Convex lenses bend light toward a focal point and are used by farsighted patients in eyeglasses. Concave lenses spread out light and are used by nearsighted patients. Camera lenses and telescope lenses evolved from optical lenses developed for eyeglasses and help focus images. The Fresnel lens, invented in the 1800s, helped project light across seas for lighthouses. Convex and concave lenses have been instrumental in scientific discoveries since their invention in the 1300s and were a key part of Galileo's telescope inventions in the 1600s that helped launch the scientific revolution.

1. Lenses: Convex and concave Nathan Meyers TED 111

2. Concave Lenses Lens that process at least one surface that curves inwards. A diverging lens that spreads out light waves refracted through it.

3. Convex Lenses Convex lens bends light toward a central or focal point.

4. EYEGLASSES Lenses help patients to be able to see better through the use of glasses. Near sighted patients use Concave lenses Far sighted patients use Convex lenses

5. History from Glasses into Photography The camera lens evolved from optical lenses developed for other purposes, and matured with the camera and photographic film. In 1568, a Venetian nobleman, Daniel Barbaro, placed a lens over the hole in a camera box and studied sharpness of image and focus. His first lens was from an old man's convex spectacles. The astronomer Johann Kepler elaborated on Barbaro's experiments in 1611 by describing single and compound lenses, explaining image reversal, and enlarging images by grouping convex and concave lenses. (enotes.com)

6. Photographic Lens

7. Camera Lens The camera lens is an invention that tries to duplicate the operation of the human eye. The purpose of the lens in the camera is to adjust, focus, and transfer the image in color as the picture would appear to the human eye to the camera.

8. OTHER TYPES OF LENSES!

9. LIGHTHOUSES The Fresnel lens is a lens that is used in lighthouses to aid in the projection of light across seas.

10. Fresnel Lens A French physicist named Augustine Jean Fresnel created a lens that would help to travel across the oceans to lead boats to shore. Fresnel’s invention was simply a convex lens that had ridges in it to extend the light and reflect it even further.

11. The Fresnel lens shot the light across the horizon up to 20 miles which was 97% more powerful than the traditional oil light of the time. The invention of the Fresnel lens saved a lot of power and money and at the same time produced a more powerful signal than before.

12. Telescopes Telescopes would not be possible without the use of lenses.

13. History The telescope was said to be invented by Galilieo around the 17th century. It was used to view the heavens and learn more about the stars than they knew. The telescope was said to be the invention of the scientific revolution in the 17th century. The simple idea of convex and concave lenses (which were invented in the 1300’s) placed in a tube to allow far away objects in a tube was an idea that revolutionized the world that we know today.

14. Galileo Galileo Galilei was born on February 15, 1564 in Pisa, Italy. Galileo pioneered "experimental scientific method" and was the first to use a refracting telescope to make important astronomical discoveries

15. Lens Through the use of the convex and the concave lenses we are able to have the world that we have today. Without this invention the world would be a dark unknown place. Many great inventions and ideas have sparked from these simple bent pieces of glass. The lens will always have inspirations on the world and its future development and never will go out of style. In my own personal opinion, the lens was one of the greatest inventions in the world because of how beneficial it has been to society and the growth of nations.

16. Works Cited http://www.nndb.com/people/925/000100625/ http://www.enotes.com/how-products-encyclopedia/camera-lens http://images.google.com/imgres?imgurl=http://www.scienceclarified.com/images/uesc_06_img0342.jpg&imgrefurl=http://www.scienceclarified.com/Io-Ma/Lens.html%3FComments%255Bdo%255D%3Dmod%26Comments%255Bid%255D%3D1&usg=__eQUckdfypSdJdY9Am5fgHoWIwx4=&h=228&w=232&sz=6&hl=en&start=10&um=1&itbs=1&tbnid=EiaLog30ABeVZM:&tbnh=107&tbnw=109&prev=/images%3Fq%3Dconcave%2Blense%26um%3D1%26hl%3Den%26sa%3DN%26rls%3Dcom.microsoft:*:IE-SearchBox%26tbs%3Disch:1

17. Cont… http://www.answers.com/topic/lens-1 http://galileo.rice.edu/sci/instruments/telescope.html http://www.lucidcafe.com/library/96feb/galileo.html http://images.google.com/