psycho gundam
The Nightmare of Solomon
^ that scan is misleading since the heat is not focused/intense.
the hottest temperature caused by solar exposure are around 40+ celsius, so in terms of damage that wide heat vision feat isn't a threat as superman was attempting to restore normal sunlight.
if anyone knows the sun's output which strikes the earth, this may show the heat generated by his heat vision if math is applied to the distance he had to go to to cover the whole face of the earth + the heat necessary to equal the sun's output (on the earth), then by reducing the angle you can get the factor (or geometric factor) his his HV focuses the solar rays.
🤓