The four readings behind the name
Every named shape is a region in the same measurement space, so the tool reports the numbers as well as the name. If your reading sits on a boundary, you can see that for yourself rather than being handed a label.
- Openness: eye height divided by eye width. Around 0.42 and above reads as round
- Corner tilt: the angle from inner to outer corner. Above five degrees reads as upturned, below minus two as downturned
- Visible lid space: how much moving lid shows above the lash line, measured in eye opening heights
- Eye spacing: the intercanthal gap in eye widths. Roughly one eye width is the reference