A four-year-old girl accompanied her eightyear-old brother to an eye clinic in 2000 where he was diagnosed with keratoconus. Corneal tomography (Orbscan, Bausch & Lomb, Rochester, NY, USA) was also performed on the four-year-old (at the request of her parent) given the strong family history of keratoconus in her father and sibling. She did not have any significant medical history and her parents had not noticed any eye rubbing or problems with her vision. Visual acuity and slitlamp examination were not performed. Corneal tomography demonstrated bilateral inferior steepening with thin corneas (thinnest pachymetry 478 μm right, 465 μm left) and elevation of the posterior float (54 μm right, 63 μm left), consistent with at least subclinical keratoconus ( Figure 1A).Repeat corneal tomography was performed again at age 12 and did not show any significant changes in either eye ( Figure 1B); slitlamp examination and visual acuity were not performed.The child was not seen again until age 15 at which time the visual acuity was noted to be: right 6/5 unaided, left 6/15 (+1.00 −3.00 × 135 = 6/7.5). Corneal tomography showed signs of progressive keratoconus in the left eye with increased steepening,