I have 30 percent low vision can i qualify neet or as a ph person

PwD reservation is given to a candidate if his/her visual impairment is equal to or less than 40%. But if your visual impairment is more than this benchmark i.e. 40%, then you are not eligible for the PWD reservation but if you have any other reservation like OBC/SC/ST etc. you'll eligible for that. Now as you told you have 30% low vision, therefore you're eligible for PwD Reservation in Neet.