Which of the following lists the three GP lens fit types?

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

Which of the following lists the three GP lens fit types?

Explanation:
In GP lens fitting, thinking in terms of how the lens base curve compares to the corneal curvature is essential. A steep fit means the lens base curve is steeper (shorter radius) than the cornea, so the lens seats tighter with less movement and more central contact. A flat fit means the lens base curve is flatter (longer radius) than the cornea, resulting in a looser seat, more tear under the lens, and more movement. An aligned fit occurs when the lens base curve closely matches the corneal curvature, giving even tear distribution and a stable, balanced fit with little bearing or movement. These three terms—steep, flat, aligned—cover the main ways a GP lens can sit on the eye, while other descriptors like curved, narrow, or wide aren’t standard GP fit types.

In GP lens fitting, thinking in terms of how the lens base curve compares to the corneal curvature is essential. A steep fit means the lens base curve is steeper (shorter radius) than the cornea, so the lens seats tighter with less movement and more central contact. A flat fit means the lens base curve is flatter (longer radius) than the cornea, resulting in a looser seat, more tear under the lens, and more movement. An aligned fit occurs when the lens base curve closely matches the corneal curvature, giving even tear distribution and a stable, balanced fit with little bearing or movement. These three terms—steep, flat, aligned—cover the main ways a GP lens can sit on the eye, while other descriptors like curved, narrow, or wide aren’t standard GP fit types.

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