Recently we have installed a topographer at McDonald Adams. This instrument maps the outer surface of the eye - the cornea. The cornea is responsible for most (70%) of the eye's focussing power. Creating a topographical map of the curvature of the eye is helpful to check the quality of vision and corneal health.
A colourful three-dimensional map is created by a measuring a grid of thousands of points across the cornea. Mapping only takes a few seconds.