1. Vision Part 2 Module 3: Designing for Communication LESSON Ext 3

2. Module 3: Designing for Communication LESSON Ext 3 Lesson Overview How does the human body process communication? In this lesson, you will learn:  What happens to light as it enters the eyes  What problems can arise with color vision

3. Module 3: Designing for Communication LESSON Ext 3 Guiding Questions  What makes a certain wavelength bounce off an object?  What makes grass green?  What makes blood red?

4. Module 3: Designing for Communication LESSON Ext 3 Pigment  Pigment is the material that changes the light through selective absorption to give an object its color.  Photopigments in the eye help the cones to process the light.

5. Module 3: Designing for Communication LESSON Ext 3 Focus  Light traveling through the eye is  Bent  Refracted  Focused  Define Refraction

6. Module 3: Designing for Communication LESSON Ext 3 Refraction  Water glass demo

7. Module 3: Designing for Communication LESSON Ext 3 Focused?  Fluid in the eye is like the water in the glass  Bending, refracting, and focusing flip the image upside down  Optic nerve creates electrical impulses that are transmitted to the brain

8. Module 3: Designing for Communication LESSON Ext 3 Optional Activity  Activity with concave and convex lenses Magnifying glass activity Simulated Optics Experiment

9. Module 3: Designing for Communication LESSON Ext 3 Vision Problems  Short-sightedness (myopia)  Long-sightedness (hypermetropia)  Astigmatism  Presbyopia  Color sensitivity

10. Module 3: Designing for Communication LESSON Ext 3 Color Deficiency  Also known as color-blindness  Unable to detect a certain color or a set of colors  Inherited  Caused by a gene with the wrong code  Light is shifted causing another color to be seen  More common in males

11. Module 3: Designing for Communication LESSON Ext 3 Classifications of Color-blindness  Trichromacy  Dichromacy  Protanopia  Deutanopia  Tritanopia  Monochromacy

12. Module 3: Designing for Communication LESSON Ext 3 What is it like to be color-blind?  Take a color-blindness test:  http://colorvisiontesting.com/ishihara.htm http://colorvisiontesting.com/ishihara.htm  http://colorvisiontesting.com/online%20test.htm http://colorvisiontesting.com/online%20test.htm  What color deficient people see:  http://colorvisiontesting.com/what%20colorblind%20people%20 see.htm http://colorvisiontesting.com/what%20colorblind%20people%20 see.htm  Web design and color deficiency:  http://www.iamcal.com/toys/colors http://www.iamcal.com/toys/colors

13. Module 3: Designing for Communication LESSON Ext 3 Assignment  Use this Web site to choose colors that you think would be best suited for the background of a Web site and a text color.  Write a short justification of your choices.  Web design and color deficiency:  http://www.iamcal.com/toys/colors http://www.iamcal.com/toys/colors

14. Module 3: Designing for Communication LESSON Ext 3 Lesson Review  How does the human body process communication?  What happens to light as it enters the eyes?  What problems can arise with color vision?