"potter! i heard you got a secret admirer!" the voice laughs. ALSO ON AO3 WITH CORRECT GRAMMAR AND MISTAKES: "Secret Admirer" by "blissfcll"

Following an accident in his seventh year, Draco loses his eyesight. After Harry elbows his way into Draco's dark world, both boys find themselves in a strange new friendship, and they each learn new ways to see each other ... and themselves.

A Drarry story where Draco has OCD and it actually works to Harry's advantage.