Structure Of The Eye Flashcards
What is the outermost layer of the eye called?
Sclera
True or False: The cornea is responsible for most of the eye’s light refraction.
True
What structure in the eye adjusts to control the amount of light entering?
Iris
Fill in the blank: The _____ is the transparent front part of the eye that covers the iris and pupil.
Cornea
Which part of the eye contains photoreceptor cells?
Retina
What is the function of the lens in the eye?
To focus light onto the retina
Multiple Choice: What is the primary function of the pupil? A) To protect the eye B) To allow light to enter C) To focus images D) To provide color
B) To allow light to enter
What is the gel-like substance that fills the eye called?
Vitreous humor
True or False: The optic nerve transmits visual information from the retina to the brain.
True
Fill in the blank: The _____ is the colored part of the eye surrounding the pupil.
Iris
What is the purpose of the tear film?
To keep the eye moist and protect it from debris
Multiple Choice: Which part of the eye is responsible for sharp central vision? A) Retina B) Cornea C) Lens D) Macula
D) Macula
What is the role of the ciliary body?
To control the shape of the lens for focusing
True or False: The fovea is the area of the retina with the highest concentration of rods.
False
What is the blind spot in the eye?
The area on the retina where the optic nerve exits, lacking photoreceptors
Fill in the blank: The _____ is a thin layer of tissue that lines the inside of the eyelids and covers the white part of the eyeball.
Conjunctiva
What is the primary function of the rods in the retina?
To detect light and dark, contributing to night vision
Multiple Choice: Which part of the eye is responsible for color vision? A) Rods B) Cones C) Lens D) Iris
B) Cones
What is the aqueous humor?
The fluid in the front part of the eye that maintains intraocular pressure
True or False: The lens becomes thicker to focus on distant objects.
False
What is the primary function of the sclera?
To provide structure and protection to the eye
Fill in the blank: The _____ is the part of the eye that contains the highest density of cones.
Fovea
What is the role of the eyelids?
To protect the eye and spread tears across the surface
Multiple Choice: What type of vision do cones primarily contribute to? A) Night vision B) Peripheral vision C) Color vision D) Depth perception
C) Color vision
What is the function of the choroid layer?
To provide nourishment to the retina and absorb excess light
True or False: The pupil changes size in response to changes in light intensity.
True
What is the main function of the optic disc?
To serve as the point where the optic nerve leaves the eye, creating a blind spot
