Thank you for joining me once again this evening. I am Dr. Harrison Campbell owner and chiropractor of Restoration Health a premier sugar land chiropractors office. In tonightís podcast we will be discussing the the eyes.
As everyone knows our eyes allow us to see objects, colors, distances, and dangers in our daily lives. How they do this however may not be know and this is what we will be discussing this evening.
First and foremost we will cover the vision center of the brain. As many sugar land chiropractors will tell you the brains vision centers is in the back portion of the brain. This center is what decrypts the information our eyes see into what we can perceive and understand.
How this information gets to the brain and those vision centers is through the second cranial nerve. This nerve is known as the optic nerve and it transmits the signals from the eyes to the brain in an electrical format as all nerves transmit information. The brain takes this electrical input and transfers it into a form which we perceive as sight. Something else the optic nerve does is it takes part of the image it sees and the two optic nerves connect and swap information. What this means is that part of the image your left eye sees is then transmitted to the right side of the brain. Having two eyes and the optic nerves swapping information is what helps provide depth proception.
Depth proception is the ability to determine how far or how close an object is. This is especially important in our lives when playing sports, driving, or even in something as simple as reaching to pick up our glass to take a drink.
The optic nerve also flips the image right side up since the eyes perceive as our eyes perceive the image upside down. We will touch more on the flipping of the perceived image a little later in the podcast, but rest assured the image you see is in fact flipped right side up and as we ìseeî it upside down to begin with.
Now as for the eye itself all sugar land chiropractors will tell you it is a complex structure and the job it performs is amazing.
We will break the eye into three main parts, the lens the retina, and the eyeball itself. Let us start with the lens. The function of the lens is to refract the light into a focal point on the retina. The lens as sugar land chiropractors know is not hard. It is a flexible material which is what allows us to perceive objects and various distances with clarity. The lens is controlled by ocular muscles and it is these muscles which people are referring to when they say their eyes are tired. When the light reflected off an object encounters the lens it is refracted to the retina. In the process of being refracted the object is inverted or flipped upside down as it encounters the retina. It is due to this refracting process that the optic nerve has to invert the image while transmitting it to the brain.
As we age the lens hardens and this is why peopleís eye sight gradually worsens with age even if they had perfect eye sight while younger. There is a surgical procedure to replace the natural lens with an artificial lens in order to correct peopleís vision problems.
The retina is on the back of the eyeball and it what the light that the lens refracted hits.
Now the retina has structure on it called rods and cones. Each of these structures performs a unique function for the eye. As sugar land chiropractors will tell you the rod perceives low light situations. What this means for you is the ability to see at night or low light situations. Without these rods to detect low levels of light, we would be unable to see or perceive objects at night. As for the cones this is what provides us with color vision. They interpret the colors we see and allow us to perceive the word as something other than black and white. It should be noted that object reflect certain waves of light and this is what gives them the color we perceive them as. For an examples the Logo of Restoration Health a premier sugar land chiropractors office is blue and green. The blue in the logo is blue because the blue wave of light is reflected off the object and our retinas and cones detect the blue wavelength and our brains interpret the signal as blue.
As for the eyeball itself while it may seem unimportant, it does play a big part in our vision. The eye is filled with a liquid called aqueous humor and transmits the light wavelength to the retina. The length of the eyeball plays a part in determining how sharp or clear our vision is.
As a sugar land chiropractors office can confirm some who has an eyeball to short or to long with impact where the lens refracts the light. This eyeball being an improper length with determine if the object jest you are looking at is in focus or not. This can determine if you are near or farsighted due to the refracting of the light by your lens.
Some portions of the eye that we have not covered up to this point are the muscles which control the movement of the eye, the tear ducts which lubricate the eye and prevent it from drying out, and the eye lid which protects the eye. Cranial nerves are the nerves which control the muscles which move the eye. Having a weak muscle or a nerve problem is what prevent normalized movement of the eye or what is termed a ìlazyî eye. As for the tear ducts and the eye lid we will have to cover that in a different podcast as we are out of time tonight.
Thank you for joining me once again for these nightly podcasts. I do hope you found this discussion of the eyes to be educational. And as always please call Restoration Health if you find yourself or someone you know required sugar land chiropractors for an injury or pain relief. Thank you once again good night.