Welcome to science! Today we'll be learning about the eyeball.
THE HUMAN EYE By: Erin Roach
THE HUMAN EYE
This is what the human eye looks like. A little bit creepy.
The parts of the eye are: Iris: The part of your eye that has colour in it. Pupil: The black circle within the Iris. This is what allows light to get into your eye. Lens: A clear plate directly behind the iris that bends light onto the retina. It changes shapes based on how far away you’re focused on. Cornea: Small “dome” over iris that serves a similar purpose as the lens. Sclera: The white part of your eye. Vitreous: The semi-solid substance that fills empty space within your eye. Conjunctiva: A small layer covering your visible sclera and eyelid edges. Optic Nerve: Connection from what your eyes see to the brain. Retina: Images are reflected onto the retina, which then helps decipher the image and “prepare” it to be sent to the brain. Macula: Helps to see what’s directly before you, like a book, or your desk at school.
Presbyopia: When people get older, their lens isn't able to move/change as much as it used to, making words in small fonts hard to read.
Hyperopia (farsightedness): When people can't form images well enough (a problem with their lens), they may not be able to see close-up very well.
Myopia (nearsightedness) : When people can't form images correctly due to a lens problem, they may not be able to see farther distances very well.
In most cases, these problems can be fixed with contact lenses, glasses, or even surgery! .....
OH! That went quickly! Class dismissed! Have a great weekend!