Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/33

Click to flip

33 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)
Wavelength
the distance between adjacent waves of radiant energy; in vision, mostly associated with perceptual dimension of hue
Cornea
Transparent tissue that covers the front of the eye
Sclera
The tough outer layer of the eye.
The “white” of the eye
Iris
consists of two bands of muscle that control light emitted into the eye, and the size of the pupil
Aqueous humor
- protects and cushions much of the eye
Lens
lies immediately behind the iris, causes image to focus on the back of the eye
Accommodation
the act in which muscles change the shape of the lense to adjust for short distances or long distances
Retina
internal surface of the eye, performs sensory functions of the eyes.
Nearsighted
eyes are too long
Farsighted
eyes are too short
Photoreceptors
specialized neurons that transduces light into nueral activity
Optic disk
circular region of the retina where axons and ganglion cells exit the eye and form an optic nerve
Bipolar cells
transmitter substance receives from photoreceptors and passes to gonglion
Three Cell chain to the brain
photoreceptor> bipolar cell> ganglion cell> brain
Rods
function in dim light, insensitive to colors
Cones
need light for vision, function in color
Fovea
small pit that contains only cones, responsible for our detailed eyesight
Photopigment
two molecules combined together, when struck by photons it splits and sends a signal. The brighter the light the more bleached it is.
Rhodopsin
photopigment for rods, pink
Dark adaptation
adapting to the dark
Conjugate movements
both eyes focused on the same object, assist perception of distance
Saccadic movements
shift glaze abruptly from one point to the other, help us remember the spatial relationships between objects
Pursuit movements
track moving objects
Hue
determined by the wavelength
Brightness
determined by intensity of radiant energy emited by visual stimulus
Saturation
purity,
white light is completely desaturated
Color mixing
the addition of wavelegths
Trichromatic theory
theory that color vision is created by three main types of photoreceptors that are sensitive to specific wavelengths
Opponent Process
The representation of colors by the rate of firing two types of neurons: red/green and yellow/blue
Negative afterimage
The image seen after a portion of the retina is exposed to an intense visual stimulus; it consists of colors complementary to those of the original stimulus.
Protanopia
a form of hereditary anomalous color vision caused by defective “red” cones in the retina.
Deuternapia
Green cones are filed with red photopigment
Tritanopia
sees the world in green and reds