<prompt> Corneal curvature measured by -KeratometryPachymetryGonioscopyPerimetry  <response>: Ans. is a i.e., Keratometry o The Keratometry or ophthalmometry is an objective method of estimating the corneal astigmatism by measuring the curvature of central cornea.o Gonioscopy - Biomicroscopic examination of the angle of anterior chamber,o Perimetry - Procedure of estimating the extent of visual fields.o Tonography - Non - invasive technique for determining the facility of aqeous outflow C - value. 