>>6023705It represents what's in orange here. The upper eyelid fat curls into the socket and stops where the socket connects with the nose bridge creating a change of plane and value. Basically an adaptation manga artists made for line art, it's usually hatched or just represented by those lines. Some artists still butcher that shit though, because they don't know what the fuck it's supposed to represent.
The connection is a lot more seeable in caucasian people with hooded eyes, because asian people barely have a nose bridge to begin with.
