Measurement of corneal thickness by videopachymetry: preliminary results

Corneal thickness measurements find applications in areas such as diagnosis and management of corneal disorders and corneal surgery. We present a technique for the measurement of corneal thickness using a CCD camera mounted on a slit-lamp biomicroscope and common image processing software. Thickness measurements were performed on three RGP contact lenses of known thickness with an average error of 5 microm, SD of 8 microm. Measurements of a living cornea yielded a thickness of 505 microm and a SD of 8 microm for 10 consecutive measurements; this is an acceptable value.