PSYC*2650 Chapter 3: Visual Perception Flashcards
What is akinetopsia
A disorder causing disruption of movement perception, with other aspects of perception still intact
T or F: Much of what people perceive is distorted and missing information.
True
In what order does light travel through the eye?
- Light hits the surface of the eyeball
- Passes through the cornea and lens
- Then hits the retina
What is the cornea?
The transparent tissue at the front of each eye
What role do the cornea and lens work together to perform?
Work together to focus incoming light
What is the lens?
The transparent tissue located at near the front of each eye
When muscles tighten, the lens bulges, creating the proper shape for focusing on ________ objects.
Nearby
When muscles relax, the lens flattens, creating the proper shape for focusing on ________ objects.
Farther
What is the role of the iris?
Opens and closes to control the amount of light that reaches the retina
What is the retina?
Light-sensitive tissue that lines the back of the eyeball
What are the three layers that make up the retina?
- Photoreceptors
- Bipolar cells
- Ganglion cells
What is the fovea?
The centre of the retina
Which region of the eye has the best acuity?
The fovea
Does the fovea contain more cones or rods?
Cones
T or F: The centre of the fovea has some rods, but not many.
False. The centre of the fovea has no rods.
What are photoreceptors?
Specialized neural cells that respond directly to incoming light
What are the two types of photoreceptors?
- Rods
- Cones
Which type of photoreceptor is more sensitive to light?
Rods
Which type of photoreceptor is unable to discriminate hues?
Rods
Which type of photoreceptor has relatively poor acuity?
Rods
Which type of photoreceptor needs more light to operate?
Cones
Which type of photoreceptor is able to discriminate hues?
Cones
Which type of photoreceptor has a high acuity?
Cones
How do cones detect colour?
There are three types of cones, each having their own pattern of sensitivities to different wavelengths produced by different colours