Eye Anatomy PDF

• • • shape • thinner/thinkat changes depending closer/firther • • • • • • color sones • • • • Anterior chamber: space filled with aqueous humour, which provides pressure to maintain shape of eyeball; allows nutrients and minerals to supply cells of cornea/iris. Pupil: the opening in the...

• • • shape • thinner/thinkat changes depending closer/firther • • • • • • color sones • • • • Anterior chamber: space filled with aqueous humour, which provides pressure to maintain shape of eyeball; allows nutrients and minerals to supply cells of cornea/iris. Pupil: the opening in the middle of the iris. The size of the pupil can get bigger/smaller based on the iris relaxing/contracting respectively. The pupil modulates the amount of light able to enter the eyeball. Iris: Gives the eye color. The muscle that constricts/relaxes to change the size of the2 dit pupil. Lens: bends the light so it goes to back of eyeball – focuses light specifically on the fovea of the retina. Adjust how much it bends the light by changing its shape, using the suspensory ligaments. Suspensory ligaments: attached to a ciliary muscle. These two things together form the ciliary body, what secrets the aqueous humor. Posterior chamber: area behind the iris to the back of lens; also filled with aqueous humor. Vitreous chamber: filled with vitreous humour, a jelly-like substance to provide pressure to eyeball and gives nutrients to inside of eyeball. Retina: inside, back area filled with photoreceptors, where the ray of light is converted from a physical waveform to a electrochemical impulse that the brain can interpret. Macula: special part of retina rich in cones, but there are also rods. Fovea: special part of macula. Completely covered in cones, no rods. *Rest of the retina is covered in primarily rods. Cones: Detect color and discern high level of detail in what you are observing. Cone shaped. Rods: Detect light. Rod shaped. Choroid – pigmented black in humans, is a network of blood vessels that helps nourish the retina. It black all light is absorbed. Some animals have a different colored choroid which gives them better night vision. Sclera – Usually absorbs by the time the light gets to this. The whites of the eye, thick fibrous tissue that covers posterior 5/6th of eyeball (cornea covers the anterior 1/6). Attachment point for muscles. Extra layer of protection and structure of eyeball. Lined with the conjunctiva. 18 muscles