Week 7

Question 1

Light

Answer 1

Discrete particles of energy, photons or waves of electromagnetic energy. Visible spectrum 380-760 nm

Question 2

Transduction

Answer 2

Conversion of one form of energy to another.

Question 3

Wavelength

Answer 3

Perception of colour

Question 4

Amplitude

Answer 4

Perception of brightness; intensity

Question 5

Achromatic colour

Answer 5

Black-lack of light

White-intense equal mix of wavelengths

Grey-equal wavelengths with less intensity

Question 6

Chromatic colour

Answer 6

Depends on wavelengths that a stimulus REFLECTS into the eye.

Most objects ABSORB different wavelengths and reflect the rest.

Question 7

Monocular visual field

Answer 7

Visible to one eye, mapped using perimetry, subdivided into hemifields and quadrants.
-contains one blindspot (temporal hemifield)

Question 8

Binocular visual field

Answer 8

Area of overlap between monocular fields

Question 9

Eye positions

Answer 9

Convergence-eyes converge for close objects

Each point of visual field project to corresponding points on 2 retinas

Question 10

Binocular fusion

Answer 10

Comes fr retinal disparity, constructs 3D perception fr 2 slightly different 2D retinal images.

Helps w spatial orientation and perception of distance.

Question 11

2 visual systems

Answer 11

Form perception and visual acuity.
Peripheral vs central vision
Achromatic vs colour vision
Scotopic vs phototopic
Low levels bs high level illumination 
Rods vs cones

Question 12

Cornea

Answer 12

Where light first enters eye.

Spherical outer covering of eye (astigmatism-not spherical)

Works w lens to bend light onto retina.

15% of outer eye, can’t bend shape.