Structure And Function Of The Eyeball
By Jayton Miller
Vision impairments affect around 12 million people over the age of 40 in the US alone. Knowing the basic structure and function of the eyeballs can help you take care of your eyes properly, and communicate what you need to with a medical professional if need be. Let’s take a tour of the eyeballs...
- General Function And Structure Of The Eyeballs
- Common Challenges Of The Eyeballs
- Ways To Keep The Eyeballs Healthy
General Function And Structure Of The Eyeballs:
The eyes main role is to respond to light in the environment that we are in. Sight, from a scientific perspective, is the response from the brain to the patterns of light that are being received through the eyeballs.
Our eyeballs allow us to receive information in the form of light patterns from our surroundings. These light patterns are then transmitted through the nervous system to the brain and are processed as images.
The eyeball is surrounded by a layer of fatty tissue in a bony chamber known as the orbit. The eyeballs themselves are divided into three main chambers:
- The anterior chamber - receives fluid from the pupil and passes it to the bloodstream through tiny channels.
- The posterior chamber - receives fluid from a layer of cells covering the ciliary body
- The vitreous body - The largest chamber, filled with a jelly like substance
The individual parts of the eyeballs include:
- Central Retinal Vessels - Main transporter of blood to and from the eyeballs
- Optic Nerve - Transports information to the brain via the nervous system
- Choroid - forms the ciliary body and and iris
- Fovea In Macula - Where visual acuity is is optimized
- Ciliary body / muscle - secretes fluid into the posterior chamber
- Iris - The colored part of the eye
- Lens - Focuses light to the retina
- Capsule of lens - membrane around the lens
- Cornea - See through layer that covers the eye
- Schlemms canal - a drainage point for liquid
- Zonular fibers - Ligaments that help suspend the lens of the eye
All of these areas are covered by three main layers:
- The Sclera - This is a tough fibrous layer that acts as protection for the eye. In the front of the eye it is visibly seen as the white part of the eyeballs. This area is usually covered by the conjunctiva which is a layer of connective tissue.
- The Uvea - The middle layer, the uvea contains many blood vessels, nerves, and the pigmented cells of the eyeballs. There are three regions within this layer known as the choroid, ciliary body, and the iris.
- The Retina - This inside layer of the eyeballs contains a layer of nerve tissue containing photoreceptors. These photoreceptors interpret the intensity of the light and color.
The ye is an extremely complex organ, not just in humans but in most animals that have the ability to see through eyeballs. Knowing the basic structure and function of the eyeball will help you take the steps necessary to keep your eyes healthy, and help you communicate any possible issues with your eye doctor.
Common Challenges Of The Eyeballs:
Some of the most common challenges that are seen with the eyeballs are:
- Cataracts - A milky white lens that develops with age or trauma in most cases.
- Glaucoma - Causes damage to the optic nerves
- Dry Eyes - When the tear glands cant make enough tears
- Floaters - Tiny specks that float across the field of vision
- Macular Degeneration - The most common cause of blindness, characterized by damage to the macula.
Ways To Keep The Eyeballs Healthy:
Some of the best ways to keep the eyes healthy are:
- Eat a good diet
- Exercise Regularly
- Wear eye protection
- Don’t Smoke
- Don’t Over Expose Your Eyes To Powerful Light
Vision impairments affect around 12 million people over the age of 40 in the US alone. Knowing the basic structure and function of the eyeballs can help you take care of your eyes properly, and communicate what you need to with a medical professional if need be. If you’d like an outline for how you can eat to support healthy function of your whole body make sure to check out the Thermo Diet, only inside of UMZUfit.