Role in Biology
Biology is the study of natural science consisting of the study of life and living organisms. This includes their structure, function, growth, evolution, and distribution.
Role of Biology:
Biology is required during the process of laser eye surgery because the understanding of the human eye is very crucial to it. The understanding of the human eye allows the ophthalmologist to properly decide which operation is needed and how the surgery is done.
Journey Through the Human Eye:
Role of Biology:
Biology is required during the process of laser eye surgery because the understanding of the human eye is very crucial to it. The understanding of the human eye allows the ophthalmologist to properly decide which operation is needed and how the surgery is done.
Journey Through the Human Eye:
Anatomy of the Human Eye:
Cornea: The clear part of the eye covering the pupil and iris. It allows light to reach the eye, permitting sight.
Pupil: The round, dark, center of the eye. Regulates amount of light the retina receives.
Lens: The clear part behind the iris that helps focus light on the retina.
Iris: Controls the amount of light reaching the retina and gives the eye its color.
Ciliary body: Holds the lens in place, releases aqueous humor and does accommodation.
Optic nerve: Connects eye to the brain.
Fovea: Responsible for our central, sharpest vision.
Retina: Converts optical images into electronic signals for optic nerve to deliver.
Choroid: Provides nourishment to the back area of the eye.
Sclera: Eye's protective outer coat.
Pupil: The round, dark, center of the eye. Regulates amount of light the retina receives.
Lens: The clear part behind the iris that helps focus light on the retina.
Iris: Controls the amount of light reaching the retina and gives the eye its color.
Ciliary body: Holds the lens in place, releases aqueous humor and does accommodation.
Optic nerve: Connects eye to the brain.
Fovea: Responsible for our central, sharpest vision.
Retina: Converts optical images into electronic signals for optic nerve to deliver.
Choroid: Provides nourishment to the back area of the eye.
Sclera: Eye's protective outer coat.
Types of Refractive Errors and their Causes:
Myopia: Nearsightedness-where only nearby objects are clear or distinct. Cause: When there is a mismatch between the focusing power of the eye and the length of the eye (when the eyeball is too long.) The images focus infront of the retina rather than on it. This may also be caused by an abnormal shape of the cornea or lens. Procedure: Cornea must be made thicker/steeper. Hyperopia: Farsightedness-where only objects far away are clear or distinct. Cause: When length of the eye is too short and the images focus behind the retina rather than on it. This may also be caused by an abnormal shape of the cornea or lens. Procedure: Cornea must be flattened/thinned. Astigmatism: Distorted vision at any distance Cause: Front surface of eye, lens or inside of eye has different surface curvatures. Instead of it being smooth and even all over, some areas may be steeper or flatter. Procedure: Alter the shape of the cornea until it is more normal/even. Presbyopia: Also known as aging age. Makes it more difficult to see very close. Cause: Occurs when the natural lens in the eye loses flexibility. *All vision defects listed above can be treated by laser eye surgery except for presbyopia. |
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Side Effects of Laser Eye Surgery:
Importance:
Our understanding of the human eye allowed many new opportunities to arise. Due to our understanding of biology, not only are people allowed to correct their vision to make them perfect, but they are also able understand how the human eye acts in the case of refractive errors.
- Glare
- Blindness
- Corneal infection
- Seeing halos around images
- Difficulty driving at night
- Fluctuating vision
- Dry eyes
Importance:
Our understanding of the human eye allowed many new opportunities to arise. Due to our understanding of biology, not only are people allowed to correct their vision to make them perfect, but they are also able understand how the human eye acts in the case of refractive errors.