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Abstract #10484 Published in IGR 6-1
Correlations between retinal thickness analyzer (RTA) and confocal scanning laser tomography (HRT) in optic disc analysis
Martinez De La Casa JM; Garcia Feijoo J; Castillo Gomez A; Garcia Sanchez JArchivos de la Sociedad Española de Oftalmologia 2004; 79: 21-25
OBJECTIVES: To determine whether the measures obtained in an optic disc study using the retinal thickness analyzer (RTA) can be adequately correlated with values provided by the confocal scanning laser Heidelberg Retina Tomograph (HRT). METHODS: The authors analyzed 20 eyes of 20 normal subjects. The contours of the optic disc were drawn by a single operator using both instruments. The data compared were the values of ten variables denoted in the same way by each instrument, and these provided information on disc and cup morphology. RESULTS: Of the ten variables, only the following three showed clear correlation between the two instruments: maximum cup depth (r = 0.926, p = 0.001), mean cup depth (r = 0.857, p = 0.001) and cup shape measure (CSM, r = 0.672, p = 0.002). The correlation shown by the remaining variables ranged from 0.001 (cup area) and 0.488 (cup volume). CONCLUSIONS: The variables showing best correlation between instruments were those providing information on cup morphology. Operator subjectivity when drawing the disc contour using each device could account for the lower incidence of correlation of the other variables examined. LA: Spanish
Dr. J.M. Martinez de la Casa, Hospital Clinico San Carlos, Instituto de Investigaciones Oftalmologicas Ramon Castroviejo, Madrid, Spain. martinezcasa@jazzfree.com
Classification:
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)
6.9.1 Laser scanning (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis)