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how to read contact lens prescription on box?

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asked May 19 in Health by Simon

2 Answers

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OD = Right
OS = Left

Power (sphere): the strength or amount of correction.
(usually number between -20.00 and +20.00)
Sign (-) or (+): very important!
( minus "-" for nearsighted & plus "+" for farsighted).
BC (base curve): determines the curvature of a lens,
(a number between 8.0 and 9.3).
Diameter: diameter or size of lens,
(a number between 13.0 and 15.0).
Cyl - Cylinder: correction for astigmatism. Toric lenses only,
(usually a number between -0.50 and -4.75).
Axis: correction for astigmatism. Toric lenses only,
(a number between 0 and 180).
Toric Lenses: Toric lenses include correction for astigmatism.
answered May 19 by Tad Dubious
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You can find your contact lens details in several places, on the prescription from your eye doctor, on the contact lens box and also on the actual contact lens recepticle.

This is all the information that your contact lens provider will need so you can purchase the correct contact lenses

OD = Right Eye
OS = Left Eye
Brand Name (e.g. Acuvue)
BC / Base Curve (a number between 8.0 and 10.0)
DIA / Diameter (a number between 13.0 and 15.0)
Power / Sphere / Rx (a number between -20 and +20)

For astigmatic patients, they will also need:
Cylinder (a number between -4.00 and +4.00)
Axis (a number between 0 and 180)
Cylinder and Axis are usually separated by "X" and read as "times"

A regular prescription would look like this:

OS Brand Name: eg: Frequency 58
OS BC: 8.8
DIA: 14.4 
POWER or SPHERE: -2.50

OD Brand Name: eg: Optima FW
OD BC: 8.4
DIA: 14.0
POWER or SPHERE: -2.75

prescription box

A prescription for astigmatism would look like this:

OS Brand Name: eg. Acuvue Toric
OS BC: 8.8 
DIA: 14.4 
POWER or SPHERE: -2.50
OS CYL & AXIS :- 1.25 X 180

OD Brand Name: eg. Focus Toric
OD BC: 8.7 
DIA: 14.0
POWER or SPHERE: -4.50
OD CYL &a OD CYL & AXIS: - 0.75 X 95

prescription box astigmatism
answered May 19 by himachi

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