For flatter corneas (<41D), should you fit with smaller GP lenses or larger?

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

For flatter corneas (<41D), should you fit with smaller GP lenses or larger?

Flatter corneas have a larger radius of curvature and offer less central curvature for a fixed lens. To maintain proper clearance and stable alignment on a flatter surface, you increase the lens’s sagittal depth by choosing a larger diameter GP lens. This helps the lens vault over the central cornea with adequate edge lift and tear exchange, rather than bearing or not fitting well. A smaller diameter would risk poor clearance and a less stable fit on a flatter cornea, and iris size doesn’t dictate this choice.

For flatter corneas (<41D), should you fit with smaller GP lenses or larger?

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!

For flatter corneas (<41D), should you fit with smaller GP lenses or larger?

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