Tuesday, September 25, 2007
Thomas Tooma Anatomy of the Eye
We utilize our eyes in virtually everything we make and depend on our vision perhaps more than than any other sense we have. Sight is the most cherished of the five senses, and many people fear sightlessness more than any other disability.
The oculus lets us to see and construe the shapes, colors, and dimensions of physical objects in the human race by processing the visible light they reflect or give off. The oculus is able to see in dim visible visible light or bright light, but it cannot see physical objects when light is absent. The oculus alterations visible light beams into electrical signalings then directs them to the brain, which construes these electrical signalings as ocular images.
The oculus is put in a protective cone-shaped pit in the skull called the celestial orbit or socket and measurements approximately one inch in diameter. The celestial orbit is surrounded by layers of soft, fatty tissue which protect the oculus and enable it to turn easily. Six musculuses modulate the movement of the eye. Among the more than of import parts of the human oculus are the iris, cornea, lens, retina, conjunctiva, macula, and the oculus nerve.
Cornea
The cornea is sometimes referred to as the "window of the eye." It supplies most of the focusing powerfulness when light comes in your eye. The cornea is composed of 5 layers of tissue. The outer layer (the epithelium) is the eye's protective layer. This layer is made up of highly regenerative cells that have got the ability to turn back within 3 days, and therefore, let for fast healing of superficial injuries. Most of the interior layers supply strength to the eye. The optical maser vision rectification process is performed on this portion of the eye.
Lens
The lens system is the clear construction located behind the pupil. Its primary mathematical function is to supply fine-tuning for focusing and reading. The lens system executes this mathematical function by altering its form to go thinner or thicker as necessary. Between the ages of 40 and 50, the lens system goes less flexible and presbyopia sets in. As people attain their 60's or 70's, the lens system sometimes goes cloudy and difficult (cataract formation), preventing visible light from entering the eye.
Pupil
The student is the 'black circle' that you see in people's eyes. The primary mathematical function of the student is to command the amount of visible light entering the eye. When you are in a bright environment, the student goes littler to let less visible light through. When it is dark, the student spreads out to let more than visible light to attain the dorsum of the eye.
Iris
This is the colored portion you see in people's eyes (i.e. blue/green/brown/hazel). The primary mathematical function of the flag is to command the size of the pupil. This is achieved through muscular contraction or enlargement of the musculuses of the iris.
Vitreous Body
This is the clear 'gel like' matter located inside the eye's cavity. Its intent is to supply a spherical form to the eye. The vitreous may develop little bunches known as 'floaters,' which are more than common in nearsighted people than in the remainder of the population.
Optic Nerve
The eye nervus transports mental images from the retina to the brain.
Retina
The retina dwells of mulct nervus tissue which lines the interior wall of the eyes and Acts like the movie in a camera. Its primary mathematical function is to convey mental images to the brain. When your vision is perfect, the visible light beams coming into your oculus focusing precisely on this portion of the eye.
Sclera
This is the 'white part' that we see in people's eyes. The sclera's intent is to supply structure, strength and protection to the eye.
Labels: eye, Laser Eye Surgery, Lasik, thomas tooma
