With a constant base curve and an ideal diameter, the sagittal height is

With a constant base curve and an ideal diameter, the sagittal height is

• A. Smaller
• B. Larger
• C. Ideal
• D. Unchanged

Answer: (C)

Sagittal height describes how deep the lens sits over the cornea—the vertical distance from the corneal apex to the posterior lens surface. When the base curve is kept constant and the diameter is chosen to be ideal for the eye, the lens vaults the cornea in just the right way, so the posterior surface aligns with the eye’s sagittal contour. That alignment yields an ideal sagittal height: the lens sits with proper clearance, stable centration, and comfortable lid interaction. If the diameter were not ideal, the sagittal height would shift away from this optimal value, leading to a less than ideal fit.

Sagittal height describes how deep the lens sits over the cornea—the vertical distance from the corneal apex to the posterior lens surface. When the base curve is kept constant and the diameter is chosen to be ideal for the eye, the lens vaults the cornea in just the right way, so the posterior surface aligns with the eye’s sagittal contour. That alignment yields an ideal sagittal height: the lens sits with proper clearance, stable centration, and comfortable lid interaction. If the diameter were not ideal, the sagittal height would shift away from this optimal value, leading to a less than ideal fit.