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

Master the Soft Contact Lenses Test with our study materials. Dive into lens selection and learn correct handling procedures. Prepare confidently for your exam!

Multiple Choice

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

Explanation:
Sagittal height is the amount the lens sits up over the cornea. For a fixed base curve, increasing the lens diameter means the lens must cover a wider arc. With the same curvature, a larger arc length raises the posterior surface more, so the sagittal height increases. So the sagittal height is larger. The other options don’t fit because a smaller diameter would reduce sag, “unknown” isn’t correct given the geometric relationship, and “ideal” isn’t a defined outcome of this geometric change.

Sagittal height is the amount the lens sits up over the cornea. For a fixed base curve, increasing the lens diameter means the lens must cover a wider arc. With the same curvature, a larger arc length raises the posterior surface more, so the sagittal height increases. So the sagittal height is larger. The other options don’t fit because a smaller diameter would reduce sag, “unknown” isn’t correct given the geometric relationship, and “ideal” isn’t a defined outcome of this geometric change.

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy