I recently read a short story titled 'Si loin du monde...' by a French sci-fi writer. It makes quite a depressing reading, to be honest, but anyway, the main character of the story is an alien who has been sent to Earth in order to gather information about the environment and the people which could serve as a basis for subsequent infiltration of Earth by the alien race.
What this nameless alien(we only get to know the name of his home planet, Fylchride) describes looks to me like a perfect description of how a mildly autistic person with severe sensory problems feels in the ordinary world.
The alien has been specifically trained to stay calm and logical in every situation and has some superior survival mechanisms, but, as it turns out, it is the sensory overload that is killing him (it, actually - I don't think that the alien has a gender per se). He can't stand the noise, the smells and the colours of the city he lives in; can't understand why Earth people would talk all the time without exchanging information; their pointless inquisitiveness (asking you about your name, when were you born, etc.) and the expectation that, in turn, you would ask them personal questions; the variety of shapes, styles and sizes in which everything comes (as if only one, utilitarian style is not enough); the nature of things that amuse other people; the apparent lack of purpose in their everyday action, etc. He is grossed out at the very idea of being touched and the only Earth thing that seems to appeal to him are cats. He is forced to use earplugs and tinted glasses to alleviate the sensory overstimulation.
The story has no ending but apparently the alien gets depressed, then physically sick and eventually dies. Turns out that he was actually the second agent (002) sent by their race on Earth and a third is due in some time but not before the Agent 002 has the opportunity to warn him not to stay but go back to Fylchride. The very first agent had died the same way, so they don't learn how to counter the ill effects of Earth environment and they don't have the chance to tell each other that Earth is no place for them.
Why, anytime a TV commercial booms in my ears and I feel like dying, I'd better think about poor Agents 001 and 002 and how they died simply because of too much TV.