Moorfields reference plane provides better HRT image change discrimination

This analysis of a longitudinal Heidelberg Retina Tomograph (HRT; Heidelberg Engineering, Inc.) series concluded that the Moorfields reference plane may be more suitable than the standard reference plane for detecting optic nerve head (ONH) changes associated with glaucoma development and progression.

The study's authors retrospectively reviewed images taken over a seven-year period of 31 ocular hypertensive subjects who developed visual field defects during the study period and 19 subjects without risk factors for glaucoma. The HRT images were analyzed with five different reference planes.

The Moorfields reference plane was found to provide better reproducibility of HRT stereometric parameters compared with the standard reference plane and was thought to have a greater ability to discriminate rim area changes from measurement variability.