optics

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Transpose the prescription
-0.75DS/-3.25DCx30 to the toric form with a capstan-form surface which has a +2.50D base curve

  • optics -

    I have transposed the presciption so that cyl is in a plus form
    -4.00DS/+3.25DCx120,
    what do I do next?
    Please help if you can

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