has -2.00 diopters of astigmatism at axis 180 degrees.
* The "Add: +1.50" indicates the power of a bifocal addition.
* The "PD: 62" is a measurement of the distance between the pupils, a necessary measurement for ensuring a proper fit for the glasses.
Below is the article on how to read prescriptions for eye glasses.
After you read the article below, let's see if you can read my latest eyeglasses prescription reading here:OD: -9.00-1.25x125
OS: -9.00-2.75x70
Nancy
----------------------------------------------------------------------------------------------------------------------------
How do you read an eyeglass prescription?
A prescription for eyeglasses contains the powers for the lenses of each eye (including a reading addition if necessary), information on the separation of the lenses, and sometimes special requirements such as types of tinting, coatings, and so on.
Although each eye doctor writes a prescription in a somewhat different way, it usually contains the same elements. The lens correction for nearsightedness is indicated by a minus sign (-), while a plus sign (+) indicates farsightedness. Cylindrical lenses for astigmatism are designated by cyls., cx, or (x).
Let's analyze the following prescription:
O.D. -3.00 D c/w -2.00 D cx 180
Add: +1.50
PD: 62
* The "O.D." indicates the prescription for the right eye. O.D. stands for the Latin phrase "oculus dexter" and indicates the right eye. "O.S." stands for the Latin phrase "oculus sinister" and indicates the left eye.
* The "-3.00 D" means that the patient has -3.00 diopters of nearsightedness.
* The "c/w" means "combined with."
* The "-2.00 D cx 180" means that the patient also has -2.00 diopters of astigmatism at axis 180 degrees.
* The "Add: +1.50" indicates the power of a bifocal addition.
* The "PD: 62" is a measurement of the distance between the pupils, a necessary measurement for ensuring a proper fit for the glasses.
