For steeper corneas (>45D), should you fit with smaller GP lenses or larger?

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Multiple Choice

For steeper corneas (>45D), should you fit with smaller GP lenses or larger?

Explanation:
When a cornea is steep, its curvature is tight and the apex sits higher on the eye. Using a smaller GP lens diameter helps the lens sit more centrally on that steep apex and reduces the amount of peripheral bearing and lid interaction that can occur with a larger lens. The smaller lens covers a smaller portion of the cornea and sclera, which improves centration and stability on a steep curvature. If you tried a larger diameter on a steep cornea, the lens is more likely to ride onto the sclera and edge lift or decenter, making the fit less stable. So, for steeper corneas, starting with a smaller GP lens diameter tends to give a better, more predictable fit.

When a cornea is steep, its curvature is tight and the apex sits higher on the eye. Using a smaller GP lens diameter helps the lens sit more centrally on that steep apex and reduces the amount of peripheral bearing and lid interaction that can occur with a larger lens. The smaller lens covers a smaller portion of the cornea and sclera, which improves centration and stability on a steep curvature. If you tried a larger diameter on a steep cornea, the lens is more likely to ride onto the sclera and edge lift or decenter, making the fit less stable. So, for steeper corneas, starting with a smaller GP lens diameter tends to give a better, more predictable fit.

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