visual acuity

例句：

1. 1.She needs to improve her visual acuity to see better.
   她需要提高她的视力清晰度以便看得更清楚。
2. 2.The doctor recommended that she wear glasses to improve her visual acuity.
   医生建议她戴眼镜以改善她的视力清晰度。
3. 3.The patient's visual acuity was tested before and after the surgery.
   患者手术前后的视力进行了测试。