Parts of the Eye Flashcards

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.