( EYE-SHADE / EYEGLASS / EYE PICE / EYE CHART ) _________ IS USED T...

1. - 200 CAU TRAC NGHIEM TA 9
200 CAU TRAC NGHIEM TA 9

1. ( Eye-shade / Eyeglass / Eye pice / Eye chart ) _________ is used to check one’s eyesight.