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Ekomi 4.7/5.0

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Optical power

Or optical refractive power is reciprocal of the focal length measured in metres. Expressed in diopters D (DPT). Optical power D1 has an optical system with a focal length of 1m. The greater the curvature of the lens, the greater its refraction ie. the ability to fracture. The optical power of the human eye is 58 D.

Comments Add a question

  • Debbie
    a year ago

    My prescription is +2.00...and I can only see minus... Which is best for me.

  • Leah young
    a year ago

    What size would I get if my daily contact lense power size is -2.25


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