Revise later
SpaceTo flip
If confident
All Flashcards
What is wavelength?
Distance between wave peaks/troughs; determines hue (color).
What is amplitude?
Height of a wave; determines intensity (brightness).
What is hue?
The color we perceive, determined by wavelength.
What is intensity?
The brightness of a color, determined by amplitude.
What is the cornea?
The eye's protective outer layer that bends light to focus.
What is the pupil?
An opening in the eye controlled by the iris that adjusts to light intensity.
What is the iris?
A muscle that controls the size of the pupil.
What is the lens?
Focuses light onto the retina, changing shape through accommodation.
What is the retina?
Where transduction happens; contains rods and cones.
What are photoreceptors?
Rods and cones in the retina that transduce light energy.
What are rods?
Photoreceptors for peripheral vision, black/white/gray, dim light.
What are cones?
Photoreceptors for central vision, color, fine details, bright light.
What is the optic nerve?
Carries visual signals from the retina to the thalamus.
What is the optic chiasm?
Where optic nerves cross, sending information to opposite hemispheres.
What is transduction?
Conversion of sensory stimuli into neural impulses.
What is accommodation?
The lens changing shape to focus on objects at different distances.
What is parallel processing?
Brain divides visual scenes into aspects and works on them simultaneously.
What is the path of light through the eye?
Cornea -> Pupil -> Lens -> Retina -> Optic Nerve -> Thalamus -> Visual Cortex
What is the process of transduction in the retina?
Light energy is converted into neural impulses by rods and cones.
What is the effect of short vs. long wavelengths on color perception?
Short wavelengths = purple; long wavelengths = red.
What is the effect of different light intensities on the pupil?
Bright light = small pupil; dim light = large pupil.
What causes the blind spot, and why don't we notice it?
Optic nerve leaves the eye; brain fills in the gaps.
What is the effect of lacking certain color receptors?
Colorblindness (monochromatic or dichromatic).