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要約 目的:黄斑部の網膜神経節細胞層複合体厚(GCC)の光干渉断層計(OCT)による測定値の,水晶体の有無による違いの報告。対象と方法:スペクトラルドメインOCTで,白内障手術前後でのシグナル強度(SSI)とGCC厚を22眼で測定した。平均年齢は75.2歳,術前の平均視力は0.5±0.2であった。結果:GCCの平均厚は術前82.1μm,術後98.0μmで,有意差があった(p<0.0001)。術前後のSSIの差と水晶体混濁指数との間には有意差があった(r=0.47,p<0.02)。SSIとGCCそれぞれの術前後の差には有意な相関があった(r=0.70,p<0.0001)。結論:スペクトラルドメインOCTで測定したGCC厚とSSIは,白内障眼では小さい値が得られる。
Abstract. Purpose:To report the effect of cataract on thickness of ganglion cell complex(GCC)and signal strength index(SSI)measured by spectral domain optical coherence tomography(OCT). Cases and Method:Thickness of GCC was measured in 22 eyes before and cataract surgery. The age averaged 75.2±5.9 years. Results:Thickness of GCC averaged 82.1μm before and 98.0μm after surgery. The difference was significant(p<0.0001). There was a significant correlation between lens opacity score and difference in SSI(r=0.47,p<0.02). There was a significant correlation between differences in SSI and thickness of GCC(r=0.70,p<0.0001). Conclusion:Measured values of GCC and SSI by OCT tend to be smaller in eyes with cataract.
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