noun
eye chart; eyesight test chart
A chart used to measure visual acuity, typically with letters or symbols of decreasing size.
学校の健康診断で視力検査表を使った。
We used an eye chart during the school health checkup.
Compound of 視力 (shiryoku, 'eyesight') + 検査 (kensa, 'test') + 表 (hyō, 'chart').