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Comparison of spectral‐domain cirrus optical coherence tomography (OCT) and time‐domain Stratus OCT for the evaluation of macular and peripapillar retinal nerve fiber layer thickness in patients with diabetes type 2
Author(s) -
GIL ARRIBAS L,
GARCIA MARTIN E,
IDOIPE M,
FUERTES I,
PINILLA I
Publication year - 2009
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2009.440.x
Subject(s) - cirrus , optical coherence tomography , ophthalmology , nerve fiber layer , medicine , diabetic retinopathy , retinal , diabetes mellitus , optometry , physics , meteorology , endocrinology
Purpose To compare Cirrus Fourier‐domain OCT with Stratus Time‐domain OCT for measuring the peripapillar retinal nerve fiber layer (RNFL) and macular thickness in patients with diabetes mellitus type 2 without diabetic retinopathy. Methods Prospective study of 49 patients with diabetes type 2. Only one eye by each patient was randomly included in the study. All of them were underwent three optic disc cube 200x200 scans and three macular 512x128 volume cube scans with the Cirrus HD‐OCT system (Carl Zeiss Meditec, Inc.) and with the Stratus system. The average of all the scans was calculated. The RNFL thickness average, the RNFL thickness at each quadrant, and each 12 clock‐hours position were evaluated comparing the two devices. The macular values of the nine areas corresponding to ETDRS protocol were compared between both systems. Results 21 men (42.9%) and 28 women (57.1%) were included in the study. Mean age was 60 (42‐72 years). The average of the macular thickness using Cirrus HD‐OCT was approximately 66.37 µm higher the average measured with Stratus (263.52 µm vs 197.15 µm; p=0.001). We did not find statistically significant differences between Cirrus and Stratus in RNFL average thickness measurements. Statistically differences were only found in one clock‐hour position. Conclusion Macular measurements using Cirrus OCT are higher than those measured with Stratus OCT in patients with diabetes mellitus type 2. It doesn’t exist a clear difference in RNFL measurements between two devices. Our results are consistent with other previous studies obtained in healthy subjects in similar conditions.