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Observational Study
. 2024 Mar 1;50(3):121-125.
doi: 10.1097/ICL.0000000000001072. Epub 2024 Feb 7.

Prevalence of Keratoconus Based on Scheimpflug Corneal Tomography Metrics in a Pediatric Population From a Chicago-Based School Age Vision Clinic

Jennifer S Harthan  1 , John D Gelles, Sandra S Block, William Tullo, Andrew S Morgenstern, Becky Su, Daniel Chung, Austin Yu, Steven A Greenstein, Peter S Hersh, Steven Barry Eiden
Affiliations
Observational Study

Prevalence of Keratoconus Based on Scheimpflug Corneal Tomography Metrics in a Pediatric Population From a Chicago-Based School Age Vision Clinic

Jennifer S Harthan et al. Eye Contact Lens. .

Abstract

Purpose: Determine the pediatric prevalence of keratoconus (KC) using Scheimpflug corneal tomography.

Methods: A prospective observational study was done on subjects aged 3 to 18 years at the Princeton Vision Clinic, Chicago, IL. Scheimpflug tomography (Pentacam HR, OCULUS Optikgerate GmbH) scans (Belin/Ambrósio Enhanced Ectasia BAD3) yielded BAD Final D (Final D) and Back Elevation at the Thinnest Point (BETP) measurements. Criteria differentiating non-KC from KC suspects & KC were, Non-KC -Final D <2.00 in both eyes; KC suspect -Final D ≥2.00 and <3.00 in combination with BETP ≥18 μm for myopia and ≥28 μm for hyperopia/mixed astigmatism in at least one eye; and KC -Final D of ≥3.00 with BETP ≥18 μm for myopia or ≥28 μm for hyperopia/mixed astigmatism in at least one eye. Two thousand two hundred and six subjects were recorded, removing duplicate and poor-quality scans leaving 2007 subjects.

Results: Of 2007 subjects, six were classified as KC -prevalence of 1:334, three subjects were KC suspects -prevalence of 1:669, and total prevalence of KC suspects and KC was 1:223.

Conclusion: The prevalence of KC in children is higher than previously reported, emphasizing the importance of sensitive screening for KC at its earliest manifestation as standard in pediatric comprehensive eye examinations.

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Conflict of interest statement

Conflicts of Interest: William Tullo: Medical Director OCULUS Inc. The author has no funding or conflicts of interest to disclose.

References

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