Is keratoconus more severe in pediatric population?

PURPOSE: To compare the ophthalmic parameters and the severity of keratoconus (KC) in pediatrics and adults at the time of initial diagnosis in an Iranian population. METHODS: KC was diagnosed via slit-lamp examination and Pentacam imaging. In a retrospective observational study, consecutive patients were divided into two groups of pediatrics (<18 years old) and adults (>18 years old). Topographic, keratometric, and tomographic parameters, and severity of KC at the time of diagnosis were compared in both groups. Severity of KC was classified according to Amsler-Krumeich classification. RESULTS: One hundred fifty-eight eyes of 158 pediatric patients and 343 eyes of 343 adults with KC were studied. The mean ages of the pediatric and adult patients were 15 ± 1.9 and 22 ± 1.9 years, respectively (p < 0.001). The results revealed that pediatric patients had significantly higher values of anterior and posterior mean, flat and steep keratometry, astigmatism, and maximum elevation and significantly lower central and thinnest corneal thickness (p < 0.05). No significant difference was found regarding sphere, cylinder, manifest refraction spherical equivalent, and uncorrected and best-spectacle corrected visual acuity between the groups (p > 0.05). Pediatric patients had a significantly more severe KC than adult patients according to Amsler-Krumeich classification (p = 0.001). CONCLUSION: Our findings suggest that KC is more severe in pediatrics, hence the fact that they should be closely monitored and intensively treated.