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The Human Eye
The Human Eye definitions from science
Term | Definition |
---|---|
Cornia | Protects the lens and helps to focus light |
Anterior Chamber | contains aqueous (watery) humor |
Pupil | where the light enters our eyes, allows us to see |
Iris | controls the size of the pupil helping us see in different amounts of light |
Canal of Schlemm | drains aqueous humor from anterior chamber into blood stream |
Zonular Fibrils | carry forces from the ciliary bodies to help shape properly shape the lens |
Lens | helps focus light to the retina |
Ciliary Body | controls the shape of the lens |
Sclera | outer protective covering of the eye, continuous with the cornia |
Choroid | vascular layer of the eye, carries oxygen to cells and waste products away |
Retina | converts light to electrical energy |
Macula | region of the retina where light is focused, keenest vision is here, responsible for fine details for reading, color reception, driving a car, recognizing faces, etc. |
Optic Nerves | sends electrical signals to the brain |
Posterior Chamber | contains vitreous (glassy) humor |
Optic Disc | region where optic nerve extends to the brain, AKA "blind spot" |
Glaucoma | A condition in which internal eye pressure becomes too high, damaging the retina |
How do we maintain proper eye pressure? | By draining the humors of the eye properly, the canal of schlemm is key! |
Huygens Principle | Every point on a wave front acts as a distinct point source for light; distributing that light evenly in all directions |
Refraction | the bending of light through different objects/spaces |
Which way does light refract from less dense to more dense? | Toward the normal line |
Which way does light refract from more dense to less dense? | Away from the normal line |
Normal Line | The point where the light goes from on object/space to the new object/space, always perpendicular to the mid line |