Ch 2 Flashcards Preview

Sen & Per > Ch 2 > Flashcards

Flashcards in Ch 2 Deck (45):
1

In oscillation that travels through a medium by transferring energy from one partical or point to another without causing any permanent displacement of the medium

Wave

2

A quantum of visible light or other form of electromagnetic radiation demonstrating both particle and wave properties

Photon

3

To take up something such as light, noise, or energy and not transmit it at all

Absorb

4

To disperse something such as light in an irregular fashion

Scatter

5

To redirect something that strikes a surface especially light, sound, or heat usually back toward its point of origin

Reflect

6

To convey something from one place or thing to another

Transmit

7

One to alter the course of a wave of energy that passes into something from another medium, as water does to light entering it from the air. Two to measure the degree of refraction in a lens or Eye

Refract

8

A picture or likeness

Image

9

The transparent window into the eyeball

Cornea

10

Allowing light to pass through with no interruption, so that objects on the other side can be clearly seen

Transparent

11

The watery fluid in the anterior chamber of the eye

Aqueous humor

12

The len inside the eye that enables the changing of focus

Lens

13

The dark circular opening at the center of the iris in the eye where light enters the eye

People

14

The transparent fluid that fills the vitreous chamber in the posterior part of life

Vitreous humor

15

A light sensitive membrane in the back of the eye that contains rods and cones, which receive an image from the lens and send it to the brain through optic nerve

Retina

16

The condition in which there is no refractive error, because the reflective power of the eye is perfectly matched to the length of the eyeball

Emmetropia

17

A unit of measurement of the optic power of the lens. It is equal to the reciprocal of the focal links, in meters. A 2 diopter lens will bring parallel rays of light into focus at half meter

Diopter

18

Nearsightedness, a common condition in which light entering the eye is focused in front of the retina and distant objects cannot be seen sharply

Myopia

19

Farsightedness a condition in which light entering the eye is focused behind the retina and accommodation is required in order to see near objects clearly

Hyperopia

20

A visual defects caused by the unequal curving of one or more of the refractive surfaces of that I usually the cornea

Astigmatism

21

The process by which the eye changes its focus

Accommodation

22

Literally old site the age related loss of accommodation which makes it difficult to focus on near objects

presbyopia

23

An opacity of the crystalline lens

Cataract

24

To convert from one form of energy to another

Transduce

25

The back layer of the right now with the eye doctor sees through an ophthamoscope

Fund us

26

A light sensitive receptor in the retina

Photo receptor

27

A photo receptor specialized for night vision

Rod

28

A photo receptor specialized for fine vision acuity and color

Cone

29

A small pit near the center of the macula that contains the highest concentration of cones and no rods it is the portion of the retina that produces the highest visual acuity and serves as the point of fixation

Phobia

30

The distance between the retinal image in the fovea

Eccentricity

31

The part of the photo receptor that contains photo pigment molecules

Outer segment

32

The part of the photo receptor that lies between the outer segment in the cell nucleus

Inner segment

33

The location where axons terminate at the synapse for transmission of information about the release of chemical transmitters

Synaptic terminal

34

Though eye-catching part of the visual pigment of the retina

Chromophore

35

The visual pigment found in rods

Rhodopsin

36

A photo pigment that is sensitive to ambient light

Melanopsin

37

I specialize retina so that context both photoreceptor and bipolar cells

Horizontal cell

38

Antagonistic neural interaction between adjacent regions of the retina

Lateral inhibition

39

A retinal cell found in the inner synaptic layer that makes synaptic contacts with bipolar cells ganglion cells and other amacrine cells

Amacrine cell

40

A wreck yourself that synapses with either rods or cones in with horizontal cells and then passes the signals onto ganglion cells

Bipolar cell

41

A bipolar retinal so who's processes are spread out to receive input from multiple cones

Diffuse bipolar cell

42

One the ability to perceive be at the sense organs to Extrem responsiveness to radiation especially to light of a specific wavelengths three the ability to respond to transmit signals

Sensitivity

43

A measure of the finest detail that can be resolved by the eyes

Visual acuity

44

Hey small bipolar cells in the central retinal that receives input from a single cone

Midget bipolar cell

45

A bipolar cell that response to an increase in light captured by the cones

On bipolar cell