Ok, first of all, I'm not smoking anything... I am seriously wondering, as I know very little about biology.
I was talking to my wife earlier about eyeballs, and she said that the black circle that is - as I understand it - called the "pupil", is actually a hole. I always thought it was a muscle of some kind, or a gland or whathaveyou, and that it expanded and stuff when reacting to light. Now I learn that the black circle is in fact a hole, through which the light - what we see - gets inside the eyeball, and the receptors at the other end of the eyeball "interpret" the light into an image...of sorts. Mind you, these technical terms are my words, not hers. Anyway, there's supposed to be just "eye goo" between the receptors and the pupil.
Now, here's my question. I assume that the reason the "hole", or pupil, is black, is because there is no light reflecting from inside the eyeball, so we cannot see in. Hence, my question: if it were possible to insert a needle into the eyeball and lead light into the inside of the eyeball through the needle, would a person looking at the eyeball, or specifically the pupil, see the light coming from inside the eyeball through the pupil, or would the pupil remain black?
I've included this nifty picture to demonstrate my question. See the eyeball, and then the ejection needle injecting light into the eyeball, the inside of it. Would the light then reflect outside of the pupil, making the pupil something other than just a black well of nothingness?
I ask such delightful questions. I've also wondered what the "eye goo" tastes like. But I don't expect you to know that. I always thought that they eyeball was thick white matter, such as a sliced egg without the yolk. I was told that there's just goo inside the eyeball. Fancy that.