Here are things that you may need to know:
I first read this in an anthology which was used for a college class ca. 1995.
I remember that the cover was a picture of a starscape; nothing fancy, just a background of black with white stars. And the anthology title, too, was on there, I'm sure.
This anthology also had the story of "In the land of the blind, the one eyed man is king". Aldous Huxley?
The plot goes something like this: A spaceman from Earth (astronaut) experiences a collision and needs to make repairs. But he's by himself (it is a "he"), and he needs to time things. To do this, he starts counting in seconds and then does quick math to determine different timers. Then he needs to keep counting to track numerous things, like objects, processes, and time. He gets to a point where he realizes after a while that he can't stop counting. It's automatic and unending. The story goes on to describe the consequences, good and bad (and terrible) of his ability to do this.
Anybody remember anything like this? Thanks for your time.
Edit 1: The story I read was in English.
Edit 2: I do not know the original publication date. No clue actually, other than before 1995.
Edit 3: I do not recall anything about the author's name or gender. Sorry.
Edit 4: Trying to recall, but I remember that the astronaut returns to Earth and talks with a person from the ground crew involved in the mission; the Director, maybe. And I think it is the same person that talked to the protagonist right after the collision at the beginning of the story.