In mythical fancies this stone played its part, for dragon’s eyes were said to be carbuncles.
The Curious Lore of Precious Stones by George Frederick Kunz, 1915.
A ring of bone surrounding the eye in many species of birds, fish, reptiles and amphibians.
Skulls: An Exploration of Alan Dudley’s Curious Collection by Simon Winchester, 2012.
Three guards against the evil eye:
The Annotated Dracula by Leonard Wolf, 1975.
Chazal. From The Viking Book of Aphorisms by W.H. Auden & Louis Kronenberger, 1962.
The god of eloquence and wisdom. He was the guardian of a well in which wit and wisdom lay hidden, and of which he drank every morning from the horn Gjallar. Odin once drank from this fountain, and by doing so became the wisest of gods and men; but he purchased the privilege and distinction at the cost of one eye, which Mimir exacted from him.
A Dictionary of the Noted Names in Fiction by William A. Wheeler, 1865.
Some have written that the Crocodile runneth away from a man if he winke with his left eye, and looke stedfastly uppon him with his right eye, but if this bee true, it is not to be attributed to the vertue of the right eye, but onely to the rareness of sight, which is conspicuous to the Serpent from one eye.
The Elizabethan Zoo - a book of Beasts Both Fabulous and Authentic, 1979. Selections from Pliny (1601) & Topsell (1607, 1608).