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Comparing Ways of Seeing: Human Vision

Comparing Ways of Seeing: Human Vision

Introduction

Imagine if you were to design a body part such as the human eye. How would you design the parts of the eye to work properly? What would each part of the eye need to do to provide good vision? Use the resources on the Comparing and Measuring Moving Objects student esheet to answer the questions on this sheet. Be prepared to present your answers to the class.


Review the information from Human Vision and Color Perception and How Vision Works.
1. Describe the functions of these optical elements:

eye Cornea

Iris

Pupil (also called the Aqueous Humor)

Lens

Retina

2. How is focus controlled by the eye?

 

 

3. What is refraction?

 

 

Review the information from Eye Anatomy and Cross Section Through a Human Eye.
1. Match the eye parts to camera parts that perform similar functions.

retina diaphragm
iris film
pupil lens


2. What is myopia?

 

 

3. Describe the cause and effects that occur when light passes through the eye.
a. The ____________ acts like the ____________ of the camera, dilating and constricting the pupil to allow more or less ____________ into the eye.

b. The ____________ is responsible for ____________ light into the retina. It changes shape slightly to allow us to change ____________ between objects that are near and those that are ____________.

c. The ____________acts like ____________ in a camera. The retina responds to ____________ hitting it and converts them to electrical signals carried by the ____________ to the brain.

d. The optic nerve is the structure which takes the information from the retina to the ____________, where this information is interpreted as a visual image. The optic nerve consists of a bundle of about one million ____________.



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