Eye Flashcards
What is the primary function of the eye?
To detect light and convert it into neural signals for vision.
What part of the eye controls the amount of light that enters?
The iris.
True or False: The cornea is responsible for most of the eye’s focusing power.
True.
Fill in the blank: The __________ is the transparent layer covering the front of the eye.
cornea.
What is the role of the retina?
To convert light into electrical signals for the brain.
What are the two types of photoreceptor cells in the retina?
Rods and cones.
What is the function of rods in the eye?
To detect light intensity and enable vision in low light.
What is the function of cones in the eye?
To detect color and provide sharp vision in bright light.
True or False: The fovea is the area of the retina with the highest concentration of rods.
False.
What is the blind spot?
The area of the retina without photoreceptors where the optic nerve exits the eye.
What is the aqueous humor?
The fluid in the anterior chamber of the eye that helps maintain intraocular pressure.
What structure is responsible for focusing light onto the retina?
The lens.
What is the condition called when the eye is too long, causing myopia?
Nearsightedness.
What is the condition called when the eye is too short, causing hyperopia?
Farsightedness.
Fill in the blank: The __________ connects the eye to the brain.
optic nerve.
What is the vitreous humor?
The gel-like substance that fills the eye and helps maintain its shape.
What is the role of the pupil?
To regulate the amount of light entering the eye.
True or False: The sclera is the colored part of the eye.
False.
What part of the eye is responsible for producing tears?
The lacrimal glands.
What is the role of the ciliary body?
To control the shape of the lens for focusing.
What is presbyopia?
A condition associated with aging where the eye loses the ability to focus on close objects.
What is astigmatism?
A refractive error caused by an irregularly shaped cornea or lens.
Fill in the blank: The __________ is the colored part of the eye.
iris.
What is the macula?
The area of the retina responsible for central vision.