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Samuel Beaubru/Joshua Henry
Mr.Matos
Anatomy & Physiology
26 August 2024
The Eye
When light enters the eye, it first passes through the cornea, which bends (refracts) the
light. The light then travels through the pupil, and the iris adjusts the pupil size based on
the light intensity. The lens further focuses the light onto the retina, where
photoreceptor cells convert it into electrical signals. These signals are sent via the optic
nerve to the brain, which processes them into the images we see.
The Has Several Components:
Cornea is the transparent, dome-shaped surface that covers the front of the eye. It helps
to focus incoming light. Iris is the colored part of the eye that controls the size of the
pupil, regulating the amount of light that enters the eye. The pupil is the black circular
opening in the center of the iris that adjusts size to control light entry. Lens is located
behind the pupil, it further focuses light onto the retina. Next is the Retina; it is the
light-sensitive layer at the back of the eye that contains photoreceptor cells (rods and
cones). These cells convert light into electrical signals.The optic nerve transmits visual
information from the retina to the brain. These are the functions of the eye
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Common Eye Conditions
Sometimes your eye has conditions that require treatment and thats what lead to people having
glasses or surgery. Let's go over some of the conditions. Myopia, in other words known as
nearsightedness, is a condition where distant objects appear blurry because the light is focused
in front of the retina.Hyperopia, in other words known as farsightedness, is a condition where
close objects appear blurry because the light is focused behind the retina.Astigmatism is an
imperfection in the curvature of the cornea or lens, causing blurred vision.Cataracts is the
clouding of the lens, leading to decreased vision.
Conclusion
In conclusion the eye is a very important part of the human body;;’ which should be taken care of
so you can see If you feel anything off with your eye see your doctor so that you can prevent
loss of sight early and continue to live a high quality life.
Works Cited
“Human Eye.” Encyclopædia Britannica, Encyclopædia Britannica, inc., 18 Aug. 2024,
www.britannica.com/science/human-eye.
National Eye Institute, U.S. Department of Health and Human Services, www.nei.nih.gov/.
Accessed 26 Aug. 2024.
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“Ophthalmology Research.” Harvard Medical School Department of Ophthalmology,
eye.hms.harvard.edu/research. Accessed 26 Aug. 2024.
“Ophthalmology Research.” Harvard Medical School Department of Ophthalmology,
eye.hms.harvard.edu/research. Accessed 26 Aug. 2024.
