走査型レーザー検眼鏡を用いた中心窩移動術の回転角度の測定

Measurement of ocular cyclodeviation following macular rotation surgery using a scanning laser ophthalmoscope

　中心窩移動術を行った14眼14症例で網膜回転角度を測定した。測定には走査型レーザー検眼鏡（SLO）のスコトメトリープログラムを使用した。原疾患は，加齢黄斑変性症11眼，近視性新生血管黄斑症3眼であった。術前術後にSLOで撮影した画像をプリントアウトし，乳頭中心部と固視点を結ぶ線から回転角度を算出した。回転角度は15.5度〜44.7度，平均30.4度であった。術後に自覚的複視を強く自覚した9症例での回転角度は平均30.6度，その他の5症例での回転角度は平均29.0度で，回転角度と複視の間には相関はなかった。SLOのスコトメトリープログラムで，自覚的回転角度の測定が可能である。

Purpose:To quantitate the ocular cyclodeviation following macular rotation surgery using a scanning laser ophthalmoscope (SLO).

Cases and Methods:Macular rotation surgery was performed in 14 eyes during a 11-month period. The cases comprised age-related macular degeneration 11 eyes and myopic choroidal neovascularization 3 eyes. The amount of cyclodeviation was measured using the printed fundus images taken by scotometry program of SLO before and after surgery. It was defined as the angle between the horizontal line and the line running through the fovea and the center of the disc.

Results:Postoperative cyclodeviation ranged from 15.5 to 44.7 degrees, average 30.4 degrees. It averaged 30.6 degrees in 9 cases with persistent diplopia, and 29.0 degrees in the other 5 cases. The difference was not significant.

Conclusion: SLO scotometry program was useful in quantitating the angle of cyclodeviation following macular rotation surgery. The amount of cyclodeviation was not related to postoperative diplopia.