Question 1

Humans rely on which sense more than the others?

Accepted Answer

Humans rely more on vision than on any other sense. The visual system is highly developed, providing us with a vast amount of information about our environment, which is crucial for navigation, recognizing objects and people, and many other tasks.

Question 2

The lens of the human eye changes shape whenever

Accepted Answer

The lens of the human eye changes shape to focus on objects at different distances, a process known as accommodation. This is achieved through the contraction of the ciliary muscles, which alters the tension on the lens, making it more or less curved.

Question 3

The parts of the eye that make color vision and acuity possible are the

Accepted Answer

Cones are the photoreceptor cells in the retina of the eye responsible for color vision and high spatial acuity. They function best in relatively bright light, as opposed to rods, which work better in dim light.

Question 4

The process of maintaining clear retinal images in varying light conditions is

Accepted Answer

Accommodation is the process by which the eye changes optical power to maintain a clear image (focus) on an object as its distance varies. This involves the ciliary muscles adjusting the lens shape to focus light on the retina under varying distances, not specifically light conditions.

Question 5

The degree of detail that can be seen is referred to as

Accepted Answer

Acuity refers to the sharpness or clarity of vision, which directly relates to the degree of detail that can be seen.

Question 6

The Snellen eye chart is used to determine

Accepted Answer

The Snellen eye chart is specifically designed to evaluate static visual acuity, which is the ability to see details at a distance without moving the eyes or the chart.

Question 7

Clouding of the crystalline lens of the eye is known as

Accepted Answer

Clouding of the crystalline lens of the eye is known as cataracts. This condition leads to a decrease in vision and can develop due to aging, trauma, or other factors.

Question 8

The inability to focus clearly on near objects is clinically known as

Accepted Answer

Presbyopia is the condition associated with aging that results in the inability to focus clearly on close objects. It occurs due to the hardening of the lens inside the eye, which affects its ability to change shape (accommodate) for near vision.

Question 9

As we age, the drooping of the eyelid

Accepted Answer

The drooping of the eyelid with age is referred to as senile ptosis, and it can indeed limit vertical peripheral vision as the eyelid sags and covers more of the eye.

Question 10

The visual system needed to properly "track" an object is the

Accepted Answer

The ocular-motor system is responsible for controlling the movements of the eyes, which is essential for tracking objects as they move through the visual field. This system includes the coordination of eye muscles to ensure both eyes can follow an object smoothly and accurately.

Question 11

Factors that influence how well a person can make a motor response coincide with the arrival of an external object include all of the following EXCEPT

Accepted Answer

Object sound is not directly related to the ability to make a motor response coincide with the arrival of an external object. Factors like age, object speed, gender, and viewing time directly influence the coordination and timing of motor responses, while the sound of an object does not significantly affect this ability.

Question 12

The primary role of the Golgi tendon organs is to

Accepted Answer

Golgi tendon organs are sensory receptors located at the junctions of muscles and tendons. Their primary role is to detect changes in muscle tension, helping to protect muscles and tendons from excessive force by triggering a reflex that relaxes the muscle.

Question 13

People with Romberg's sign disease have a malfunction of the

Accepted Answer

Romberg's sign is indicative of a problem with proprioception, which involves sensory receptors in the soles of the feet and other areas, affecting balance when visual input is removed.

Question 14

One of the most common causes of loss of visual acuity among older adults is

Accepted Answer

Senile macular degeneration, also known as age-related macular degeneration (AMD), is a common cause of vision loss among older adults due to the deterioration of the macula, the central part of the retina responsible for sharp, central vision.

Question 15

Drusen is

Accepted Answer

Drusen are fatty deposits found in the retina, often associated with aging and age-related macular degeneration (AMD), not the cause of cataracts or diabetic retinopathy, nor are they related to new blood vessel growth within the retina.

Question 16

Which of the following is NOT true of wet age-related macular degeneration?

Accepted Answer

Wet age-related macular degeneration is not the most prevalent form; dry age-related macular degeneration is more common. Wet AMD is a more severe form that can lead to significant vision loss.

Question 17

In part, this carotenioid is designed to reduce oxidative stress within the retina

Accepted Answer

Lutein and zeaxanthin are carotenoids found in the retina that help reduce oxidative stress, protecting the eyes from damage. Metoprolol is a beta-blocker used to treat high blood pressure and is not related to eye health.

Question 18

In adulthood there is generally a 1% to 3% reduction in the visual field every

Accepted Answer

In adulthood, there is generally a 1% to 3% reduction in the visual field every 10 years. This gradual decline is part of the normal aging process of the eye.

Question 19

What do the following sentences refer to :
-Makes colorless night vision possible.

Accepted Answer

The answer of What do the following sentences refer to...

Question 20

What do the following sentences refer to :
-Legal definition of blindness.

Accepted Answer