他们要读出镜框内的视力表。

But they have to read the panel in a mirror.

验光师指着视力表问他：“你能认出来吗？”

The optician asked him to point to a test card.

作为检测的一部分，远视力检测是通过识别视力表上的字母来完成的。

As part of the testing, letters on a distance chart are identified.