What is the range of the ocular sagittal height?

What is the range of the ocular sagittal height?

• A. 2,000-3,000
• B. 3,000-4,000
• C. 2,000-2,500
• D. 2,570-3,710

Answer: (D)

Ocular sagittal height is the vertical space the lens must vault over the cornea when resting on the white of the eye. It’s usually expressed in micrometers (µm), with typical values ranging from about 2,570 to 3,710 µm (2.57 to 3.71 mm). This range reflects normal anatomical variation, ensuring there’s enough clearance to prevent the lens from touching the cornea while avoiding an overly deep vault that could compromise lens stability and tear exchange. Choosing a range within these values aligns with fitting scleral and high-coverage lenses effectively, whereas ranges significantly outside this window could lead to poor fit or comfort.

Ocular sagittal height is the vertical space the lens must vault over the cornea when resting on the white of the eye. It’s usually expressed in micrometers (µm), with typical values ranging from about 2,570 to 3,710 µm (2.57 to 3.71 mm). This range reflects normal anatomical variation, ensuring there’s enough clearance to prevent the lens from touching the cornea while avoiding an overly deep vault that could compromise lens stability and tear exchange. Choosing a range within these values aligns with fitting scleral and high-coverage lenses effectively, whereas ranges significantly outside this window could lead to poor fit or comfort.