Certified Ophthalmic Assistant Practice Exam

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What is the spherical equivalent of +2.00 +5.00 X 180?

  1. +3.50

  2. +4.50

  3. +5.50

  4. +6.50

The correct answer is: +4.50

The spherical equivalent is calculated by combining the spherical power with half of the cylindrical power. In this case, the spherical power is +2.00, and the cylindrical power is +5.00 at axis 180 degrees. So, the calculation would be: +2.00 + (+5.00/2) = +2.00 + (+2.50) = +4.50 Therefore, the spherical equivalent for +2.00 +5.00 X 180 is +4.50, which corresponds to option B.

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