研究目的
To image and analyze anatomical differences at the temporal raphe between normal and glaucomatous eyes using adaptive optics scanning laser ophthalmoscopy (AOSLO) and optical coherence tomography (OCT), and to relate these differences to visual ?eld measurements.
研究成果
Structural changes occur to the temporal raphe even when local functional loss is mild. These changes can be visualized and measured using high-resolution imaging techniques and proper metrics. The study opens the possibility of using the temporal raphe as a site for glaucoma research and clinical assessment.
研究不足
The study was restricted to a small portion of the raphe due to the small imaging fields of the current AOSLO. The RNFL thickness measurements exhibited a limited dynamic range due to the low contrast of the RNFL layer relative to ganglion cell layer in OCT images.
1:Experimental Design and Method Selection:
The study used AOSLO and OCT to image the temporal raphe in both glaucomatous and normal eyes. The raphe gap, bundle index, GCC thickness, and RNFL thickness were measured and compared between the two groups.
2:Sample Selection and Data Sources:
Nine glaucomatous eyes of 9 patients and 10 normal eyes of 10 controls were enrolled. All participants were imaged in a region centered approximately 98 temporal to the fovea.
3:List of Experimental Equipment and Materials:
AOSLO equipped with a clinical planning module, Heidelberg Spectralis SLO/OCT system, IOLMaster for axial length measurement.
4:Experimental Procedures and Operational Workflow:
Participants underwent axial length measurement, SLO/OCT imaging, and AOSLO imaging. The raphe gap, bundle index, GCC thickness, and RNFL thickness were measured from the images.
5:Data Analysis Methods:
Unpaired t-tests and Mann-Whitney U tests were used to compare measurements between the two groups. Two-way random intraclass correlation coefficient (ICC) was used to assess the reliability of measurements.
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