RT Journal Article
A1 Liu, Hongting
A1 Bittencourt, Millena G.
A1 Sophie, Raafay
A1 Sepah, Yasir J.
A1 Hanout, Mostafa
A1 Rentiya, Zubir
A1 Annam, Rachel
A1 Scholl, Hendrik P. N.
A1 Nguyen, Quan Dong
T1 Fixation Stability Measurement Using Two Types of Microperimetry Devices
JF Translational Vision Science & Technology
JO Trans. Vis. Sci. Tech.
YR 2015
DO 10.1167/tvst.4.2.3
VO 4
IS 2
SP 3
OP 3
SN 2164-2591
AB We compared the fixation stability measurements obtained with two microperimeters, the Micro Perimeter 1 (MP-1) and the Spectral OCT/SLO (OCT/SLO), in subjects with and without maculopathies. A total of 41 eyes with no known ocular diseases and 45 eyes with maculopathies were enrolled in the study. Both eyes of each participant had a 20-second fixation test using the MP-1 and OCT/SLO. The bivariate contour ellipse area (BCEA) was used for fixation stability evaluation. In the normal group, BCEA was 2.93 ± 0.32 log minarc2 on OCT/SLO and 2.89 ± 0.30 log minarc2 on MP-1. In the maculopathy group, BCEA was 3.05 ± 0.41 log minarc2 on OCT/SLO and 3.15 ± 0.46 log minarc2 on MP-1. There was no statistically significant difference between the BCEA measured by OCT/SLO and by MP-1 in both groups. A moderate correlation was found between the two devices (r = 0.45, P < 0.001). The sample size during the fixation test was 535.5 ± 14.6 pairs of coordinates in the normal group and 530.7 ± 14.9 pairs in the maculopathy group with MP-1, while it was 72.3 ± 6.9 and 59.9 ± 10.1, respectively, with OCT/SLO. This was due to different tracking frequencies between the two microperimeters. Fixation stability assessment yields similar results using the OCT/SLO and MP-1. A major difference in sampling rate between the two microperimeters does not significantly affect BCEA measurements. Fixation stability assessments are comparable and interchangeable between the OCT/SLO and the MP-1.
RD 6/6/2020
UL https://doi.org/10.1167/tvst.4.2.3