His studies involved using a special software that converts text to voice on the computer.
The 18-year-old knew exactly what he was doing. He is among the three toppers of Delhi Public School, RK Puram, one of the most competitive schools in the city, in the CBSE Class 12 exams.
He bulked up with 94 percent, and scored just 39 marks less than the all-India topper, M Gayatri.
Relatives say Tapas, who was born visually impaired, wants to be a lawyer.
"His daily routine was almost the same as of any normal teenager," said his elder brother, Nakul.
Except most teens wish they had his sort of marks as the rush for college admissions looms.