Both my parents have a natural tan and dark brown hair and eyes, but I have really pale green and lilac eyes and ash blonde hair, and my skin is really light. I dont understand how though because my brother has the same hair, eyes and skin as our parents and no one in my family has green eyes, everyone else has dark blue, or brown eyes. Also i didnt know that people could even have lilac eyes.

I dont think this has anything to do with my eye colour but i have double (and blurred) vision, and photophobia aswell.

Why we feel sleepy when we close our eyes

I love cooking with my son, as does he... he's four.  However, my eyes sting badly and I weep when cutting onions (which puzzles him; he thinks I'm upset)... his eyes standing right next to me are fine.

I seem to recall it was similar when cooking with my Mum when I was small; her eyes would sting and mine would not. I'm assuming it's not just my son and I... Is it something that develops when we grow up?

Two issues about this... a) if so, why? and b) surely, it's evolutionarily unhelpful... I can't use a knife when my eyes are stinging too much to keep them open; his eyes are fine, but he's too small to use a knife safely!

I am short-sighted; if the light from a distant object is bouncing off a mirror into my eyeball, why is it that I still see the object as if I was viewing it without glasses? I imagine the mirror to be "re-emitting" the original light, and if the distance between me and the mirror is equal too or less than that of what allows me to see things without correction, I would be seeing it as clearly as if it were the same distance to me and the object as it is to me and the mirror.

As you age, it is said people will generally become longsighted and will develop a positive prescription. 

If you are already short sighted, and have a negative prescription, does this mean as you age and develop long sighted-ness, that your eyesight will improve as your eyesight becomes more positive?

For example the pupil in an eye, is it 360 degrees? And freckles how come they are not square or triagle - is a circle an easy shape for DNA to generate? If so is there a way of writing it such as a formula?

My mum says that if I read under the bedclothes using a torch (flashlight) I will damage my eyesight. I told her that's a myth, but am I right?