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Ichiro Maruko, Yukinori Sugano, Hiroshi Oyamada, Tetsuju Sekiryu, Masahiro Akiba, Tomohiro Iida; Morphologic Analysis In Pathologic Myopia Using High Penetration Optical Coherence Tomography. Invest. Ophthalmol. Vis. Sci. 2012;53(14):2668.
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© ARVO (1962-2015); The Authors (2016-present)
Although pathologic myopia is thought to induce the ocular global stretching at the posterior pole, these morphologic changes are not fully understood in vivo. We retrospectively evaluate the morphologic characteristics of choroid and sclera in pathologic myopia using high penetration optical coherence tomography (OCT).
Subfoveal choroidal and scleral thicknesses were measured using the prototype high penetration OCT (TOPCON) with 1060nm light source. We also measured the scleral thickness at 3mm superior, inferior, nasal, and temporal to the fovea on the horizontal and vertical section of OCT. Axial length was measured by optical biometer (IOL Master, Carl Zeiss) in all eyes.
Fifty-eight eyes of 35 patients (7 men and 28 women, mean age 66-year-old) with beyond 26.5mm axial length were examined. Mean axial length was 29.0±1.4mm. Full thickness choroid and sclera were observed in all cases. Mean subfoveal choroidal and scleral thicknesses were 52±38μm and 335±130μm. Mean scleral thickness at 3mm superior, inferior, nasal, and temporal to the fovea was 266±78μm, 259±72μm, 324±109μm (n=39), and 253±79μm, respectively. Subfoveal scleral thickness was thicker than that at 3mm outside of the fovea (p<0.05, respectively).
Full thickness sclera in all cases of pathologic myopia could be observed using prototype high penetration OCT. Subfoveal sclera was thicker than 3mm outside of the fovea. High penetration OCT was useful tool for the morphologic analysis in pathologic myopia.
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