Answer:
no it doesn't.
Explanation:
It just wouldn't make sense for it to effect the health of the entire nation unless it is Gentilic.
You haven’t provided any statements regarding collection practices.. So how am I able to actually answer this question? I am not.
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
The great saphenous vein (or GSV).