Ch 2 Flashcards
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
A quantum of visible light or other form of electromagnetic radiation demonstrating both particle and wave properties
Photon
To take up something such as light, noise, or energy and not transmit it at all
Absorb
To disperse something such as light in an irregular fashion
Scatter
To redirect something that strikes a surface especially light, sound, or heat usually back toward its point of origin
Reflect
To convey something from one place or thing to another
Transmit
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
A picture or likeness
Image
The transparent window into the eyeball
Cornea
Allowing light to pass through with no interruption, so that objects on the other side can be clearly seen
Transparent
The watery fluid in the anterior chamber of the eye
Aqueous humor
The len inside the eye that enables the changing of focus
Lens
The dark circular opening at the center of the iris in the eye where light enters the eye
People
The transparent fluid that fills the vitreous chamber in the posterior part of life
Vitreous humor
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
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
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
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
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
A visual defects caused by the unequal curving of one or more of the refractive surfaces of that I usually the cornea
Astigmatism
The process by which the eye changes its focus
Accommodation
Literally old site the age related loss of accommodation which makes it difficult to focus on near objects
presbyopia
An opacity of the crystalline lens
Cataract
To convert from one form of energy to another
Transduce
The back layer of the right now with the eye doctor sees through an ophthamoscope
Fund us
A light sensitive receptor in the retina
Photo receptor
A photo receptor specialized for night vision
Rod
A photo receptor specialized for fine vision acuity and color
Cone
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
The distance between the retinal image in the fovea
Eccentricity
The part of the photo receptor that contains photo pigment molecules
Outer segment
The part of the photo receptor that lies between the outer segment in the cell nucleus
Inner segment
The location where axons terminate at the synapse for transmission of information about the release of chemical transmitters
Synaptic terminal
Though eye-catching part of the visual pigment of the retina
Chromophore
The visual pigment found in rods
Rhodopsin
A photo pigment that is sensitive to ambient light
Melanopsin
I specialize retina so that context both photoreceptor and bipolar cells
Horizontal cell
Antagonistic neural interaction between adjacent regions of the retina
Lateral inhibition
A retinal cell found in the inner synaptic layer that makes synaptic contacts with bipolar cells ganglion cells and other amacrine cells
Amacrine cell
A wreck yourself that synapses with either rods or cones in with horizontal cells and then passes the signals onto ganglion cells
Bipolar cell
A bipolar retinal so who’s processes are spread out to receive input from multiple cones
Diffuse bipolar cell
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
A measure of the finest detail that can be resolved by the eyes
Visual acuity
Hey small bipolar cells in the central retinal that receives input from a single cone
Midget bipolar cell
A bipolar cell that response to an increase in light captured by the cones
On bipolar cell
