Lecture 5 Part 2. Visual System

Question 1

Visual system does not produce

Answer 1

internal copy of external world

Question 2

eyes are tricked of into seeing things the way they aren’t; regarded as minor imperfection on one’s vision

Answer 2

Visual Illusion

Question 3

electromagnetic radiation that can be perceived by human eye

Answer 3

Light

Question 4

Light is viewed as

Answer 4

either discrete particles of energy (photons) or as waves of energy

Question 5

light is sometimes defined as

Answer 5

waves of electromagnetic energy between 380-760 nm

Question 6

2 Notable Properties of Light

Answer 6

Wavelength and intensity

Question 7

plays an important role in the perception of color

Answer 7

wavelength

Question 8

plays an important role in the perception of brightness

Answer 8

intensity

Question 9

the amount of light reaching the retinas is regulated by

Answer 9

the iris

Question 10

donut shaped bands of contractile tissue

Answer 10

Iris

Question 11

How light enters?

Answer 11

through the pupil or the hole in the iris

Question 12

Adjustment of pupil size in response to changes in illumination represents a compromise between..

Answer 12

Sensitivity and Acuity

Question 13

Ability to detect the presence of dimly lit objects

Answer 13

Sensitivity

Question 14

ability to see the details of objects

Answer 14

Acuity

Question 15

When does Constriction of Pupil happens?

Answer 15

During high level of illumination

Question 16

What happens on the image falling on each retina in constriction of pupils?

Answer 16

image falling on each retina is sharper and there is a greater depth of focus

Question 17

How does Dilation of Pupils happen?

Answer 17

During too low level of illumination to activate the receptors

Question 18

Acuity and depth of focus in dilation of pupils are?

Answer 18

sacrificed to see

Question 19

Location of Lens

Answer 19

behind each pupil

Question 20

focuses incoming light on the retina

Answer 20

Lens