Rod+Cells+-+KS

= Introduction = toc You are in the beginning of the Wizard of Oz. All you can see is black and white. Then the cones come in. That is when Dorothy lands in Munchkin Land. Rods and cones make the whole movie come to life. The rods see in black and white and details and the cones see in color. The Wizard of Oz is similar to what your eyes see black and white and color mixed to one to create a beautiful sight. The wicked witch is like the diseases that you can develop in your rods that are trying to take away from the beautiful sights that you can see. The eye can see many beautiful places but when you have diseases in your eye, it becomes harder to see.

= How do Rods Cells Work? =

The rod cells help us see. Without the rod cells, we would only be able to see colorful blurs. **Rod cells** are photoreceptor cells in the retina of the eye that can function in less intense light than the other type of visual photoreceptors. Rods see everything upside down, however the brain flips it. The rods are the reason we can see at night. When the light rays hit the eye it is transformed to electrical energy. The rod cells and the eye are an amazing structure that works just like a camera. The retina is lined with a black pigment melanin just like the inside of a camera. This helps create less reflection. The rod cells also produces a chemical called rhodopsin. Rhodopsin is sensitive to light so it helps see in low light and absorbs the light.

= What Parts of an Eye Help Us See? =

The eye has many different parts and structures that help us see. The parts of the eye are: rods, cones, sclera, choroid, lens, retina, lamictal gland, rods, and cones.



The image above is a diagram of the human eye. The rods and cones are behind the eye near the optic nerve. The cones are cone-shaped and the rods are long and thin.

The retina is the light-sensing structure of the eye. It is here where it first sees and senses the light.

= How do Rods and Cones Work Together? =

Cones detect color, but only in bright light. On the other hand rods only detect black and white, but only in low light. Below is a Venn diagram comparing rods and cones. Rods have a higher concentration of cones in the fovea but cones are spread.

This is a Venn diagram comparing rods and cones. This is a diagram of what rods and cones look like.

**What Diseases Can You Get in Your Rods?**

In the article "They Eye Science Aid" it states " **glaucoma** is a vision disorder caused by the buildup of improper draining of fluids. It causes pressure where rods and cones are located. A person with glaucoma said, “glaucoma is a thief of sight. Each day it steals from your precious memories. Not of what was, but what’s to come”. - Jeremiah Lin. Glaucoma eventually causes total loss of vision.

= Conclusion =

Rods help you see beautiful places and other beautiful sources. Without rods, it would take away from our sight. Rods and cones are a team that work together to make everything seen in a beautiful manner. Furthermore, without rods we would be unable to see in the dark because rod cells have the ability to see in low light.

=References=

Works Cited Basher Science. Human Biology. N.p.: n.p., n.d. Print. Bianco, Carl. “How Vision Works.” Health. HowStuffWorks, 2016. Web. 9 Mar. 2016. . “Eyes Rods and Cones.” Inner body. Innerbody, 1999. Web. 3 Mar. 2016. . Science Aid, ed. “The Eye.” Science aid. Science Aid, 9 Mar. 2012. Web. 9 Mar. 2016. . Vision Discovery Education, 2004. Video Segment Discovery Education. Web. 17/2/2016. .