Changes in vision can range from mild to severe,
and may be lasting or only temporary. For example,
a person may become completely blind or may have
poor vision only under certain conditions.
What is going on in the
Common vision changes can
include - but are not limited to: · blurry
vision · double vision · cloudy
Vision changes can be caused by anything from
normal aging to life-threatening conditions. The
exact changes in the body will depend on the specific
cause and type of vision change.
What are the signs and symptoms of the condition?
Kinds of vision changes
include: · decreased sharpness of vision,
which means either being unable to focus on objects
up close or far away, or both · double
vision, which means seeing two of everything ·
loss of peripheral, or side, vision · total
loss of vision, or blindness · cloudy vision,
which feels as though the person is looking through
a dirty windshield · "blind spots,"
which means the person has areas of vision where
he or she can only see blackness
What are the causes and
risks of the condition?
The possible causes of
vision changes include: · refractive errors,
such as being nearsighted, farsighted or having
presbyopia. Presbyopia is when a person has a
hard time seeing things up close, due to age-related
changes in the eye. This condition affects most
people over age 50. It's the reason older people
often need bifocals or reading glasses. ·
infections of the eye, such as conjunctivitis
or keratitis · cataracts, a common condition
in older adults caused by changes in the lens
of the eye · glaucoma, a condition caused
by increased pressure within the eye ·
damage or inflammation of the nerves of the eye
· damage to the vision areas of the brain,
due to a stroke or brain tumor · damage
to the retina, the part of the eye that is similar
to the film inside a camera. The retina can be
damaged in diabetes, macular degeneration, or
retinal detachment. · trauma, or injury,
to the eye · strabismus, sometimes known
as lazy eye, in which the eyes don't line up properly
· temporal arteritis, an inflammation of
the arteries that supply blood to the eye ·
vitamin A deficiency · medicines, such
as the heart medicine digitalis, or the antibiotic
Other causes of vision
changes are possible. Sometimes, no cause can
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