Human Body

Question: After looking at the eye, how it's made and how it functions, would you say that it could evolve? This one organ is not as complicated as our brain but it is still better at what it does and how it's made than anything science can try to make that would even come close to the complexity of the human eye. All it would take is for one thing not to evolve (if evolution is the answer) and the eye would have been useless.

When in the evolution process did we get sight? Science says that the eye formed from a freckle. We have freckles all over our body. Why was the eye placed in the same place on everybody(the head) if freckles appear anywhere on the human body? Lets look at some facts about the eye that make it look impossible to evolve.

1) Let's keep things in focus: Because the eye is a certain size, the lens is made to work with this size, and the Len's focus is variable and controllable by the vision part of our brain which allows us to see near and far and in focus. If just one of these things are off just by a little, to compensate, we have to wear some type of corrective lens (glasses or contact lens) or get corrective eye surgery (like lasix surgery).

3) Like a movie screen in the back of our eyes:The retina is like no other part of the body. It is only found in the eye and specially made to receive the image from the lens and send it to the vision part of the brain to be processed. Being that the brain has a special section just to process this information should tell you how unique this organ is.

4) Ever try to see through fog? Then we have vitreous. Which is a clear fluid that the eye is full of and the image or light passes through to project onto the back of the eye. What if the fluid were not clear? It would be like looking through fog or not being able to see at all. This is what happens to to diabetic person when they start to lose their site. The very small blood vessels in the back of the eye rupture and bleed just a little. But this is enough  blood (unclear fluid) to mess up vision. There is surgery to fix this but it's usually temporary because more vessels will rupture.

5) Then we have the six muscles that control the movement of the eye. These muscles are placed in specific places so that we would have complete control over this. We can follow objects and are able to drive a car because of this. If we did not have these six muscles that are exactly in perfect places, then we could not see everything we see now.

6) Then we have what called real time processing of what we see. If we did not have this there would be a great limitations in what we could do. Example: A baseball player could not hit a 90 mph ball being thrown towards him. Even just a one second delay in what we see would prevent the baseball player from hitting the ball. Just a one second delay would allow the ball to be in the catchers glove before the batter could swing, because one second would make the ball look like it just left the pitcher's hand but actually it's in the catcher's glove. Anything else that requires split second thinking would be effected also. Example: Anything you do in a car that would require such quick thinking you could not do. Think of all the accidents because people could not react fast enough to what they see.

Note: Our reaction to what we see is already slowed up by how fast the commands from the brain get to our muscles. It takes a half a second(.5 seconds) for a male human to react. Females are slightly faster(.4 to .3 seconds).

 For those who understand computers and how they work. For the fastest super computer cannot process what our eye sees in real time. Remember when we all had to upgrade from the 200 mhz speed pc's because they would not keep up? This is what the worlds fastest computers would look like trying to process what the eye sees. They could only process maybe one frame per second! Because the eye sees in not only real time 2d but also real time 3d along with every color. In computer speed, our eye's send enough information to the brain that the brain has to process it all in real time between 30-60 frames per second!

Sight is one of the most important sensory perceptions, enabling human beings to orientate themselves within their surroundings.

The eyes (oculi) enable shapes and colors, light and dark to be distinguished by means of light impulses. Vision is a result of these light impulses being processed in the brain (cerebrum). This highly developed form of sensory perception is primarily achieved when supported by the

memory. Vision is facilitated by a physical process: a refraction of light when it penetrates materials of varying optic density.

If the ray of light falls on a transparent material, it alters its direction.

A particular shape can cause the ray of light to bundle or scatter. This fact is exploited in a camera, for example, and vision is often explained by comparing it to the way a camera works: the lens in the eye corresponds to the lens in the camera, the pupil corresponds to the aperture, and the retina to the film. In a camera, a small, reverse image appears via the lens on the film. In the eye, this image appears on the retina.

In the visual organ (organum visus), the sensory cells are equipped with auxiliaries and constitute a complicated visual apparatus: in the eyeball (bulbus oculi), optic stimuli are converted to neural activity. A n ingenious system of nervous fibers then transports these stimuli to the brain. With the help of the ocular muscles (musculi bulbi), the eyeball (bulbus oculi) can be moved. Two-eyed vision (binocular vision) in one image becomes possible and the field of vision can be extended. The eyeball is protected by the eyelids, eyelashes, lacrimal glands and eyebrows.

The light-refracting part of the eye is composed of the cornea, aqueous humor, the lens and the vitreous body.

The rays of light hitting the eye from the outside are united to form one image through the light-refracting part of the eye.

In order for this to happen, the rays of light are converted to nervous stimuli, which then travel to the optic center in the brain (cerebrum) and enter conscious thought as an image.

In order to see an image clearly, we involuntarily direct our eyes towards the object in question so that its image is projected onto the fovea centralis or "yellow spot", the point of clearest vision. The further from the "yellow spot" objects are displayed, the more unclear they become. At the point where the optic nerve (nervus opticus) leaves the eye, we cannot see anything at all, and this point is therefore known as the "blind spot".

In order to adapt to different distances of vision, the lens can bend to varying degrees. This process of distance adjustment is called accommodation and is carried out with the help of the ciliary muscle. When the eye has to be adjusted for seeing far distances, the ligaments around the lens pull it from all sides and flatten it.

To see near distances, a sphincter muscle containing ciliary bodies contracts, thereby relaxing the suspensory apparatus of the lens. Due to its elasticity, the lens then bends even further, until the object is clearly displayed on the retina. This tension of the ciliary muscle causes the eye to tire more rapidly when required to look at near distances than far ones.

In addition to accommodation, focusing is supported by the ability of the pupil to narrow as the lens becomes more bent.

It should be noted that these processes usually take place in both eyes (binocular). In order to avoid "seeing double" (diplopia), the brain (cerebrum) is capable of fusing the two images.

7 questions evolutionists can't answer:

1) In the evolution of the eye. Which evolved first. A) The eye itself, or B) The vision center of the brain?

2) In the evolution of the eye, how long did it take before it became a funtional organ (in other words, how long was the eye useless, which made us blind)?

3) Which evolved first? The eye, or the muscles that hold it in place, and control it?

4) When we finally where able to use this organ, where we able to see in almost real time as we do now? Or did the vision center of our brain have to evolve more to process the information the eye was sending to it?

5) Did we see in color, or black and white?

6) In what sequence did the parts of the eye evolve (link)? There are over 40 parts that all have to work together for the eye to function properly.

7) Some parts of the eye are not found in any other part of the human body. How did natural selection devise all this to come together for this organ to work?