[1]: See the account of various ancient doctrines of vision and the reflection of light in the treatise on the Opinions of Philosophers, Book IV. Chapters 13 and 14. The idea that vision was caused by something proceeding from the eye to the object is especially to be noticed. (G.)
[2]: The text in this passage is defective, and the sense chiefly conjectural. (G.)
[3]: Here again the text is defective, and the sense conjectural. (G.)
[4]: Otus and Ephialtes.