Savant syndrome (pronounced /səˈvɑːnt/[1]), sometimes referred to as savantism, is a rare condition in which people with developmental disorders have one or more areas of expertise, ability, or brilliance that are in contrast with the individual's overall limitations. Although not a recognized medical diagnosis, researcher Darold Treffert says the condition may be either genetic or acquired.[2]
Savantism on Wiki
Leslie Lemke:
An amazing story about Leslie Lemke. He had his eyes removed as a child and suffers from a very difficult autism.
Leslie Lemke on Wikipedia
Alonzo Clemons:
Alonzo is an amazing animal sculptor, who molds creatures out of clay so easily. Atleast it is easy for him!

Alonzo's sculptings
Alonzo on Wikipedia