Ibn al-Haytham, Optics. Book II, Chapter 3.  34.b.

Now the particular properties that can be perceived by the sense of sight are many,
but they fall in general into 22 divisions, namely :

light,
colour,
distance,
position,
solidity,
shape,
size,
separation,
continuity,
number,
motion,
rest,
roughness,
smothness,
transparency,
opacity,
shadow,
darkness,
beauty,
ugliness,
similarity,
dissimilarity

α          ?         ©