%0 Journal Article
%A Tavares, I. M.
%A Ribeiro, P. S.
%A Pereira, L. M. G.
%A Mello, P. A.
%T  Agreement Between Two Different Technologies for Retinal Nerve Fiber Layer Thickness Evaluation
%B Investigative Ophthalmology & Visual Science
%D 2008
%J Investigative Ophthalmology & Visual Science
%V 49
%N 13
%P 1854-1854
%@ 1552-5783
%X    Purpose:  To compare and correlate retinal nerve fiber layer (RNFL) thickness assessed by two different technologies, the optical coherence tomography (Stratus OCT) and the laser scanning polarimetry with variable corneal compensator (GDx VCC).     Methods:  Thirty-seven eyes of 37 normal individuals were scanned with Stratus OCT and GDx VCC to assess the RNFL thickness. The mean (± SD) age was 22.70 (± 3.46) years. The Fast RNFL Thickness 3.4 protocol and GDx VCC 2.8 mm standard scan circle were used for obtaining images in all subjects. Pupils were dilated for OCT images only. GDx VCC TSNIT Average, Superior Average and Inferior Average, as well as Stratus OCT Average Thickness, Superior Average and Inferior Average parameters were assessed and compared.     Results:  GDx VCC mean (± SD) TSNIT Average, Superior Average and Inferior Average were 57.73 (± 8.92), 70.84 (±6.82) and 68.13 (±8.92), respectively. Stratus OCT mean (± SD) Average Thickness, Superior Average and Inferior Average were 107.75 (± 9.45), 131.92 (± 15.37) and 137.49 (± 15.02), respectively. Pearson correlation coefficients for these parameters were 0.62 (P<0.001), 0.43 (P<0.01) and 0.71 (P<0.001), respectively.     Conclusions:  RNFL thickness obtained by GDx and OCT presented moderate to strong correlation, but OCT measurements were about two-fold thicker. Therefore, RNFL thickness data obtained by GDx VCC and Stratus OCT are not interchangeable.    
%[ 9/20/2021