the eye: structure

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The Eye: Structure

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The Eye: Structure . 1. Sclera . White part of the eye Is made of tough tissue Protects the inner workings of the eye and gives the eye its shape. 2. Aqueous Humor. A clear, watery fluid Circulates in the front part of the eye, maintaining a constant pressure inside the eye. . 3. Cornea . - PowerPoint PPT Presentation

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Page 1: The Eye: Structure

The Eye: Structure

Page 2: The Eye: Structure

1. Sclera White part

of the eye Is made of

tough tissue

Protects the inner workings of the eye and gives the eye its shape

Page 3: The Eye: Structure
Page 4: The Eye: Structure

2. Aqueous Humor

A clear, watery fluid

Circulates in the front part of the eye, maintaining a constant pressure inside the eye.

Page 5: The Eye: Structure

3. Cornea

The curved, clear, outer surface

Covers the iris and pupil

Page 6: The Eye: Structure

4. Pupil Is the opening in

the center of the iris

The size of the pupil: determines the

amount of light entering the eye

controlled by circular muscles

Page 7: The Eye: Structure

5. Iris

The colored part of the eye

Made of circular muscles

Controls the size of the pupil

Page 8: The Eye: Structure

6. Lens

A clear convex lens

Is responsible for focusing light to form an image on the retina

Can change shape to focus on nearby and distant objects

Page 9: The Eye: Structure

7. Vitreous Humor

A clear, jelly-like substance

Fills the eye behind the lens

Holds the structures of the eye in place

Maintains the shape of the eye

Page 10: The Eye: Structure

8. Optic Nerve

A thick bundle made of millions of neurons

Carries visual information from the retina to the brain.

Page 11: The Eye: Structure

9. Retina

A thin, translucent, light-sensitive tissue made of specialized cells called rods and cones

Receives images formed by the lens

Page 12: The Eye: Structure

10. Optic Disc

The point where the optic nerve enters the retina

NOT sensitive to light

Known as the “blind spot”

Page 13: The Eye: Structure

11. Tapetum

A shiny layer that lines the area behind the retina of many animals

Helps make animal eyes visible in the dark

Allows them to see better at night

Page 14: The Eye: Structure

Vision

Page 15: The Eye: Structure

Corrective Lenses (Glasses & Contacts)

Near Sighted

Far Sighted

Page 16: The Eye: Structure

Color Blindness

Your eyes have special cells called rods and cones

Rods – Light sensitive

Cones – Color Sensitive

Page 17: The Eye: Structure

Color Blindness

There are three main kinds of color vision defects. Red-green color vision defects are the most common. This type occurs in men more than in women. The other major types are blue-yellow color vision defects and a complete absence of color vision.

Page 18: The Eye: Structure

Color Blindness

Most of the time, color blindness is genetic. There is no treatment, but most people adjust and the condition doesn't limit their activities.

Page 19: The Eye: Structure

LASIK

1. Create a flap of corneal tissue

2. Remodel the cornea using the laser

3. Reposition the flap

Page 20: The Eye: Structure