42 Questions
What is the function of the choroid in the human eye?
To absorb light and prevent reflection
Which part of the eye contains rods for dim light and cones for bright light and color vision?
Retina
What is the function of the ciliary body in the human eye?
To change the lens shape for accommodation
Which part of the eye is responsible for maintaining the eyeball's shape?
Vitreous Humour
What is the role of the optic nerve in the human eye?
Transmitting impulses from the retina to the brain for image interpretation
What is the area of clearest vision with the highest concentration of cones?
Yellow Spot
Which visual defect causes blurred vision due to an uneven curvature of the cornea or lens?
Astigmatism
What is the point where the optic nerve leaves the eye, containing no photoreceptor cells?
Blind Spot
Which type of lens corrects the difficulty in seeing close objects clearly (Long-sightedness)?
Convex lenses
What is the process through which the eye changes the lens's shape to focus on near and distant objects?
Accommodation
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
What is the function of the vitreous humour in the human eye?
Maintains the eyeball's shape
Which layer of the human eye contains blood vessels, pigments, and helps prevent reflection of light?
Choroid
What is the primary role of the aqueous humour in the human eye?
Maintains the cornea's shape
Which part of the human eye is responsible for transforming light into electrical impulses?
Retina
What is the function of the sclera in the human eye?
Maintains inner structure of the eye
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
What is the primary function of binocular vision?
Providing depth perception
How does the eye adjust to focus on near objects?
Ciliary muscles contract, making the lens more convex
Which visual defect is corrected by wearing concave lenses?
Myopia
What is the main role of the pupillary mechanism?
Adjusting pupil size based on light levels
Which structure in the eye is responsible for clouding of the lens?
Lens
What happens to the pupil size in dim light conditions?
Pupil enlarges
How does the eye adapt when viewing objects further than 6 meters away?
Radial muscles relax, making the lens less convex
What is the visual defect characterized by difficulty in seeing close objects clearly?
Hyperopia
Which part of the human eye contains ciliary muscles that help change the lens's shape for accommodation?
Ciliary Body
What is the main function of the choroid in the human eye?
Supplies nutrients to the retina
Which layer of the human eye plays a minor role in light refraction?
Vitreous Humour
What is the primary function of the optic nerve in the human eye?
Transmits electrical impulses to the retina
Which part of the eye is responsible for protecting the inner eye structures and maintaining its shape?
Sclera
What is the function of the Aqueous Humour in the human eye?
Maintains cornea's shape
Which structure in the eye contains rods for dim light and cones for bright light and color vision?
Retina
What is the role of the Iris in controlling how much light enters the eye?
Controlling pupil size
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
What is the function of Vitreous Humour in maintaining vision?
Maintaining eyeball's shape and aiding in light refraction
What is the term used to describe the inability to see distant objects clearly and is corrected by wearing concave lenses?
Short-sightedness (Myopia)
Which part of the human eye adjusts the lens to focus on near objects by causing it to become more convex?
Ciliary muscles
What is the visual defect characterized by blurred vision due to an uneven curvature of the cornea or lens?
Astigmatism
Which structure in the eye controls the size of the pupil to regulate the amount of light entering?
Iris
What is the term for clouding of the lens leading to blurred vision, corrected by surgical removal and replacement with a synthetic lens?
Cataracts
Which part of the eye relaxes its radial muscles in dim light conditions to allow more light entry?
Radial muscles
What does binocular vision provide that helps in judging distance, depth, and object size?
Stereoscopic vision
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