Dialogue

1 Intro| visible objects. But when the visual ray goes forth into the
2 Intro|       to the particles of the visual ray which meet them from
3 Intro|       larger and contract the visual ray, a black colour is produced;
4 Timae|       left right, because the visual rays come into contact with
5 Timae|     is smooth and divides the visual ray, and for this reason
6 Timae|  white that which dilates the visual ray, and the opposite of