Beginner's guide to orthokeratology.

The article offers information related to orthokeratology. Orthokeratology refers to the reduction, modification or elimination of refractive error by the programmed application of contact lenses. The advent of computer numerical controlled (CNC) high precision lathes, reverse geometry contact lens designs, corneal topographers and super high Dk rigid gas-permeable lenses has totally revolutionised this field.