Can Superman cut himself with his heat vision?
Can Superman cut an alternate version of himself (e.g. clone, parallel universe) using his heat vision?
Can Superman cut himself with his heat vision?
Can Superman cut an alternate version of himself (e.g. clone, parallel universe) using his heat vision?
In Justice League (2001), in episode A Better World, an alternate Superman used his heat vision to lobotomise Doomsday, which implies going through the skin and the bones then damaging part of the brain.
Considering the fact Doomsday is a clone with Kryptonian DNA, we can assume that Superman himself could equally be affected similarly by another Kryptonian heat vision.