Vision Problems in Children
Vision problems that may affect your child
Eye disorders that affect vision can be divided into refractive and non-refractive
Refractive errors. These eye disorders cause blurred vision. They occur because the shape of the eye
does not focus the light that enters the eye properly.
Non-refractive errors. These eye disorders are caused by eye diseases. They are not caused by refractive
What are refractive errors?
Refractive errors are seen in almost 20% of children. The following are the most common
refractive errors, all of which affect vision:
Nearsightedness (myopia). Being nearsighted means that a child can see clearly close up but has problems seeing
things far away. It's often not present at birth but begins to develop as the child
gets older. It's often seen in children around age 9 or 10. For example, a child may
not be able to read the blackboard from the back of the room but can see to write
and read without a problem. Other symptoms may include headaches or nausea after reading.
A child may hold books close to their face or write with their head very close to
Farsightedness (hyperopia). A child who is farsighted may or may not see things close to them, but they have
no problem seeing things far away. Squinting, eye rubbing, lack of interest in school,
and trouble reading may be seen in children with hyperopia.
Astigmatism. This condition makes objects that are close up and at a distance look blurry. It's
caused by an abnormal curvature of the cornea. It can start in childhood or in adulthood.
Astigmatism can be easily corrected if it is causing problems. Some symptoms may include
headache, eye strain, trouble reading, and extreme tiredness (fatigue). Depending
on the severity, eyeglasses or contact lenses may be needed.
Lazy eye (amblyopia). Amblyopia is a common visual condition. It often happens when there is no problem
with the structure of the eye. The decrease in vision occurs when one or both eyes
send a blurry image to the brain. Then the brain learns to see only blurry with that
eye. Early treatment can lead to better success.
Crossed eyes (strabismus). Strabismus is one of the most common eye problems in children. It's when the eyes
don’t line up with each other. The eyes (one or both) may turn inward, outward, up,
or down. Sometimes more than one of these conditions are present. It's also called
crossed eyes or wandering eye. Children younger than 6 months old may have a common
form of strabismus that comes and goes. Most strabismus is caused by abnormality of neuromuscular
(including brain) control of eye movement. Strabismus caused by poor eye muscle strength
is less common. Symptoms may include squinting, not being able to judge distance to
pick up things, closing one eye to see better, dizziness, or the eyes moving inward
or outward. Early diagnosis of the underlying problem is key to prevent vision loss.
Treatment may include patching the stronger eye to strengthen the weaker eye, eyeglasses,
eye drops, surgery to straighten the eyes, or eye exercises.
What are non-refractive errors?
The following are some causes of non-refractive errors:
Glaucoma occurs when the fluid pressure inside the eyes (intraocular pressure, or
IOP) slowly rises. This happens because the fluid (called aqueous humor), which is
produced inside the eye and normally drains out of the eye, can't drain correctly.
Instead, the fluid collects and causes pressure damage to the optic nerve. This nerve
connects the eye to the brain. This condition also causes vision loss. Glaucoma is
classified according to the age when it starts. Glaucoma that begins before age 3
is called congenital (present at birth) glaucoma. Glaucoma that happens in a child
is called childhood glaucoma.
Symptoms may include excessive tearing, light sensitivity (photophobia), closing one
or both eyes in the light, a cloudy and enlarged cornea, one eye being larger than
the other, and vision loss. Treatment often includes surgery. Without treatment, blindness
A cataract is a clouding or unclear (opaque) area in the lens, which is normally clear
(transparent). As this clouding happens, it prevents light rays from passing through
the lens and focusing on the retina. The retina is the light-sensitive tissue in the
back of the eye. This clouding is caused when some of the protein that makes up the
lens clumps together and interferes with vision. Cataracts can affect one eye (unilateral)
or both eyes (bilateral). Cataracts in children are not common. A child may be born
with cataracts (congenital). Or the condition may develop later in life (acquired).
Possible causes of cataracts include the following:
Other childhood diseases, such as rheumatoid arthritis
Complications from other eye diseases, such as glaucoma
Most congenital cataracts (those present at birth) occur in children who also have
other eye problems or other health problems. In about 25% of children born with congenital
cataracts, the condition is due to a genetic cause, such as a metabolic disorder (caused
by an inherited enzyme deficiency) or a chromosome abnormality (such as Down syndrome).
Symptoms of a cataract may include the following:
White pupil on flashlight exam
Eyes don’t line up
Involuntary rhythmic movements of the eyes back and forth, up and down, around, or
Cloudy or blurry vision
Lights seem too bright or present a glare or a surrounding halo
Treatment often includes cataract surgery.
Retinoblastoma is a rare cancer of the retina. The retina is the innermost layer of
the eye. It's located at the back of the eye. It receives light and images needed
for vision. About 250 children in the U.S. are diagnosed with this type of cancer
each year. It mostly happens in children younger than age 5. Most cases happen between
infancy and age 2. Both boys and girls are affected equally. Retinoblastoma can happen
in either eye. But in about 1 in 4 cases, the tumor is in both eyes.
Symptoms of retinoblastoma may include:
Leukocoria. A white light reflex that happens at certain angles when light is shown
into the pupil.
Crossed eyes (strabismus). This is when the eyes don’t line up with each other. One
or both eyes don’t seem to be looking in the same direction. It's also called wandering
Pain, swelling, or redness around the eyes.
Treatment for retinoblastoma may include one or more of the following:
Surgery (removal of the eye, which may be followed up with an artificial eye implant)
Heat treatment (uses extreme heat directed toward cancer cells)
Laser therapy (uses light to destroy the blood vessels that nourish the tumor)
Cryotherapy (uses a freezing process to destroy the tumor)
Additional follow-up treatments may include:
Fitting and training for a prosthesis (artificial eye)
Blind or decreased vision adaptation training
Supportive care (for the side effects of treatment)
Antibiotics (to prevent or treat infection)
To protect your child, the American Pediatric Association recommends eye exams at
all well-child visits. This means every age group, from newborns to teenagers. If
your child complains of any vision problems, or if you notice vision-related issues,
contact your healthcare provider right away.