VISION.

Slides:

Advertisements

Similar presentations

Light Notes 3 THE EYE.

Advertisements

The Senses Chapter 19 Section 3.

The Eye and Sight Contrast ways in which light rays are bend by concave and convex lenses. Describe how a prism forms a visible spectrum Explain why different.

Topic 4: Lenses and Vision

Notes - The Eye Chapter 11, Lessons 3 & 4. Lenses A lens is a transparent object with at least one curved side that causes light waves to bend.

 Get out notes and practice from yesterday  Pick up ruler and finish practice from yesterday.

How Do Your Eyes Help You See?

18.4 Seeing Light Pg

7.5.g Students know how to relate the structures of the eye and ear to their functions. 7.6.b Students know that for an object to be seen, light emitted.

Light Waves Sec 1.

The Cornea Light enters the eye through the cornea

Lenses. Applications of Light Refraction What are some common applications of the refraction of light? Cameras Microscopes Lenses Eyeglasses Human eye.

The Eye and Sight Describe the relationship between the structure of the eye and sight Contrast ways in which light rays are bent by concave and convex.

The Human Eye. A convex lens is the type of lens found in your eye. The lens takes light rays spreading out from objects and focuses the light, through.

The Senses & Vision p What are the five senses? 1.Vision 2.Hearing 3.Smell 4.Taste 5.Touch.

 The lens of the eye is a transparent object behind the iris that changes shape to help adjust the eye's focus to see near or distant objects.

Chapter 2 Section 4 Seeing Light.

Human Vision Outcome C4 – Explain how human vision works.

Seeing light When light from an object enters your eye, the eye sends a signal to your brain and you see the object. When light from an object enters your.

Label the Eye – use book pg. 618 Structure & Function: use book pgs Cornea: clear tissue that covers front of eye. Pupil: opening through.

Seeing Light Chapter 2 Section 4. Vocabulary Cornea – the clear tissue that covers the front of the eye Cornea – the clear tissue that covers the front.

Color  You see an object as the wavelength  ( color) of visible light that it reflects  Sunflowers are yellow because it reflects (bounces off) mostly.

The Eye. The Pupil  A small adjustable opening.  Its size and the amount of light entering the eye is regulated by the iris.

6.1 Human Vision.  Light enters the eye through the pupil  The iris (the coloured part of the eye) controls the amount of light entering the eye  In.

Topic 4: Lenses & Vision. A lens is a curved piece of transparent material (glass/plastic). When light rays pass through it, the light is refracted, causing.

How can we use lenses to correct vision?

Describe the relationship between the structure of the eye and sight

The iris is the coloured circle of muscle surrounding the pupil.

The Visual System: The Structure of the Visual System

Unit 3 Lesson 4 Light Waves and Sight

Chapter 6.2 The senses THE EYE.

VISION How do we see?.

The eye S8P4 b, c.

The Structure of the Visual System

Light and Sight.

The Human Eye: Seeing Light

EYE Kim Lachler Updated 2015 NCES: 6.P.1.2.

The Eye and Sight Contrast ways in which light rays are bend by concave and convex lenses. Describe how a prism forms a visible spectrum Explain why different.

The iris is the coloured circle of muscle surrounding the pupil.

The iris is the coloured circle of muscle surrounding the pupil.

7.5.g Students know how to relate the structures of the eye and ear to their functions.

The Eye and Sight Contrast ways in which light rays are bend by concave and convex lenses. Describe how a prism forms a visible spectrum Explain why different.

Notes: Structure of Eye

The Eye and Sight Describe the relationship between the structure of the eye and sight Contrast ways in which light rays are bent by concave and convex.

Refraction of Light When light rays enter a medium at an angle, the change in speed causes the rays to bend, or change direction Some mediums cause light.

UNIT 3 ~ PHYSICS Lesson P6 Part 1 ~ Human Vision

The Eye Seeing is Believing.

Goal 8- The Eye Understand how we see . Goal 8- The Eye Understand how we see

UNIT 3 ~ PHYSICS Lesson P6 Part 1 ~ Human Vision

Week 9: Seeing Light CHAPTER 4, SECTION 4 Page 125 – 128.

End of Lesson 3.

Human Eye Structure of Human Eye: Focusing Eye defects

Title: The Human Eye LO: 1. Identify the parts of the human eye and state their functions. 3/4/2019 STARTER: What do these have in common?

The Eye Part 1: Structure and Function.

The Human Eye 6th Grade Science.

Unit 3 Lesson 4 Light Waves and Sight

The Eye and Vision.

Mirrors, Lenses, and the Eye

Entering The Eye Here We Go. . ..

Check & Reflect Answers p. 208

Presentation transcript:

VISION

VISION Your eyes are the sense organ that enables you to see the objects in your environment. Your eyes respond to the stimulus of light. They convert that stimulus into impulses that your brain interprets, enabling you to see.

PARTS OF THE EYE

PARTS OF THE EYE LENS – Behind the pupil, focuses and bends the light RETINA – Layer of receptor cells (rods and cones) that line the back of the eye. OPTIC NERVE – Sends nerve impulse from retina to the cerebrum CORNEA- Clear tissue that covers the front of the eye. PUPIL – Opening through which light enters the eye. IRIS – Circular structure that surrounds the pupil, regulates the amount of light that enters the eye.

HOW LIGHT ENTERS THE EYE 1. Rays of light pass through the CORNEA. 2. Rays of light pass through the PUPIL. 3. The IRIS adjusts how much light is let through the PUPIL. In bright light the Iris becomes smaller In dim light the Iris becomes larger

HOW LIGHT IS FOCUSED 4. The light that passes through the PUPIL strikes the LENS. 5. The LENS focuses and bends the light rays into an upside down image onto the RETINA.

HOW TO SEE AN IMAGE 6. The light from the LENS strikes the RETINA. 7. Receptors (rods and cones) on the retina respond to the light. RODS  Work best in dim light, help see black, white, and gray CONES  Work best in bright light, help you see colors

HOW TO SEE AN IMAGE 8. When light strikes the rods and cones, nerve impulses begin. 9. Nerves impulses travel to the cerebrum through OPTIC NERVES. 10. The cerebrum combines images from both the right and left eye and flip the image right-side up.

VISION PROBLEMS The LENS is a curved, transparent object that bends light rays as they pass through it. If the lens does not focus light properly on the retina, vision problems result. The lenses in eyeglasses can help correct the vision problems.

NEARSIGHTEDNESS See nearby objects clearly. Cannot see objects far away. Caused by an eyeball that is too long. Because of the extra length the light must travel further to reach the retina, making distance objects not focus clearly. Image comes into focus in front of the retina

CORRECTING NEARSIGHTEDNESS To correct nearsightedness a person wears eyeglasses with concave lenses. Spreads the light rays out making them focus on the retina, not before it.

FARSIGHTEDNESS See distant objects clearly. Cannot see objects nearby. Caused by an eyeball that is too short. Because the eye is so short, the light wants to travel to far past the retina. When the light hits the retina the image looks blurry.

CORRECTING FARSIGHTEDNESS To correct farsightedness a person wears eyeglasses with convex lenses. The lens makes the light rays bend toward each other quicker helping them focus on the retina.

OPTICAL ILLUSIONS