Trait: No Eyes
This character has no eyes. They may have lost them, or their species may naturally have no eyes.
If a character is simply blind, use the Blindness trait instead. Note that having no eyes does not imply blindness (and vice versa). For example, the character can be an alien who sees through psychic methods.
If a character's eyes are just not drawn (possibly due to being covered by bangs or as part of the art style (common for protagonists)), and it's never stated or implied that the character has no eyes, use Hidden instead.