In the English Language section, this question was asked. I posted the beginnings of an answer, and invited others to comment so that I could edit my answer and improve it.
I'd like to know about the history of optics, and the field of optics. My questions:
- If someone today says they are in the field of optics, I would think that they work with lenses, light, lasers, etc. I would not think that they work with the human eye and the visual system. Is this true?
- At one time, it seems that the field of optics did include interest in how humans see. At what point did this interest in the eye start shifting to medicine and away from physics?
- Many sources say the ancients were interested in optical illusions. I cannot find what these were. What were they?