> You can't have a pair of glasses that is simultaneously opaque enough to give you the illusion you are in another place AND breezy enough so that your eyes wo

> You can't have a pair of glasses that is simultaneously opaque enough to give you the illusion you are in another place AND breezy enough so that your eyes won't sweat. Air is just much bigger than light, so you can't block light but allow air to pass through. So a VR headset will always be sweaty on the face. AR will never be able to create realistic opaque backgrounds. You can have a fan that pull the air in or out of the inside of the glasses without any light ever coming in.