<prompt> Keratometry is useful in measuringCorneal curvatureCorneal thicknessConical diameterDepth of anterior chamber  <response>: KeratometryA keratometer, also known as an ophthalmometer, is a diagnostic instrument for measuring the curvature of the anterior surface of cornea. Keratometer reading provide the following information to assist in the overall assessment of the cornea:-Radii of curvature of the corneaThe degree of corneal astigmatismThe direction of the principal meridians of the eye, determining whether the astigmatism is with the rule or against the rule:- a key factor in contact lens fitting.The presence of any corneal distortion. 