Essays Tagged: "Cornea"

Near & Farsightedness, What are visual defects and how common are they?

ctsyou must first know how the eye works.        First light passes through the cornea, which is thetransparent part of the sclera, or white of the eye, which iscomposed of t ...watery fluid called the aqueous humor. This fluid fills acresent-shaped space which with the cornea helps bendthe light toward the center of the eye.        Under the aqueou ...

(1 pages) 30 0 3.7 Mar/1997

Subjects: Humanities Essays > Health & Medicine

"Second Sight" by Sinclair Smith.

r stories.Grayson was staying with her sister Kara because the hospital in which Grayson needed her cornea transplants was closer than where Grayson was living before. After the second operation Grays ... imes.Grayson is a girl aged 19. She has been blind all her life and out of the blue was offered two cornea transplants for her eyes. She was staying at her sister Kara's flat. Grayson was invited to a ...

(2 pages) 25 0 3.0 Nov/2002

Subjects: Literature Research Papers

The Structures and Functions of the eye.

t and how the eye is specialised in producing a clear image for the brain to interpret.Conjunctiva, Cornea, Pupil (Iris), Retina, Blind Spot, Fovea (Yellow Spot)The very first thing light will come in ... the eye is closed which will stop an image being produced at all or the conjunctiva which coats the cornea. The conjunctiva is a thin layer of transparent cells placed to protect the vulnerable soft c ...

(2 pages) 44 0 4.0 Apr/2003

Subjects: Science Essays > Biology > Human Biology

Macular degeneration.

have to understand the physiology of the eye. The eye consists of two lenses. The frontal lens, the cornea, is the most powerful. The weaker lens is known as the crystalline lens. The iris and pupil a ...

(2 pages) 47 1 3.0 Apr/2003

Subjects: Science Essays > Biology

The eye

e the images in his or her environment.Light enters the eye through a transparent shield called the cornea. It is attached to the outer wall of the eye. The cornea focuses light rays so that they go i ... able so that it can help protect the eye from any particles that may get in.After going through the cornea, light rays have to pass through the pupil. It is an adjustable opening that is controlled by ...

(2 pages) 65 2 3.9 Feb/2004

Subjects: Science Essays > Biology > Human Biology

Human Eye

ose is to maintain the shape of the eye. The front sixth of this layer is clear and is known as the cornea. The muscles attached to sclera that prohibits us to freely move the eye are called the extra ...

(2 pages) 37 0 4.6 May/2004

Subjects: Science Essays > Biology > Human Biology

Human Vision Defects,What is 20/20 Vision?

ight entering the eye focuses in front of the retina instead of directly on it. This is caused by a cornea that is steeper, or an eye that is longer than a normal eye. Nearsighted people typically see ... s which work the same as glasses, laser surgery and convention surgery which alter the shape of the cornea.GlaucomaCauses of GlaucomaGlaucoma is the name given to a group of eye diseases in which the ...

(3 pages) 74 3 4.7 Jun/2004

Subjects: Science Essays

Lasik Vision Correction

r within a day. An instrument called a microkeratome is used to create a thin, circular flap in the cornea of the eye. The surgeon folds the flap back out of the way, and then removes some corneal tis ... excimer laser uses an ultraviolet light beam to precisely remove very tiny bits of tissue from the cornea in order to reshape it. When the cornea is reshaped correctly, it works better to focus light ...

(2 pages) 52 0 5.0 Jun/2005

Subjects: Humanities Essays > Health & Medicine


hat causes blindness?The eye and a camera have a lot in common. They both have compound lenses. The cornea and the lens are in charge of focusing light as it enters the eye. The lens is adjustable to ... fluid pressure inside the eye. A fluid called the aqueous humor fills the gap between the lens and cornea. There are valves in this part of the eye that regulate the eye's internal pressure. The incr ...

(12 pages) 82 0 5.0 Nov/2005

Subjects: Science Essays > Biology > Human Biology

What Process light goes through as it enters the eye travels to the brain?

When light enters the eye it first enters through your cornea, the transparent protective coating over your eye. Next it will pass through the pupil which ...

(2 pages) 13 0 4.0 Dec/2005

Subjects: Science Essays > Biology > Human Biology

Lasers: death rays or miracle breakthroughs?

d by lasers. One of the most common uses is laser eye surgery. The lasers sculpt the surface of the cornea and this treatment allows people to see without glasses. Barron's magazine says that "America ...

(3 pages) 11 1 0.0 Sep/2006

Subjects: Science Essays > Technology

A Comparison Between a Human's and Cow's Eye

to be dark brown. I know that human's iris come in different colour such as green, blue, gray, etc.CorneaThey look exactly the sameExterior Observations - A diagram illustrating the shape of Cornea, ... lls (cows and humans) look very similar. The cow's eyeball seemed to be almost round (excluding the cornea section). The cornea always seemed to be the part that was 'sticking out' of the eyeball.Func ...

(4 pages) 18 1 1.0 Dec/2006

Subjects: Science Essays > Biology

Bionic Eye: This report focuses on the development of the Bionic Eye, the people who work in this field, the effects this product has on society, & recent innovations.

pecialise in this particular field.Next Galen remedied eye deformities such as the curvature of the cornea and lens – an idea further developed for the implication of the Bionic Eye. From here on ... act - not considered a subspecialty per se, since most general ophthalmologists do surgery for this.Cornea, ocular surface, and external diseaseGlaucomaNeuro-ophthalmologyOcular oncologyOculoplastics ...

(7 pages) 20 0 4.0 Nov/2007

Subjects: Science Essays > Engineering


certain functions as we age like loss of color to how the way we see near and distant objects. "The cornea, that fluid-filled bad which guards the entrance to the eye, ages as we get the ti ...

(4 pages) 17 0 0.0 Feb/2008

Subjects: Social Science Essays > Psychology

Human Eye Vs. Camera Lens

n a camera protects the camera from dust and scratches to the lens. An eyelid protects the eye from cornea scratches due to particles entering the eye. Both the lens cover and an eyelid have the abili ...

(3 pages) 10 0 3.0 Feb/2008

Subjects: Science Essays > Astronomy

When I was fifteen, I stood in front of my

il have that day. The reason for this is that my eyes don not produce enought tears to lubricate my corneas. As a result, my corneas are scarred. Glasses cannot help me.There are many things I cannot ...

(2 pages) 1112 0 0.0 Feb/2008

Subjects: Social Science Essays > Education

Notes on eyes, vision problems, microscopes, telescopes, and cameras

Eyes:•Light tends to travel in straight lines.•Lens and cornea of our eyes bend light into a focused beam.•Cornea: outer most part of the eyes collects ... do.Vision problems:•When light hits an object, it bounces off and is reflected into the eyes. Cornea and lens are light bending parts of the eyes; they focus the light onto the retina, a light s ... the back of the eye.•Images are mostly focus onto the retina perfectly. But some people’s cornea is not shaped right, so they focus the image in front of the retina. Then the person is calle ...

(5 pages) 1192 0 0.0 May/2008

Subjects: Science Essays > Physics

Human Sight

he process of human sight is complex. Light enters through the clear covering of the eye called the cornea. It then passes through the adjustable opening in the eye called the iris. The lens, which is ... dry eye. Laser options include LASIK which is a procedure in which a surgeon slices a flap into the cornea and a laser removes some tissue from under the sliced area to reshape the cornea. Also, photo ...

(7 pages) 9 0 0.0 Sep/2009

Subjects: Science Essays > Biology > Human Biology

Cocaine Drug Addiction

e of its profound ability to stop blood vessels, it can lead to scarring and delayed healing of the cornea. However, prescription drug abuse has recently passed cocaine abuse as the leading cause of a ...

(4 pages) 5 0 0.0 Sep/2012

Subjects: Literature Research Papers