網膜静脈分枝閉塞症の網膜厚と網膜感度の相関

Correlation between retinal thickness and retinal sensitivity in branch retinal vein occlusion

目的：黄斑浮腫がある網膜静脈分枝閉塞症での網膜厚と網膜感度の関係の検索。対象と方法：網膜静脈分枝閉塞症7例7眼を対象とし，光干渉断層計で網膜厚を，マイクロペリメータで微小網膜感度を測定した。光干渉断層計によるretinal map上下の4領域の内側と外側領域で，網膜厚と網膜感度について，病変部と健常部の差を健常部の値で徐し，その百分率を変化率とした。結果：内側領域（r＝－0.92，p＝0.004），外側領域（r＝－0.83，p＝0.02）ともに有意な負の相関があった。結論：網膜静脈分枝閉塞症病変部での網膜厚の増大は，網膜感度の低下の一因である可能性がある。

Purpose：To evaluate the correlation between retinal thickness and sensitivity in eyes with macular edema secondary to branch retinal vein occlusion. Cases and Methods：Retinal thickness was measured by an optical coherence tomography and retinal sensitivity was measured by a microperimeter in 7 affected eyes. Retinal thickness and sensitivity were evaluated as the difference between affected and healthy retinal area divided by that of healthy area. Results：Retinal thickness and sensitivity were negatively correlated in retinal areas inner（r＝－0.92,p＝0.004）and outer（r＝－0.83,p＝0.02）to the lesion. Conclusion：Increased retinal thickness may be one of the reasons for decreased retinal sensitivity in branch retinal vein occlusion.