Parts of the Eye Flashcards

Questions and Answers

What is the function of the cornea?

Fills the eye with a jelly-like substance

Transmits electrical impulses to the brain

Protects the pupil and iris (correct)

Regulates light entering the eye

What does the sclera do?

Protects the eye and holds it together.

What regulates the amount of light that enters the eye?

Pupil.

What is the function of the lens?

Makes an image on the retina and refracts light. Signup and view all the answers

Which of the following functions does the aqueous humor serve?

Helps focus light to the lens Signup and view all the answers

What is the iris?

The colored part of the eye that regulates light. Signup and view all the answers

What does the ciliary body do?

Changes the shape of the lens by contracting and relaxing. Signup and view all the answers

What is the role of the vitreous humor?

Fills the eyeball and helps it maintain its shape. Signup and view all the answers

Where is the retina located and what does it do?

At the back of the eyeball; it captures images and turns them into electrical impulses. Signup and view all the answers

What is the fovea responsible for?

Allowing you to see in great detail. Signup and view all the answers

What are rods and what do they do?

Cells sensitive to light and dark, allowing you to see shape and movement. Signup and view all the answers

What is the function of cones?

Sensitive to color and function in bright light. Signup and view all the answers

What does the optic nerve connect?

Connects the retina to the brain. Signup and view all the answers

What is the blind spot?

The area where the optic nerve joins the retina with no rods or cones. Signup and view all the answers

Study Notes

Parts of the Eye

Cornea
- Transparent layer covering the pupil and iris.
- Protects internal structures and assists in focusing light.
Sclera
- Tough, white outer layer of the eye.
- Provides protection and maintains the eye's shape.
Pupil
- Circular muscle linked to the iris.
- Adjusts light entering the eye; enlarges in low light conditions.
Lens
- Clear, convex structure located behind the pupil.
- Refracts light and changes shape to focus images on the retina.
Aqueous Humor
- Clear fluid found between the cornea and lens.
- Helps focus light and maintains eye shape.
Iris
- Circular muscle that gives the eye its color.
- Works with the pupil to manage light intake.
Ciliary Body
- Ring of small muscles surrounding the lens.
- Alters lens shape for focusing on various distances.
Vitreous Humor
- Gel-like substance filling the eyeball.
- Helps maintain the eyeball's shape.
Retina
- Light-sensitive layer at the back of the eye composed of photoreceptors.
- Converts images into electrical impulses for the brain.
Fovea
- Area on the retina with a high concentration of photoreceptors.
- Enables sharp, detailed vision.
Photo-receptors: Rods
- Approximately 120 million in the eye.
- Sensitive to low light and detect shapes and movements.
Photo-receptors: Cones
- About 6 million in the eye.
- Detect color (red, green, blue) and function in bright light.
Optic Nerve
- Bundle of nerves connecting the retina to the brain.
- Transmits visual information for image processing.
Blind Spot
- Area where the optic nerve attaches to the retina; lacks photoreceptors.
- Responsible for a visual gap that the brain fills using other cues.

Description

Explore the parts of the eye with these flashcards. Each card presents a specific component like the cornea and sclera, detailing its structure and function. Ideal for students learning about human anatomy and physiology.