EYE – Second Timers – v7

SEE THROUGH NERVES: After light passes through your pupil, then though your constantly moving lens, it immediately enters the vitreous humor liquid.  Then you bump into something.  What?

SEE THROUGH NERVES: At the back of your eye, light first hits the noodley nerves on top of the retina. It goes through them and hits the the ganglion cells. Then light hits the bipolar cells which the ganglion cells sit on top of.

SEE THROUGH NERVES:  Finally after going through the ganglion cells and the bipolar cells of the retina, light next hits the third nerve call layer, the rods and the cones.  In the rods and cones, light strikes different kinds of opsin protein molecules.  One kind is called rhodopsin.  These opsin proteins cause the rod and cone cells to send signals to the brain to enable you to see!   (You may have to research part of this question)

SEE THROUGH NERVES:  Scientists recently discovered that there are special clear cells that live in your retina that tunnel through the maze of nerve layers including the ganglion and bipolar cells.You have millions of these living clear tube cells which act like fiber optics. These fiber optic-like cells channel the light through the nerve maze of noodley nerves, the ganglion cells and the bipolar cells directly to your rods and cones. It makes it so the world doesn’t look fuzzy and dark to you!

FOVEAS: The fovea is a tiny, 1.5 inch dent in the back of your eye that over one million color-detecting cones are located in.  That’s an area the size of a little rock!

FOVEAS: When you look at anything like a rabbit on a hill, both your eyes’ tiny fovea must be perfectly aimed at it. Your eyes must be synchronized together so the fovea in each eye is aimed at the same thing. If your fovea weren’t aimed just right,  you’d have triple vision.

 FOVEAS: Though our fovea are tiny, they are the only part of our eye that we can see 20-20 with. We focus on tiny things like words on a page, someone’s individual hair strands or ants with it.  Half the messages going to our brains from our retina are from the fovea.  Our fovea are hugely important!  Without them, you couldn’t focus on anything!

FOVEAS: Birds have incredible fovea.  An eagle can focus in on a rabbit twenty miles away.  We can barely see a car!  They are able to do this because they have remarkably thin cells squished together in their fovea.  In the width of a pencil lead, an eagle can have one million cells!

FOVEAS: Hummingbirds and over half of all other other birds have three fovea in each eye.  These enable them to see three different places at the same time.  It’s like having 3 video cameras pointed in different directions! Handy!