What does standard III vision means in tnpsc?

What does standard III vision means in tnpsc?

The Physical fitness form is required by the candidates at the time of certificate verification of whenever asked to produce. In this Physical fitness the standard of vision is a must required fitness for any post.

In that case, this std III vision requirement applies to most of the recruitments of TNPSC. This is given in detail below:-

Standard III vision requirements :

 1) 6/9 in both the eyes.

2) Distant Vision should be 6/9 without glasses.

3) Distant Vision with glasses should be 6/12.