Dear student, according to the guidelines issued by World Health Organisation, the Supreme Court has specifically made law for the reservation granted to Vision impairment students. You can know the detailed information at the website:

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.sci.gov.in/supremecourt/2018/22116/22116_2018_Order_24-Aug-2018.pdf&ved=2ahUKEwiZ6v_Ok__jAhUPSX0KHXZHDJIQFjAOegQIAhAB&usg=AOvVaw3OxwkixfBU-ArhGRedDCLd&cshid=1565675600262