CH 6: Human Eye

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What is the function of the choroid in the human eye?

To absorb light and prevent reflection (correct)

To control the pupil size

To change the lens shape for accommodation

To transmit impulses from the retina to the brain

Which part of the eye contains rods for dim light and cones for bright light and color vision?

Retina (correct)

Iris

Lens

Cornea

What is the function of the ciliary body in the human eye?

To maintain the cornea's shape

To transform light into electrical impulses

To change the lens shape for accommodation (correct)

To control the pupil size

Which part of the eye is responsible for maintaining the eyeball's shape?

Vitreous Humour Signup and view all the answers

What is the role of the optic nerve in the human eye?

Transmitting impulses from the retina to the brain for image interpretation Signup and view all the answers

What is the area of clearest vision with the highest concentration of cones?

Yellow Spot Signup and view all the answers

Which visual defect causes blurred vision due to an uneven curvature of the cornea or lens?

Astigmatism Signup and view all the answers

What is the point where the optic nerve leaves the eye, containing no photoreceptor cells?

Blind Spot Signup and view all the answers

Which type of lens corrects the difficulty in seeing close objects clearly (Long-sightedness)?

Convex lenses Signup and view all the answers

What is the process through which the eye changes the lens's shape to focus on near and distant objects?

Accommodation Signup and view all the answers

Which part of the eye is responsible for controlling the size of the pupil to regulate the amount of light entering the eye?

Ciliary Body Signup and view all the answers

What is the function of the vitreous humour in the human eye?

Maintains the eyeball's shape Signup and view all the answers

Which layer of the human eye contains blood vessels, pigments, and helps prevent reflection of light?

Choroid Signup and view all the answers

What is the primary role of the aqueous humour in the human eye?

Maintains the cornea's shape Signup and view all the answers

Which part of the human eye is responsible for transforming light into electrical impulses?

Retina Signup and view all the answers

What is the function of the sclera in the human eye?

Maintains inner structure of the eye Signup and view all the answers

Which part of the human eye plays a significant role in changing the lens's shape for accommodation to focus on different distances?

Ciliary Body Signup and view all the answers

What is the primary function of binocular vision?

Providing depth perception Signup and view all the answers

How does the eye adjust to focus on near objects?

Ciliary muscles contract, making the lens more convex Signup and view all the answers

Which visual defect is corrected by wearing concave lenses?

Myopia Signup and view all the answers

What is the main role of the pupillary mechanism?

Adjusting pupil size based on light levels Signup and view all the answers

Which structure in the eye is responsible for clouding of the lens?

Lens Signup and view all the answers

What happens to the pupil size in dim light conditions?

Pupil enlarges Signup and view all the answers

How does the eye adapt when viewing objects further than 6 meters away?

Radial muscles relax, making the lens less convex Signup and view all the answers

What is the visual defect characterized by difficulty in seeing close objects clearly?

Hyperopia Signup and view all the answers

Which part of the human eye contains ciliary muscles that help change the lens's shape for accommodation?

Ciliary Body Signup and view all the answers

What is the main function of the choroid in the human eye?

Supplies nutrients to the retina Signup and view all the answers

Which layer of the human eye plays a minor role in light refraction?

Vitreous Humour Signup and view all the answers

What is the primary function of the optic nerve in the human eye?

Transmits electrical impulses to the retina Signup and view all the answers

Which part of the eye is responsible for protecting the inner eye structures and maintaining its shape?

Sclera Signup and view all the answers

What is the function of the Aqueous Humour in the human eye?

Maintains cornea's shape Signup and view all the answers

Which structure in the eye contains rods for dim light and cones for bright light and color vision?

Retina Signup and view all the answers

What is the role of the Iris in controlling how much light enters the eye?

Controlling pupil size Signup and view all the answers

What is the purpose of having a transparent, convex surface like the Cornea at the front of the eye?

Allowing light to pass through for refraction Signup and view all the answers

What is the function of Vitreous Humour in maintaining vision?

Maintaining eyeball's shape and aiding in light refraction Signup and view all the answers

What is the term used to describe the inability to see distant objects clearly and is corrected by wearing concave lenses?

Short-sightedness (Myopia) Signup and view all the answers

Which part of the human eye adjusts the lens to focus on near objects by causing it to become more convex?

Ciliary muscles Signup and view all the answers

What is the visual defect characterized by blurred vision due to an uneven curvature of the cornea or lens?

Astigmatism Signup and view all the answers

Which structure in the eye controls the size of the pupil to regulate the amount of light entering?

Iris Signup and view all the answers

What is the term for clouding of the lens leading to blurred vision, corrected by surgical removal and replacement with a synthetic lens?

Cataracts Signup and view all the answers

Which part of the eye relaxes its radial muscles in dim light conditions to allow more light entry?

Radial muscles Signup and view all the answers

What does binocular vision provide that helps in judging distance, depth, and object size?

Stereoscopic vision Signup and view all the answers

CH 6: Human Eye

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Questions and Answers

What is the function of the choroid in the human eye?

Which part of the eye contains rods for dim light and cones for bright light and color vision?

What is the function of the ciliary body in the human eye?

Which part of the eye is responsible for maintaining the eyeball's shape?

What is the role of the optic nerve in the human eye?

What is the area of clearest vision with the highest concentration of cones?

Which visual defect causes blurred vision due to an uneven curvature of the cornea or lens?

What is the point where the optic nerve leaves the eye, containing no photoreceptor cells?

Which type of lens corrects the difficulty in seeing close objects clearly (Long-sightedness)?

What is the process through which the eye changes the lens's shape to focus on near and distant objects?

Which part of the eye is responsible for controlling the size of the pupil to regulate the amount of light entering the eye?

What is the function of the vitreous humour in the human eye?

Which layer of the human eye contains blood vessels, pigments, and helps prevent reflection of light?

What is the primary role of the aqueous humour in the human eye?

Which part of the human eye is responsible for transforming light into electrical impulses?

What is the function of the sclera in the human eye?

Which part of the human eye plays a significant role in changing the lens's shape for accommodation to focus on different distances?

What is the primary function of binocular vision?

How does the eye adjust to focus on near objects?

Which visual defect is corrected by wearing concave lenses?

What is the main role of the pupillary mechanism?

Which structure in the eye is responsible for clouding of the lens?

What happens to the pupil size in dim light conditions?

How does the eye adapt when viewing objects further than 6 meters away?

What is the visual defect characterized by difficulty in seeing close objects clearly?

Which part of the human eye contains ciliary muscles that help change the lens's shape for accommodation?

What is the main function of the choroid in the human eye?

Which layer of the human eye plays a minor role in light refraction?

What is the primary function of the optic nerve in the human eye?

Which part of the eye is responsible for protecting the inner eye structures and maintaining its shape?

What is the function of the Aqueous Humour in the human eye?

Which structure in the eye contains rods for dim light and cones for bright light and color vision?

What is the role of the Iris in controlling how much light enters the eye?

What is the purpose of having a transparent, convex surface like the Cornea at the front of the eye?

What is the function of Vitreous Humour in maintaining vision?

What is the term used to describe the inability to see distant objects clearly and is corrected by wearing concave lenses?

Which part of the human eye adjusts the lens to focus on near objects by causing it to become more convex?

What is the visual defect characterized by blurred vision due to an uneven curvature of the cornea or lens?

Which structure in the eye controls the size of the pupil to regulate the amount of light entering?

What is the term for clouding of the lens leading to blurred vision, corrected by surgical removal and replacement with a synthetic lens?

Which part of the eye relaxes its radial muscles in dim light conditions to allow more light entry?

What does binocular vision provide that helps in judging distance, depth, and object size?

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