| ประโยคภาษาจีน : 中文句子 | 
|---|
|  tí gāo提高  yí gè一个  jí bié级别  huò zhě或者  shì lì biǎo视力表  jiǎn chá检查  tí gāo提高  wèi为  yǒu xiào有效  shì yě视野  quē sǔn缺损  de的  gǎi shàn改善  yě也  wèi为  yǒu xiào有效 | 
| Improvement of visual acuity of one grade or more or increase of 0.1 by acuity chart, and improvement of visual field were defined as effective. |