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Repeatability of Foveal Sensitivity Measured Using Adaptive Optics Microperimetry
Nivedhitha Govindasamy1, William S Tuten2, David H Brainard3
1Bioengineering Graduate Group, University of Pennsylvania, Philadelphia, PA, USA.
Translational Vision Science & Technology
|August 5, 2026
Summary
Adaptive optics microperimetry provides repeatable foveal sensitivity measurements within and across sessions. This finding supports its use in future longitudinal studies tracking disease progression.
Area of Science:
- Ophthalmology
- Vision Science
- Biomedical Engineering
Background:
- Accurate measurement of retinal sensitivity is crucial for monitoring visual function.
- Adaptive optics (AO) technology offers high-resolution imaging of the retina.
- Assessing the repeatability of AO microperimetry is essential for its clinical application.
Purpose of the Study:
- To evaluate the within-session and between-session repeatability of foveal sensitivity measurements.
- To determine the reliability of adaptive optics microperimetry for quantitative visual field testing.
Main Methods:
- Five normal-sighted participants underwent AO microperimetry at the preferred retinal locus.
- Two psychophysical paradigms (QUEST and MOCS) were used with two stimulus sizes (1.05 and 30.4 arcmin²).
- Measurements were repeated across two sessions separated by approximately two months.
Main Results:
- No significant differences in sensitivity were found between the QUEST and MOCS paradigms.
- Sensitivity measurements demonstrated high repeatability within each session.
- Foveal sensitivity measurements showed no significant differences between the two sessions, indicating good between-session repeatability.
Conclusions:
- Adaptive optics microperimetry provides reliable and repeatable foveal sensitivity measurements.
- The technique is suitable for longitudinal studies assessing changes in visual sensitivity.
- These findings support the use of AO microperimetry in clinical trials and disease monitoring.
