Have you ever noticed how eyes look behind glasses and how the glass catches the light?

I just watched an old film called “flight of the phoenix”. The actor playing an engineer wears glasses, but as it’s a desert location the sun is very bright. Every so often his glasses glint. But you can see it’s a flat surface, no curve on the glass. That means they are not assisting his vision. Also his eyes are a normal size behind the glass. He is clearly using them as a prop to indicate his intelligence.

You can tell how short or long sighted people are by looking at the faces through the glasses. Short sighted people’s eyes look smaller behind their glasses. Also if you look where the edge of their face sits behind the lens the face will appear to go inwards and not line up with the face edge above and below the glasses frame.

Long sighted people’s glasses look different. Their eyes look larger. The side of there face is wider behind the glasses. Almost extending out beyond the spectacles lens.

These amounts vary depending on how good or bad their eyesight is. I don’t know when I noticed all of this, but I think it goes back to seeing flat lenses in a film…