Prescription
| Entering or selecting the correct numbers or information for your order |
| Entering or reading your prescription is easy. The top line of the prescription is for the right eye and the bottom line is for the left eye. OD, Oculus Dexter or the right eye OS, Oculus Sinister or the left eye |
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SPH, Sphere or Spherical - refractive error correction of the eye
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| PL or Plano means 0, just leave the column as is and do not select any number - 25 or - 0.25, select - 0.25 in the column - 100 or - 1.00, select - 1.00 in the column + 1000 or + 10.00, select + 10.00 in the column Please note the + ( Positive ) or - ( Negative ) sign in front of the numbers, selecting it incorrectly will result in a wrong prescription entry and you might not be able to see with the glasses. Note that there is an extra charge for sphere correction greater than + 4.00 or stronger than - 8.00 |
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CYL, Cylinder or Cylindrical - astigmatism correction.
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| DS, SPH or Sphere means 0, just leave the column as is and do not select any number in the CYL and AXIS column - 25 or - 0.25, select - 0.25 in the column - 100 or - 1.00, select - 1.00 in the column + 300 or + 3.00, select + 3.00 in the column Note that there is an extra charge for cylinder correction greater than 2.00  Sample of cylinder written as SPH  Sample of cylinder written as DS |
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AXIS
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| 005 or 5, select the number 5 in the AXIS column 098 or 98, select the number 98 in the AXIS column 166, select the number 166 in the AXIS column |
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Prism
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| This column is usually empty or there is no number in the column. If in case you do have prism correction please check the " I have Prism " box. There is an extra charge for Prism correction. |
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Base
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| Enter or select this information only when you have a Prism correction, otherwise leave it blank or at 0. BI or IN, select IN in the column. BO or OUT, select OUT in the column. BU or UP, select UP in the column. BD or DOWN, select DOWN in the column. |
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ADD
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| ADD power, only enter this when you select or want READING, COMPUTER, BIFOCALS or PROGRESSIVE eyeglasses. Sometimes the ADD number is referred as NV + 250 or + 2.50, select the + 2.50 in the column |