We report an important update to the paper, Harthan JS, Gelles JD, Block SS, et al., Prevalence of Keratoconus Based on Scheimpflug Corneal Tomography Metrics in a Pediatric Popula-
tion From a Chicago-Based School Age Vision Clinic. Published in Eye and Contact Lens in 2024. 1 The original paper studied school age children ages 3 to 18 years and is significant in that the diagnosis of keratoconus was made using modern tomographic parameters and stressed the importance of early diagnosis. Earlier papers on the prevalence of disease commonly used anterior surface topography, which while specific, lacks sensitivity as it identifies disease in the later stages when anterior surface changes occur. This often underestimates the prevalence and does not allow identification of early or subclinical disease where intervention (e.g., corneal crosslinking) can prevent vision loss.
