sMap3D Corneo-Scleral Topography
sMap3D Corneo-Scleral Topography for Scleral Lenses
Fitting a scleral lens well requires knowing the shape of both the cornea and the sclera. Traditional corneal topographers stop at the edge of the cornea. The sMap3D corneo-scleral topographer measures farther out, capturing the white of the eye where a scleral lens rests.
Dr. DeNaeyer uses sMap3D to measure, analyze, and design custom scleral lenses. The measurements guide a tailored fit rather than relying only on diagnostic lenses and observation.
How the measurement works
A small amount of fluorescein is placed on the eye. The instrument then captures images while you look straight ahead, up, and down. These images are combined into a single map of the ocular surface, covering the area needed for a scleral lens (including data from under the lids).
The resulting map shows the elevation of the cornea and sclera. That information is used to design a lens whose landing zone and clearances match the individual eye. The same data can be used to design free-form lenses, or to refine other custom scleral designs.
Why it matters for fitting
Because the lens rests on the sclera and vaults over the cornea, small differences in scleral shape affect comfort and how evenly the lens sits. Mapping both surfaces before ordering helps:
- Reduce the number of remakes
- Match the lens more closely to irregular or asymmetric eyes
- Address obstacles such as pingueculae or other surface elevations
- Produce a fit that is stable and comfortable
Who benefits
sMap3D mapping is used for most patients being fitted for scleral lenses, including those with keratoconus, post-transplant eyes, corneal trauma, and severe ocular surface disease. It is especially helpful when the sclera is markedly toric or irregular, or when previous scleral lenses have been uncomfortable.
Request an evaluation
The measurement itself is brief and is done in the office. Once the map and other data are collected, the lab can begin production. Lenses typically take 10–14 days, followed by a dispense visit to confirm the fit and teach insertion and removal.
If the lenses are medically necessary, the office will check whether your policy covers specialty contact lens fitting and materials. Financing through CareCredit is available.
To schedule a visit that includes sMap3D mapping and a scleral fitting, call (614) 228-4700 or use our contact form to request a scleral lens evaluation.