WYSIWYG and Eye Anatomy 3.2.1 Flashcards

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1
Q

What is amplitude?

A

Height of a wavelength. Helps understand the brightness of color

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2
Q

What is astigmatism?

A

A condition that causes blurred vision due to an irregularly shaped cornea or lens

can be fixed with glasses, contact lenses, and surgery

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3
Q

What is a blind spot?

A

The region of the retina where the optic nerve connects does not contain any light-sensitive cells.

(this part of the retina cannot see)

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4
Q

What is color blindness?

A

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)

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5
Q

What are cones?

A

What helps you see color, located toward the center of the retina
works best in lights, detects fine details

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6
Q

What is the cornea?

A

The protective covering through which light enters the eye

(covers the pupil and the iris)

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7
Q

What is the electromagnetic spectrum?

A

A range of frequencies of electromagnetic radiation.

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8
Q

What is fovea(fovea centrali)?

A

An indentation in the center of the retina that has the highest concentration of cones

This is the highest area of visual focus.

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9
Q

What is hyperopia(farsightedness)?

A

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

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10
Q

What is an iris?

A

The colored tissue that opens and closes the pupil

(constricts or dilates in response to the intensity of incoming light)

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11
Q

What are lenses?

A

Focuses the light that enters the eye through the pupil into an image on the retina

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12
Q

What is myopia (nearsightedness)?

A

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)

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13
Q

What is the optic nerve?

A

Carries the information received from the retina to the brain

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14
Q

What is the period?

A

The time it takes to complete one cycle of the wave.

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15
Q

What is the pupil?

A

An adjustable opening within the iris through which light passes before reaching the lens.

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16
Q

What is the retina?

A

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

17
Q

What are rods?

A

Are sensitive to light levels and help people see better in low light

Are receptors that detect movement

18
Q

What is the visible spectrum?

A

Portion of wavelengths that are visible to the human eye

ex. colors of the rainbow

19
Q

What is visual transduction?

A

When the light receptors present within the eye transmit signals to the brain, it produces familiar sensations of color.

happens automatically

transduction = transportation (information)

20
Q

What is wavelength?

A

Distance between two peaks in a wave (varies according to the energy)

Associated with color (hue)

21
Q

What are the characteristics of light that help determine the color of objects?

A

Wavelength and amplitude

22
Q

What is hue?

A

Hue is color

23
Q

What processes visual input?

A

occipital lobe