Vision and The Brain (Complete)
Basic light properties
kind of like particles and waves
Photon: Particle of light that behaves like waves
Transverse (up and down) waves
Light can be
absorbed into things
reflect off surface
Black (absorbs) White (Reflects)
A process by which photons are taken in
Refraction: bending of light (like in water)
Diffraction (or scattering): Coming in from a single point and scattered (like
with a prism)
Light & Color
Color doesn't exist in the world (property of the nervous system)
Light from the sun exists in many different wavelengths
Color perceived is based on which wavelengths get absorbed and which ones
get reflected
we cannot see what’s absorbed
we see what is reflected
Wavelengths: Distance between waves in a light wave
Longer to short: red, orange, yellow, green, blue, violet
Infrared is shorter
ultraviolet is longer
Vision and The Brain (Complete) 1
, Color mixing
Subtractive: Mixing pigments like paint → fewer wave lengths thank the
original
Additive: mixing together lights → more wavelengths being sent back than the
original
Camera Obscura
Light reflects off object and goes into small hole in camera
leaves an image, but is flipped upside down
Bigger aperture (hole) makes a blurrier image
smaller aperture (hole) makes a more crisp image
Human Eye Anatomy
Pupil acts as aperture
allows light to pass through and refocuses them to make an image on our
retina
as light comes in it is refracted
Cornea: Clear covering over eye, doesn't really move(Static)
Aperture: the pupil, dynamic and involuntary,
lens: Behind pupil, Bynamic & voluntary, is moved and shaped depending on
what were focusing on
look into what it does depending on focusing distances
cornea: at the back
Cornea: made of rods & cones, above the fovea
Fovea: Directly behind the lens (zero degrees), mostly cones
Optic disc: where the optic nerve enters the eye, Below the fovea, Where
the blind spot is, cable of axons
back of the eye has some coloring to absorb extra light
Vision and The Brain (Complete) 2
Basic light properties
kind of like particles and waves
Photon: Particle of light that behaves like waves
Transverse (up and down) waves
Light can be
absorbed into things
reflect off surface
Black (absorbs) White (Reflects)
A process by which photons are taken in
Refraction: bending of light (like in water)
Diffraction (or scattering): Coming in from a single point and scattered (like
with a prism)
Light & Color
Color doesn't exist in the world (property of the nervous system)
Light from the sun exists in many different wavelengths
Color perceived is based on which wavelengths get absorbed and which ones
get reflected
we cannot see what’s absorbed
we see what is reflected
Wavelengths: Distance between waves in a light wave
Longer to short: red, orange, yellow, green, blue, violet
Infrared is shorter
ultraviolet is longer
Vision and The Brain (Complete) 1
, Color mixing
Subtractive: Mixing pigments like paint → fewer wave lengths thank the
original
Additive: mixing together lights → more wavelengths being sent back than the
original
Camera Obscura
Light reflects off object and goes into small hole in camera
leaves an image, but is flipped upside down
Bigger aperture (hole) makes a blurrier image
smaller aperture (hole) makes a more crisp image
Human Eye Anatomy
Pupil acts as aperture
allows light to pass through and refocuses them to make an image on our
retina
as light comes in it is refracted
Cornea: Clear covering over eye, doesn't really move(Static)
Aperture: the pupil, dynamic and involuntary,
lens: Behind pupil, Bynamic & voluntary, is moved and shaped depending on
what were focusing on
look into what it does depending on focusing distances
cornea: at the back
Cornea: made of rods & cones, above the fovea
Fovea: Directly behind the lens (zero degrees), mostly cones
Optic disc: where the optic nerve enters the eye, Below the fovea, Where
the blind spot is, cable of axons
back of the eye has some coloring to absorb extra light
Vision and The Brain (Complete) 2
