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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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How to correct refraction in eyes?

Hello .. patient with refraction RE -2.5 +5.00 105 Diameter 8.68 mm k 1 = 38.84 Diameter 7.76 mm k 2 = 43.49 how to calculate power of contact lens?
Thu, 26 Jun 2014
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Ophthalmologist 's  Response
Hello
I reviewed the prescription.
It shows combination of spherical and cylindrical power.
Hence this requires use of toric contact lens.
The power of the contact lens can be obtained by the conversion table which shoes the amount of power to be added or subtracted depending on the adjustment by vertex distance.

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