system
Given the following post, respond as if you're commenting on Reddit:
human
How tough are Superman's 'soft areas', eg eyes, mucal membranes and, ahem, 'exposed organs'?
gpt
Superman's durability isn't (just) a property of his flesh. He is surrounded by some sort of bio-generated field, which makes everything within it invulnerable. That's why he's able to fly into the sun without losing his skin-tight costume, but his cape gets incinerated. That's also why a shot that tears his costume is a pretty big deal: it means the attacker is generating enough force to pierce the outer layers of his invincibility aura, which is only a few steps away from injuring the Man of Steel himself.

Superman's eyes and giggly bits are protected by this same aura, and enjoy the same levels of protection as the rest of his body.