Evaluation of the anterior chamber angle in keratoconus and normal subjects.

Purpose To evaluate the anterior chamber angle in keratoconus eyes by use of the Visante™ OCT and Orbscan™ II. Methods Anterior chamber angle was measured with the Visante™ OCT and Orbscan™ II in 52 subjects, 26 KC subjects and 26 age and control subjects. Results When comparing the nasal and temporal angles obtained with the two techniques no correlation was found ( R 2 always below 0.01) in either the control subjects or in the KC subjects. Despite this, there was an overall statistically significant difference in mean anterior chamber angles ( p < 0.001) between Visante™ OCT and Orbscan™ II. There was no statistical difference ( p > 0.05) between nasal and temporal anterior chamber angles when comparing controls and KC subjects with either of the two instruments. In general, the Visante™ OCT gave a smaller estimate of the anterior chamber angle. Conclusion The values from the Visante™ OCT and Orbscan™ II cannot be interchanged since the difference in measurement of the anterior chamber angle was significantly different between the two instruments. [ABSTRACT FROM AUTHOR]