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Where on a contact lens box can I find my prescription printed?
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Dr. Matheson Harris
Ophthalmology
In brief: Know the numbers
Contact lenses have 3-5 numbers that define their prescription.
The spherical power, which is the first number beginning with a + or - sign. If you wear toric lenses for astigmatism, the next 2 numbers will be one starting with a - sign for the power and then a number between 0 and 180 for the axis. Finally, there will be a base curve (bc) around 8.0-9.0 and a diameter number (13-14).

In brief: Know the numbers
Contact lenses have 3-5 numbers that define their prescription.
The spherical power, which is the first number beginning with a + or - sign. If you wear toric lenses for astigmatism, the next 2 numbers will be one starting with a - sign for the power and then a number between 0 and 180 for the axis. Finally, there will be a base curve (bc) around 8.0-9.0 and a diameter number (13-14).
Dr. Matheson Harris
Dr. Matheson Harris
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