过去20年的数据显示，许多国家在预防和治疗视力损害方面取得了重大进展。
Data over the last 20 years shows that there has been significant progress in preventing and curing visual impairment in many countries.
报道162例屈光参差患儿在视力、眼位、立体视功能、屈光参差演变四方面的临床观察结果及治疗情况。
The clinical observation results and treatment of 162 cases are reported in four aspects: children's vision, eye position, stereopsis and the evolution of anisometropia.
以上是一幅海洋画，作这幅画的目的是为了要让观众的视力在重要的透视法与缩短法方面受到训练。
The above is a marine picture, and is intended to educate the eye in important matters of perspective and foreshortening.
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