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What is scleral topography?

The sMap is such a cool instrument, and it tells us a lot of information.

Normal topographers map the corneal surface only, and give little (if any) data about the shape of the sclera. Since scleral lenses rest on the white part of the eye (the sclera), it makes sense that a scleral topographer could help improve our scleral lens fits.

sMap+OD (1)

The sMap takes a series of 3D images to help create a custom scleral lens

Scleral topographers are able to map the white part of the eye, called the sclera. This is important because this is the area that the scleral lens lands on. It would make sense that using a scleral topographer would give us important information about the shape of the entire eye, not just the cornea.

This particular patient has severe keratoconus in the right eye (K max of over 70 diopters). He complains that a traditional scleral lens does not fit his eye perfectly and he has issues with redness and irritation. With the slit lamp, we observe a small area of elevation inferiorly and a slight area of increased elevation nasally. The nasal elevation is a result of a small pinguecula.

The sMap images take 3 D images of all areas of the eye, and the information is used to create a custom fit scleral lens. Notice how the 3:00 and 6:00 position are slightly "warmer" colors compared the the rest of the sclera. This is due to the elevation of the pinguecula nasally and the small area of elevation inferiorly.

scleral+elevation+right+eye (1)

The sMap generates a scleral topography to show us areas of elevation

This information will be used to create a custom scleral lens, which should vault over those areas perfectly. This results in an extremely accurate scleral lens fit.

Good candidates for custom scleral lenses include patients with extreme eye conditions, such as severe keratoconus, graft-vs-host disease, sjogren’s syndrome, extreme dry eye, glaucoma patients, and patients who have difficulty with their current scleral lenses.

We have been able to help thousands of scleral lens patients with this incredible technology.

So grateful to have this special technology in our office! Book an appointment with our office to see if you would be a good candidate for the sMap!

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