If sagittal height is constant, the fit would be

If sagittal height is constant, the fit would be

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

Answer: (C)

Sagittal height is the depth of the lens vault over the cornea, especially at the edge, determining how the lens sits relative to the corneal surface and how much tear film is maintained underneath. When this sagittal height is kept constant, the lens maintains a balanced relationship with the cornea: there’s enough central clearance to avoid binding and enough edge support to keep the lens well-centered with good tear exchange. This balance is what clinicians describe as an ideal fit. If the sagittal height varied, you’d tend to see a tighter fit (less movement, potential binding) or a looser fit (more movement, less stable), but with a constant sagittal height the fit remains optimal.

Sagittal height is the depth of the lens vault over the cornea, especially at the edge, determining how the lens sits relative to the corneal surface and how much tear film is maintained underneath. When this sagittal height is kept constant, the lens maintains a balanced relationship with the cornea: there’s enough central clearance to avoid binding and enough edge support to keep the lens well-centered with good tear exchange. This balance is what clinicians describe as an ideal fit. If the sagittal height varied, you’d tend to see a tighter fit (less movement, potential binding) or a looser fit (more movement, less stable), but with a constant sagittal height the fit remains optimal.