A patient has an on-K GP lens. The GP trial power is -3.00 D, but the patient's prescription is -6.00 D. What is the over-refraction after vertex conversion?

Explore the Gas Permeable Contact Lenses Test. Dive into lens anatomy, verification, and selection. Study multiple-choice questions and access detailed explanations. Gear up for success!

Multiple Choice

A patient has an on-K GP lens. The GP trial power is -3.00 D, but the patient's prescription is -6.00 D. What is the over-refraction after vertex conversion?

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