Keratoconus detection using corneal topography.

UNLABELLED

PURPOSETo review the topographic patterns associated with keratoconus suspects and provide criteria for keratoconus screening.

METHODS

Case study using maps from the NIDEK OPD-Scan II and OPD Station to highlight patterns seen in keratoconic corneas.

RESULTS

Five criteria are listed for the detection of keratoconus: 1) apex of the cone is not centered at the 6-o'clock semi-meridian, 2) cone should appear round on the tangential map, 3) keratometry >45.00 diopters, 4) corneal thickness at the apex of the cone is approximately 30 microm thinner than the corresponding distance above the pupil center, and 5) topographic patterns are not symmetric.

CONCLUSIONS

Standard corneal topography maps and simple clinical evaluation criteria are fundamental to detect keratoconus suspects and keratoconus.