WYSIWYG and Eye Anatomy 3.2.1 Flashcards
What is amplitude?
Height of a wavelength. Helps understand the brightness of color
What is astigmatism?
A condition that causes blurred vision due to an irregularly shaped cornea or lens
can be fixed with glasses, contact lenses, and surgery
What is a blind spot?
The region of the retina where the optic nerve connects does not contain any light-sensitive cells.
(this part of the retina cannot see)
What is color blindness?
When a person lacks the ability to interpret red or green or sometimes both.
(vision is unaffected, but it is unable to distinguish the difference)
What are cones?
What helps you see color, located toward the center of the retina
works best in lights, detects fine details
What is the cornea?
The protective covering through which light enters the eye
(covers the pupil and the iris)
What is the electromagnetic spectrum?
A range of frequencies of electromagnetic radiation.
What is fovea(fovea centrali)?
An indentation in the center of the retina that has the highest concentration of cones
This is the highest area of visual focus.
What is hyperopia(farsightedness)?
A vision condition is when a person can see distant objects but cannot focus on closer objects
Image is formed behind the retina
hyper = beyond
What is an iris?
The colored tissue that opens and closes the pupil
(constricts or dilates in response to the intensity of incoming light)
What are lenses?
Focuses the light that enters the eye through the pupil into an image on the retina
What is myopia (nearsightedness)?
A vision condition where a person can see closer objects but has trouble seeing things far away
image is formed in the front of the rentia
(my=close to me)
What is the optic nerve?
Carries the information received from the retina to the brain
What is the period?
The time it takes to complete one cycle of the wave.
What is the pupil?
An adjustable opening within the iris through which light passes before reaching the lens.
What is the retina?
Space along the back of the eye that contains layers of receptor cells
activated by light
It’s light sensitive, contains neurons essential for visual transduction
What are rods?
Are sensitive to light levels and help people see better in low light
Are receptors that detect movement
What is the visible spectrum?
Portion of wavelengths that are visible to the human eye
ex. colors of the rainbow
What is visual transduction?
When the light receptors present within the eye transmit signals to the brain, it produces familiar sensations of color.
happens automatically
transduction = transportation (information)
What is wavelength?
Distance between two peaks in a wave (varies according to the energy)
Associated with color (hue)
What are the characteristics of light that help determine the color of objects?
Wavelength and amplitude
What is hue?
Hue is color
What processes visual input?
occipital lobe
