What does hF stand for on contact lenses?

Answers (2)

• Caroline hill

  05/02/2012

  Eye doctors use the letters ""H"" and ""F"" with contact lenses to identify specific aspects of the prescription. F is an abbreviation for the power of the back of the lens, and H represents a calculation for distance. The information is needed in some cases for custom-made contact lenses. Source:http://www.ehow.com/facts_7335898_mean-contact-lenses_.html

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• chriso1984

  05/02/2012

  HF on contact lenses are used to identify specific aspects of the prescription. F stand for the power of the back of the lens, and H stand for the distance at which the F correction is accurate.

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