Nearsightedness
Nearsightedness or myopia occurs when the cornea is too steep
relative to the length of the eyeball. As light enters the
eye, the visual image comes into focus in front of the retina,
resulting in a blurred or distorted view of distant objects.
Farsightedness
Farsightedness or hyperopia occurs when the cornea is too
flat relative to the length of the eyeball. As light enters
the eye, the visual image focuses behind the retina resulting
in a blurred or distorted view of both distant and close objects.
Astigmatism
Astigmatism is a condition that occurs when the eyeball is
shaped more like a football than a basketball. The irregular
shape causes two focal points resulting in blurred vision.
The uneven bending of light rays entering the eye results
in distortion.
Presbyopia
Presbyopia occurs as a result of the inability of the lens
to focus incoming light. The lens becomes unable to change
shape to focus on close objects. This causes blurred vision
at a reading distance. Generally, presbyopia first occurs
when people reach their forties.
Cataracts
A cataract is the clouding of the eye’s lens. A cloudy
lens blocks the passage of light through the eye. It is caused
by a change in the chemical composition of the lens as a result
of natural aging. Cataracts are the leading cause of poor
vision in older adults.
Glaucoma
Glaucoma is the term for a diverse group of eye diseases,
all of which involve progressive damage to the optic nerve.
It is usually, but not always, accompanied by high internal
fluid pressure. The high pressure causes damage to the optic
nerve, resulting in permanent vision loss. Glaucoma is one
of the leading causes of blindness.
Macular Degeneration
Macular degeneration is a condition that damages the macula,
the central part of the eye. The macula is responsible for
central vision and the ability to see detail. Macular degeneration
is commonly a natural result of the aging process.
Floaters
Floaters are tiny clumps of fibers or cells inside the clear
gel-like fluid that fills the inside of your eye. They can
appear as little dots, circles, lines or clouds that move
in your field of vision. What you see are the shadows the
floaters cast on your retina.
Diabetic Retinopathy
Diabetic retinopathy is a potentially blinding complication
of diabetes that damages the retina. The blood vessels that
nourish the retina are often affected by the high sugar levels
associated with diabetes. Early diagnosis is very important
for successful treatment and prevention of permanent loss
of vision.
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