L S Lim1, G Cheung2, S Y Lee3. 1. 1] Singapore Eye Research Institute, Singapore National Eye Centre, Singapore [2] Department of Ophthalmology, National University of Singapore, Singapore. 2. Singapore Eye Research Institute, Singapore National Eye Centre, Singapore. 3. 1] Singapore Eye Research Institute, Singapore National Eye Centre, Singapore [2] Duke-NUS Graduate Medical School, Singapore.
Abstract
PURPOSE: To compare optical coherence tomography (OCT) images obtained with swept-source OCT (SS-OCT) and spectral domain OCT (SD-OCT) in pathological myopia. METHODS: This is a comparative observational cases series. Five patients with pathological myopia underwent SD-OCT and SS-OCT imaging. SS-OCT was performed using a prototype system (Topcon Medical Systems). SD-OCT was performed using enhanced depth imaging on the Heidelberg Spectralis OCT. The closest corresponding scans from the central subfield were compared. RESULTS: Eight eyes of five patients with pathological myopia were included (mean spherical equivalent: -16.00 ± 4.70 D). Overall, SS-OCT better visualized retino-choroidal structures. The choroid, inner segment (IS)/outer segment (OS) line, and external limiting membrane (ELM) were clearly seen in a higher proportion of SS-OCT than SD-OCT scans, (P<0.01 for all) whereas visualization of the sclera and retinal pigment epithelium (RPE) were similar. SS-OCT demonstrated foveoschisis in four eyes, with one of these not visible on SD-OCT. The wider SS-OCT scan revealed additional pathology not visible using SD-OCT along the staphyloma walls in 4/8 images. These included incomplete posterior vitreous detachment in one eye and peripheral retinoschisis in 3/8 eyes. Vitreoschisis was visible in 3/8 SS-OCT images but not in the SD-OCT images. CONCLUSION: SS-OCT is useful for imaging the posterior staphyloma of pathological myopia, providing greater detail than SD-OCT.
PURPOSE: To compare optical coherence tomography (OCT) images obtained with swept-source OCT (SS-OCT) and spectral domain OCT (SD-OCT) in pathological myopia. METHODS: This is a comparative observational cases series. Five patients with pathological myopia underwent SD-OCT and SS-OCT imaging. SS-OCT was performed using a prototype system (Topcon Medical Systems). SD-OCT was performed using enhanced depth imaging on the Heidelberg Spectralis OCT. The closest corresponding scans from the central subfield were compared. RESULTS: Eight eyes of five patients with pathological myopia were included (mean spherical equivalent: -16.00 ± 4.70 D). Overall, SS-OCT better visualized retino-choroidal structures. The choroid, inner segment (IS)/outer segment (OS) line, and external limiting membrane (ELM) were clearly seen in a higher proportion of SS-OCT than SD-OCT scans, (P<0.01 for all) whereas visualization of the sclera and retinal pigment epithelium (RPE) were similar. SS-OCT demonstrated foveoschisis in four eyes, with one of these not visible on SD-OCT. The wider SS-OCT scan revealed additional pathology not visible using SD-OCT along the staphyloma walls in 4/8 images. These included incomplete posterior vitreous detachment in one eye and peripheral retinoschisis in 3/8 eyes. Vitreoschisis was visible in 3/8 SS-OCT images but not in the SD-OCT images. CONCLUSION:SS-OCT is useful for imaging the posterior staphyloma of pathological myopia, providing greater detail than SD-OCT.
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