5 in 5 Name three parts of the eye What part controls the amount of light that enters the eye? What is the name of the nerve that brings the information captured by the retina to the brain? Give an example of light reflection Give an example fo light refraction

Today: Review of the eye More details regarding refraction and reflection Lenses In groups or individually, make a song about the parts of the eye and how we can see HOMEWORK: – Using p answer p numbers 15 to 21

Anatomy Review

To Recap… Iris: Cornea Lens Retina Optic Nerve Controls the amount of light entering the eye Protects the eye Adjusts to allow us to see from far and close Changes the light into a nervous impulse Sensory nerves that brings the impulse to the brain

Light Part of the electromagnetic spectrum We can only see the visible portion of the spectrum. The higher the frequency, the more energy the electromagnetic wave has.

Infrared Radiowaves Visible Light X-rays Gamma Rays Microwaves Ultra violet Red Indigo Green Orange Blue Violet Yellow

Reflected or refracted? Reflection

Reflected or refracted? Reflection

Reflected or refracted? Refraction

But what does this have to do with sight? Light is refracted constantly in our eye to hit the retina perfectly

Divergent Not the movie, the lens

Myopia

The concave lens/Divergent lens

Convergent

Hyperopia

The convex lens/Convergent

To recap 8. Names the parts of the eye involved in vision (iris, cornea, crystalline lens, retina) 9. Describes the function of the main parts of the eye 7. Locates different areas on the electromagnetic spectrum (e.g. radio waves, visible light, X-rays) 8. Describes different applications of electromagnetic waves in the health care sector (e.g. X-rays, infrared optical imaging) 9. Describes how light rays are deviated by a plane reflective surface 10. Determines the angle of reflection of a light ray on the surface of a plane mirror 11. Describes how light rays are deviated when they pass through the surface of a translucent substance 12. Determines the focal point of concave and convex lenses 13. Describes the relationship between the focal point of a lens and the degree of deviation of light rays in different situations (e.g. accommodation of the crystalline lens, choice of corrective lenses)