It is use by Eye Care Professionals To check the eyesight of a person.
If u would have visited a eye care centre u would have noticed a chart like this--
If a person can see all the letters from a distance his eyesight is Perfect.If that person misses a letter or a line from the grid eye treatment or spectacles are given to the person for improving their eyesight
Hope this helps but I think it could be:
Possible answer: Emergency Room visits are preferred when someone's health is in immediate danger and immediate attention is necessary.
Answer: It’s not okay.
Explanation:
Me personally being a girl it’s just not right for anyone to be treated as such.