<prompt> The thickness of the cornea is best detected by-KeratometryPachymetryPlacido discTonometry  <response>: Ans. b PachymetryRef: A.K. Khurana 6th ed. 195-96, Khurana 4th ed.89 Corneal thickness is measured by the method known as pachymetry. Normal corneal thickness is around 0.52 mm - 0.7 mm 500 - 700 pm.Also Know PLACIDO DISC- for corneal surface Keratometry- Corneal curvature Tonometry- for IOP 