Cornea – a transparent membrane that covers the eye Iris



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How Light Travels Through the Human Eye – Teacher Notes
Cornea – a transparent membrane that covers the eye
Iris – circular band that controls how much light enters the eye
Lens – A transparent tissue that bends light passing through the eye which bends light and helps you focus on an image
Pupil – The hole in the center of the eye which allows light to pass through
Retina – layer of tissue on the back of the eye that has cone and rod cells which gather information
Optic Nerve – Begins in the back of your eye and is the connection to your brain

Step 1: Light enters your eye through your cornea.
Step 2: The light continues through the pupil which is controlled by the iris
Step 3: The light passes through the lens which refract the light causing the picture to be upside down
Step 4: The upside down picture travels to the retina which flips the image right side up
Step 5: The optic nerve sends signals to your brain which interprets them as images.
Eye Vocabulary
Cornea –

Iris –

Lens –

Pupil –

Retina –

Optic Nerve –
How Light Travels Through the Human Eye
Step 1: _____________________________________________________________________
________________________________________________________________________Step_3'>______________________________________________________________________

Step 2: _____________________________________________________________________
______________________________________________________________________

Step 3: _____________________________________________________________________
______________________________________________________________________

Step 4: _____________________________________________________________________
______________________________________________________________________

Step 5: _____________________________________________________________________
______________________________________________________________________
Vocabulary Match – Up
Cut these apart and have students work on matching up the terms with the correct definitions. Then, record them on their class work sheet.



Cornea


layer of tissue on the back of the eye that has cone and rod cells which gather information




Iris



The hole in the center of the eye which allows light to pass through


Lens

Begins in the back of your eye and is the connection to your brain


Pupil



circular band that controls how much light enters the eye




Retina



a transparent membrane that covers the eye


Optic Nerve



A transparent tissue that bends light passing through the eye which bends light and helps you focus on an image


Steps of Vision
Cut these apart and work in groups to put the steps of light entering the eye in order.



The upside down picture travels to the retina which flips the image right side up


The optic nerve sends signals to your brain which interprets them as images


The light passes through the lens which refract the light causing the picture to be upside down


Light enters your eye through your cornea.



The light continues through the pupil which is controlled by the iris




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