Application of digital image analysis in cataract retroillumination photography

The Stuttgart digital image analysis system for Scheimpflug photography can be applied without additional extension for pattern recording and densitometric measurements in retroillumination photographic techniques. A preliminary investigation with serial photographs in human cataract showed a large variation in the measured results. Standardisation of photographs taken by the retroillumination technique is not yet possible. For this reason, application of the retroillumination technique is not suitable at this time for clinical longitudinal studies.