Question 1

When you see colors and bright light,you are using the visual receptors known as
A)rods.
B)cones.
C)phosphenes.
D)stereocilia.

Accepted Answer

Cones are visual receptors responsible for detecting colors and bright light, they are more densely packed in the center of the retina and are responsible for high visual acuity. Rods are responsible for vision in dim light and are more densely packed in the periphery of the retina. Phosphenes refer to the experience of seeing light without a light source and stereocilia are sensory hair cells found in the inner ear. Therefore, the most appropriate answer is B, cones.

Question 2

The visual receptors that are used under dim light and produce only black and white sensations are the
A)rods.
B)cones.
C)phosphenes.
D)stereocilia.

Accepted Answer

Rods are the visual receptors in the retina that are most sensitive to dim light and are responsible for producing black and white sensations. Cones, on the other hand, are responsible for color vision and work best under bright light conditions. Phosphenes are the perceived flashes of light that occur in the absence of external stimuli, and stereocilia are hair-like structures in the inner ear that help with hearing.

Question 3

In bright light,visual acuity is greatest when the visual image falls on the
A)cornea.
B)fovea.
C)blind spot.
D)periphery of the retina.

Accepted Answer

The fovea is the central part of the retina that contains a high concentration of cone cells, which are responsible for color vision and high visual acuity. Therefore, visual acuity is greatest when the visual image falls on the fovea.

Question 4

Sam is being administered a test known as the Landolt rings.Which aspect of Sam's vision is being assessed?
A)night vision
B)visual acuity
C)color vision
D)depth perception

Accepted Answer

The Landolt rings test is a visual acuity test, which measures how well a person can see small details at a specific distance. The test involves a ring with a gap on one side, which is presented in different orientations to assess the person's ability to discriminate between different orientations of the gap. This test is commonly used in eye exams to assess vision and determine if a person needs corrective lenses.

Question 5

Visual acuity refers to which aspect of vision?
A)sharpness
B)brightness
C)color distinctions
D)depth perception

Accepted Answer

Visual acuity refers to the sharpness of vision, specifically the ability to distinguish detail at a distance. It is typically measured through the use of an eye chart or similar method. Brightness, color distinctions, and depth perception are all separate aspects of vision.

Question 6

Which of the following is NOT a test of visual acuity?
A)being able to detect a smallest grating seen as individual lines
B)the Snellen chart
C)the Landolt rings
D)the Ishihara test

Accepted Answer

The answer of Which of the following is NOT a...

Question 7

The cones of the retina
A)are responsible for peripheral vision.
B)are specialized for color sensations and fine details.
C)function best in dim light conditions.
D)are much more sensitive to light than the rods are.

Accepted Answer

Cones are responsible for color vision and detecting fine details. This is why they are concentrated in the central part of the retina, known as the fovea. Rods, on the other hand, are more sensitive to light and responsible for peripheral vision.

Question 8

The rods of the retina
A)number about 120 million in each eye and are found mainly in the periphery of the eye.
B)are specialized for color sensations and detecting fine details.
C)function best in bright light.
D)are characterized by all of these.

Accepted Answer

Rods number about 120 million in each eye and are found mainly in the periphery of the eye. They are specialized for detecting light in low levels, which is why they function best in dim light conditions. However, they do not provide color sensations and are not used for detecting fine details.

Question 9

Black and white vision with the greatest sensitivity under lower levels of illumination describes the function of the
A)cones.
B)rods.
C)phosphenes.
D)visual pigments.

Accepted Answer

Black and white vision is mainly due to the function of rods, which are specialized photoreceptor cells in the retina that are responsible for vision in low light conditions. Rods contain a pigment called rhodopsin, which has the greatest sensitivity under lower levels of illumination. Cones, on the other hand, are responsible for color vision and work best under bright light conditions. Phosphenes refer to the perception of light without an actual external stimulus and visual pigments are molecules that absorb light and trigger a signaling pathway in photoreceptor cells.

Question 10

The Snellen and the Landolt rings are used to assess
A)night vision.
B)visual acuity.
C)color vision.
D)depth perception.

Accepted Answer

The Snellen and Landolt rings are used to assess visual acuity, which is the ability to distinguish details and shapes of objects. Night vision, color vision, and depth perception are assessed through different tests.

Question 11

The small cup-shaped area in the middle of the retina that contains only cones is the
A)fovea.
B)cornea.
C)blind spot.
D)lens.

Accepted Answer

The small cup-shaped area in the middle of the retina that contains only cones is called the fovea. It is responsible for sharp central vision, color vision, and visual acuity. The cornea is the outermost layer of the eye that helps to focus light onto the retina. The blind spot is the area in the retina where the optic nerve exits and contains no photoreceptor cells. The lens is a transparent structure located behind the iris that helps to focus light onto the retina.

Question 12

Which receptor cells produce color sensations and fine details,work best in bright light,and lie mainly at the center of the eye?
A)phosphenes
B)rods
C)cones
D)stereocilia

Accepted Answer

Cones are the receptor cells that produce color sensations and fine details, they work best in bright light, and are mainly located at the center of the eye (in the fovea). Phosphenes are the perceptual experience of seeing lights or colors when there is no light entering the eye. Rods are receptor cells that are responsible for vision in low-light conditions and do not provide color information. Stereocilia are hair-like structures found in the inner ear that are involved in hearing.

Question 13

Like high-resolution digital sensors that are made of many small pixels,the tightly packed cones in which part of the eye produce the sharpest images?
A)iris
B)pupil
C)cornea
D)fovea

Accepted Answer

The fovea is a small, central area of the retina that contains a high density of cones. Cones are photoreceptor cells responsible for color vision and sharp visual acuity. The tightly packed cones in the fovea allow for the production of the sharpest images, just like high-resolution digital sensors made of small pixels. The iris is responsible for controlling the amount of light that enters the eye, the pupil is the opening in the center of the iris through which light enters the eye, and the cornea is the clear outer layer of the eye that aids in focusing light onto the retina. However, none of these parts of the eye are directly responsible for producing sharp images.

Question 14

Jake is being administered a test of his visual acuity in which he will be required to read rows of letters of diminishing size until he can no longer distinguish them.Jake's visual acuity is being assessed using the
A)Refraction Test.
B)Ishihara test.
C)Landolt rings.
D)Snellen chart.

Accepted Answer

The Snellen chart is specifically designed to assess visual acuity by requiring the individual to read rows of letters of diminishing size. The other options (Refraction Test, Ishihara test, Landolt rings) are tests that may also assess visual function, but they are not specifically designed to assess visual acuity.

Question 15

The rods of the retina
A)are densely packed in an area called the fovea.
B)are specialized for color sensations.
C)function best in dim light.
D)are specialized for picking up on fine detail.

Accepted Answer

Rods are specialized for vision in low light conditions, making them function best in dim light. They are not concentrated in the fovea, which is primarily composed of cones that are responsible for color vision and fine detail.

Question 16

Damage to the fovea in each eye could be expected to impair one's
A)visual acuity.
B)peripheral vision.
C)night vision.
D)black-and-white vision.

Accepted Answer

The fovea is responsible for sharp and detailed vision, so damage to it would impair visual acuity (ability to see clearly and sharply). Peripheral vision, night vision, and color vision are not primarily controlled by the fovea.

Question 17

A receiver runs down field,turns,and focuses on the tiny "missile" spiraling down to him.This receiver's ability to see the football emphasizes his excellent visual acuity due to the fovea of his eyes having a large concentration of
A)rods.
B)cones.
C)phosphenes.
D)stereocilia.

Accepted Answer

Cones are responsible for color vision and visual acuity, which is the ability to see fine details. The fovea contains a high concentration of cones, making it the area of the retina with the best visual acuity. Therefore, the receiver's ability to see the football is due to his fovea having a high concentration of cones.

Question 18

If you have 20/20 visual acuity,then you have
A)myopia.
B)hyperopia.
C)astigmatism.
D)normal vision.

Accepted Answer

20/20 visual acuity is considered normal vision. It means that at a distance of 20 feet, you can see letters or symbols that are 0.9mm in size.

Question 19

Visual acuity is sharpest when images are focused on the fovea because there is a high concentration of which of the following in this region?
A)rods
B)cones
C)ganglion cells
D)bipolar cells

Accepted Answer

The fovea contains a high concentration of cone cells, which are responsible for sharp, detailed vision and color perception. The concentration of rods, ganglion cells, and bipolar cells is lower in this region.

Question 20

Normal visual acuity is designated as _____ vision.
A)20/100
B)20/40
C)20/20
D)20/10

Accepted Answer

Normal visual acuity is designated as 20/20 vision, meaning that a person can see at 20 feet what a person with normal vision can see at 20 feet.

Quiz 19: Sensation and Perception: Vision

When you see colors and bright light,you are using the visual receptors known as

The visual receptors that are used under dim light and produce only black and white sensations are the

In bright light,visual acuity is greatest when the visual image falls on the

Sam is being administered a test known as the Landolt rings.Which aspect of Sam's vision is being assessed?

Visual acuity refers to which aspect of vision?

Which of the following is NOT a test of visual acuity?

The cones of the retina

The rods of the retina

Black and white vision with the greatest sensitivity under lower levels of illumination describes the function of the

The Snellen and the Landolt rings are used to assess

The small cup-shaped area in the middle of the retina that contains only cones is the

Which receptor cells produce color sensations and fine details,work best in bright light,and lie mainly at the center of the eye?

Like high-resolution digital sensors that are made of many small pixels,the tightly packed cones in which part of the eye produce the sharpest images?

Jake is being administered a test of his visual acuity in which he will be required to read rows of letters of diminishing size until he can no longer distinguish them.Jake's visual acuity is being assessed using the

The rods of the retina

Damage to the fovea in each eye could be expected to impair one's

A receiver runs down field,turns,and focuses on the tiny "missile" spiraling down to him.This receiver's ability to see the football emphasizes his excellent visual acuity due to the fovea of his eyes having a large concentration of

If you have 20/20 visual acuity,then you have

Visual acuity is sharpest when images are focused on the fovea because there is a high concentration of which of the following in this region?

Normal visual acuity is designated as _____ vision.