The Oxford modular cataract image analysis system.
A modular system of acquisition and analysis of Scheimpflug, retro-illumination and fluorescence images of the in vivo human crystalline lens is described. Image analysis is directed towards the following goals: Scheimpflug slit-images are analysed for: (1) The optical density of nuclear cataract present; (2) The dimensions of the lens and the lenticular zones; (3) The curvatures of the lens and lenticular zones. Retro-illumination images are analysed for: (1) The percentage area which is occupied by cataract; (2) A combined measure (weighted integral) describing both the amount of cataract present and its optical density. Lenticular auto-fluorescence images are analysed for the mean density (fluorescence) of the lens as a whole. A pilot study of the repeatability of the methods is presented.
Sparrow
J M
JM
Clinical Cataract Research Unit, Nuffield Laboratory of Ophthalmology, University of Oxford, England.
Brown
N A
NA
Shun-Shin
G A
GA
Bron
A J
AJ
D002386:Cataract / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D007908:Lens, Crystalline / Q000473:pathology*; D008838:Microcomputers