PURPOSE: 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 field measurements. METHODS: Nine glaucomatous eyes of 9 patients (age 54-78 years, mean deviation of visual field [MD] -5.03 to -0.20 dB) and 10 normal eyes of 10 controls (age 54-81, MD -1.13 to +1.39 dB) were enrolled. All the participants were imaged in a region that was centered approximately 9° temporal to the fovea. The size of imaging region was at least 10° vertically by 4° horizontally. The raphe gap, defined as the distance between the superior and inferior retinal nerve fiber layer (RNFL) bundles, was measured. A bundle index was computed to quantify the relative reflectivity and density of the nerve fiber bundles. We also measured thickness of the ganglion cell complex (GCC) and RNFL. RESULTS: The raphe gap was larger in glaucomatous eyes than control eyes. Specifically, eight glaucomatous eyes with local averaged field loss no worse than -3.5 dB had larger raphe gaps than all control eyes. The bundle index, GCC thickness, and RNFL thickness were on average reduced in glaucomatous eyes, with the first two showing statistically significant differences between the two groups. CONCLUSIONS: Structural changes in the temporal raphe were observed and quantified even when local functional loss was mild. These techniques open the possibility of using the raphe as a site for glaucoma research and clinical assessment.
PURPOSE: 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 field measurements. METHODS: Nine glaucomatous eyes of 9 patients (age 54-78 years, mean deviation of visual field [MD] -5.03 to -0.20 dB) and 10 normal eyes of 10 controls (age 54-81, MD -1.13 to +1.39 dB) were enrolled. All the participants were imaged in a region that was centered approximately 9° temporal to the fovea. The size of imaging region was at least 10° vertically by 4° horizontally. The raphe gap, defined as the distance between the superior and inferior retinal nerve fiber layer (RNFL) bundles, was measured. A bundle index was computed to quantify the relative reflectivity and density of the nerve fiber bundles. We also measured thickness of the ganglion cell complex (GCC) and RNFL. RESULTS: The raphe gap was larger in glaucomatous eyes than control eyes. Specifically, eight glaucomatous eyes with local averaged field loss no worse than -3.5 dB had larger raphe gaps than all control eyes. The bundle index, GCC thickness, and RNFL thickness were on average reduced in glaucomatous eyes, with the first two showing statistically significant differences between the two groups. CONCLUSIONS: Structural changes in the temporal raphe were observed and quantified even when local functional loss was mild. These techniques open the possibility of using the raphe as a site for glaucoma research and clinical assessment.
Authors: Justin V Migacz; Oscar Otero-Marquez; Rebecca Zhou; Kara Rickford; Brian Murillo; Davis B Zhou; Maria V Castanos; Nripun Sredar; Alfredo Dubra; Richard B Rosen; Toco Y P Chui Journal: Biomed Opt Express Date: 2022-03-01 Impact factor: 3.732
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Authors: Luca Scuderi; Irene Gattazzo; Alessandro de Paula; Clemente Maria Iodice; Federico Di Tizio; Andrea Perdicchi Journal: Int Ophthalmol Date: 2022-01-30 Impact factor: 2.029
Authors: Stephen A Burns; Ann E Elsner; Kaitlyn A Sapoznik; Raymond L Warner; Thomas J Gast Journal: Prog Retin Eye Res Date: 2018-08-27 Impact factor: 21.198
Authors: Susana Marcos; John S Werner; Stephen A Burns; William H Merigan; Pablo Artal; David A Atchison; Karen M Hampson; Richard Legras; Linda Lundstrom; Geungyoung Yoon; Joseph Carroll; Stacey S Choi; Nathan Doble; Adam M Dubis; Alfredo Dubra; Ann Elsner; Ravi Jonnal; Donald T Miller; Michel Paques; Hannah E Smithson; Laura K Young; Yuhua Zhang; Melanie Campbell; Jennifer Hunter; Andrew Metha; Grazyna Palczewska; Jesse Schallek; Lawrence C Sincich Journal: Vision Res Date: 2017-02-27 Impact factor: 1.886