Term referring to subtle irregular astigmatism or moderate to high regular astigmatism usually measured by automated corneal topography and simulating keratoconus. However, the condition is usually stationary, corneal thickness is normal and there are none of the biomicroscopic signs of keratoconus (e.g. Vogt's striae, Fleischer's ring).
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann