What exam measures the curvature of the cornea?

Q: What exam measures the curvature of the cornea?

 

A: Corneal topography is a technique that is used to detect early forms of corneal ectasia, most notably keratoconus suspects. The technique also allows accurate evaluation of the curvature of the rear face of the cornea, which is essential for the correction of astigmatism (toric contact lenses). The comparisons of data collected from successive tests allow doctors to study the evolution of the disease.