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過去のわれわれの研究により裸眼立体視訓練による視力改善効果が示された。その訓練を5週間行った効果を検討した。【方法】対象は栗田式視力回復法講習の成人受講者9名。1週間に一度ずつ5回集まって訓練を行った。「裸眼3D視」(以下、3D訓練)を行い、訓練前後で視力を測定し、5週の平均値をデータとして使用した。【結果】以下平均値で示す。左右裸眼視力は、3D訓練では0.14→0.19で0.04増加(30%増加)。左右矯正視力は、3D訓練では0.79→0.94で0.15増加(19%増加)。5週間の長期効果は以下の通り。両裸眼視力は0.12→0.27と改善(0.14増加)。倍率の平均値は2.2倍。平均値相互の倍率は2.2倍。両矯正視力は0.71→0.94と改善(0.24増加)。倍率の平均値は1.34倍。平均値相互の倍率は1.43倍だった。【考察】3D訓練には即時視力改善効果があることが再確認できた。5週間訓練すると、視力が長期的に改善することが示された。
Our previous study demonstrated immediate changes in eyesight in response to a method of training in free stereo viewing. In the present research we observed the same changes in another group and investigated the effects of the training for five weeks. [Method] The subjects were a group of nine adults attending Kurita's eyesight recovery course employing "training in free stereo viewing" (3D viewing) once a week for five weeks. Eyesight was measured before and after each training session, and the average value of the eyesight measurements for the five weeks was used as data. [Result] The results are shown as average values. The 3D viewing brought about an improvement in the naked-eye eyesight (without glasses) of both eyes from 0.14 to 0.19 (difference of 0.04, increase of 30%), and an improvement in the corrected eyesight (with glasses) of both eyes from 0.79 to 0.94 (difference of 0.15, increase of 19%). After the five-week period of the training, the naked-eye eyesight of both eyes changed from 0.12 to 0.27 (difference of 0.14), for an average increase of 2.2 times (increase of 2.21 between the two average values), and the corrected eyesight of both eyes changed from 0.71 to 0.94 (difference of 0.24), for an average increase of 1.34 times (increase of 1.43 times between the two average values). [Assessment] The 3D training had the immediate effect of eyesight improvement. The results also suggested that when the method is continued for five weeks, the improvement can be expected to increase during the period of training.
