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목적 : To investigate the repeatability of peripapillary retinal nerve fiber layer (RNFL) thickness measurements obtained using Cirrus high-definition optical coherence tomography (Cirrus HD-OCT) retinal tracking system during eye movement.
방법 : We enrolled 20 healthy eyes of 10 subjects. For each eye, RNFL thickness measurements were performed under 3 conditions: (1) without eye movement, fixated on the device’s internal target, (2) with horizontal eye movement, and (3) with vertical eye movement during scan acquisition. Each session was performed 3 times with and without the use of the Cirrus HD-OCT retinal tracking system. The repeatability of RNFL thickness measurements obtained with and without the retinal tracking system was compared within each session and among the sessions.
결과 : During fixation, there was no difference in RNFL thickness measurement repeatability with and without the use of the retinal tracking system. Without use of the retinal tracking system, conditions with horizontal and vertical eye movements had reduced the measurement repeatability in comparison to conditions without eye movement. However, when retinal tracking system was used, measurement repeatability under conditions with horizontal and vertical eye movements was similar to that achieved without eye movement and higher than that obtained without the use of a retinal tracking system.
결론 : Cirrus HD-OCT retinal tracking system may enhance RNFL thickness measurement repeatability under conditions with eye movement.
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