Attention deficit-hyperactivity disorder (ADHD) was associated with a diagnosis of keratoconus in males, according to an Israeli population-based cross-sectional study. Looking at the medical records of over 900,000 military members, those with keratoconus were more likely to be diagnosed with ADHD compared with the general population (OR 1.58, 95% CI 1.38-1.81, P<0.001), and results remained significant after adjustments for age, sex, and intellectual status, reported Margarita Safir, MD, of Shamir Medical Center in Zerifin, and colleagues.