We report a pioneer clinical study using triple-input polarization-sensitive optical coherence tomography (TRIPS-OCT) to assess sub-macular scleral birefringence in 60 children with myopia. Results showed a significant difference in scleral birefringence between high and low myopia groups. In addition, we observed a correlation between axial length and birefringence in the low myopia group. This suggests the potential of using sub-macular scleral birefringence as a biomarker for myopia progression. Despite a high exclusion ratio due to inadequate scleral visibility and other limitations, these findings warrant further large-scale studies.
Polarization-sensitive OCT (PS-OCT) derives image contrast from tissue birefringence. Here, we introduced triple-input polarization sensitive optical coherence tomography (TRIPS-OCT), a new polarimetric modulation and reconstruction strategy for depth-resolved tomographic birefringence imaging in-vivo. We modulated the polarization states between three repeated frames and enabled the reconstruction of the Mueller matrix at each location within the triple-measured frames. We demonstrated a 2-fold reduction of the birefringence noise floor compared to the conventional dual-input reconstruction method, and a 3-fold reduction of the measurement error of optic axis orientation in retinal imaging with the compensation of corneal retardance and diattenuation.
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