What does a keratometer reading exceeding 0.50D indicate?

A keratometer reading exceeding 0.50 diopters (D) indicates an irregularity in the cornea's curvature, which suggests that there may be underlying pathology or poorly fitting contact lenses. Normally, a keratometric reading within this range would reflect a more standard, healthy corneal shape. When the reading exceeds 0.50D, it can point towards various conditions such as astigmatism, corneal ectasia, or other corneal irregularities that might need further investigation.

Additionally, poorly fitting lenses can lead to distorted keratometric readings. If contact lenses do not align properly with the eye's natural curvature, this can also cause changes in the keratometer's measurements. A careful assessment of the keratometer readings can therefore help determine the necessity for a comprehensive eye examination or a reevaluation of the lens fit, making this specific reading significant for determining the health of the cornea and the suitability of current visual aids.