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
Answer: bones are organs because they protect your organs of the body, and produce red and white blood cells, store minerals, provide structure and support for the body, and enable mobility, so you can be able to,do things.
Explanation:
<span>Friction is the resistance when one surface or object encounters another. </span>
a category of stressorsbest describes a catastrophe.