Hello Shaik !!

Candidates with vision disability of less than 40% are allowed to study MBBS through NEET under PH category.  40% or above , the candidates are not eligible.

The guidelines say that , low vision refers to a condition in which an person has any of the following conditions -

1)Visual acuity not exceeding 6/18 or 20/60 and less than 6/60 or 20/200 (Snellen) in the better eye with correcting lens; or

2) Limitation of the field of vision subtending an angle of more than 20 degrees upto 40 degree.

All the best.

Hope this helps.