Items Tagged With nearsightedness
Written By: John Fuda
2007-06-04 02:24:03
glasses? How do I know whether my child needs glasses? Can a parent always tell by observing the child whether glasses are needed? If glasses are needed, do the glasses improve the eye condition or will glasses be needed permanently? Do glasses make
farsightedness (
hyperopia),
nearsightedness (
myopia) or
astigmatism "go away" or not. If my child needs glasses, should they be worn during all waking hours or only for distance vision or only for reading? Should the glasses be worn for television? And by the way, is it harmful for children to sit close to the TV, or "on top" of the TV as some parents maintain their children wish to sit?These are all good questions. What are the answers?
First, some kids need glasses as early as four months of age. Which kids? Kids whose eyes are crossed at age four months may need eye muscle surgery but some children are extremely farsighted and glasses may straighten the eyes if prescribed promptly. There are children who need glasses for farsightedness at four months of age and have complete restoration of
binocular vision. Glasses for children who have crossed eyes and are very farsighted should wear glasses during all waking hours.Some children may have one eye that is in focus and one that is out of focus, that is, has excessive farsighted (hyperopic), nearsighted (myopic) or astigmatism. These children will seem to have normal vision judging by their behavior (it turns out that the vision demands of a toddler are not really that great-one can toddle around even with subnormal vision). But an infant or toddler that seems to see normally may have one eye that is very much out of focus. The brain will soon establish more connections with the better seeing eye and fewer connections with the eye that is out of focus. Vision will be further lost in the eye already out of focus. The out of focus eye may remain perfectly aligned with the normally seeing eye, so a physician (not an eye doctor) who looks at the eye will not notice any abnormality despite the fact that one eye has very poor vision.
This condition in which the brain connections are greater to one eye is called
Amblyopia. This is a common condition affecting one of out of every 40-50 children. In the past, this condition was often not detected until the child had the vision in each eye checked by covering each eye and reading letters or recognizing pictures at age 5 or 6 years of age. By then it was often too late to treat the amblyopia. Parents often feel very guilty they missed a condition in which one eye is legally blind and now the child is too old to treat.Amblyopia can be detected earlier in one of two ways. First, your child will usually be verbal enough to talk to a stranger (one who is kind and friendly, like your local pediatric
ophthalmologist or your pediatrician or family physician) by age three years. At that age the vision in each eye can be assessed using a picture chart. There are even home vision tests for assessing vision at age three years. It is VERY IMPORTANT that your child does not peek. He or she will try to please you by reading the chart with the bad eye, and the kid with one bad eye is the one who will peek. Many kids with amblyopia have escaped early detection when the kid did what he was asked to do: he read the chart, but he "peeked" using his or her good eye and the amblyopia was not detected and treated at an early age.Second, amblyopia can be detected by a technique known as photorefraction. A picture is taken of each eye in the office of the pediatrician or family physician. By observing the camera reflex from the eye, a skilled technician or physician can detect that one or both eyes is out of focus and suggest a more complete examination by a pediatric ophthalmologist who can tell you whether your child needs glasses.
Third, you could opt for a complete
Eye Exam for your child. When would be the best time for this initial eye exam? If you have a family history of an eye disease that begins at a young age, such as cataracts that develop in childhood or retinoblastoma (the most common malignant eye tumor in children), your child needs an eye exam in the first two months of life. If there is a family history of amblyopia ("
Lazy eye") or eye muscle problems, it would be best to have an eye exam between ages 6 and 12 months of age. If your child appears to see normally and the eyes line up and work together, the best time for a complete eye exam would be between ages three and four years. It may seem like a large expense if your child has normal vision and normal eyes; but remember, by age three or four years most parents will have already had their child's teeth checked. These are teeth that will come out and be replaced by normal ones. Teeth can be replaced with fully functional ones made of synthetic polymers. Once vision is lost to amblyopia. sight can usually only be regained during a critical period in childhood. That period may be only 2-4 years of life. The first two to four years, which are the most important years in visual development. Considering that the life expectancy of a child born today is probably about 90 years, an early eye exam or at least a screening test at a young age is an excellent investment.Some children are extremely nearsighted (myopic) at a young age. By age two or three years, these kids will be really sitting up close to the TV as well as holding objects us close to their face. These kids usually take readily to glasses and wear them quite well.
Some other kids have larger amounts of astigmatism (eye is not shaped completely round like a basketball but is shaped more oval like a football). Kids with large amounts of astigmatism will often wear glasses well at age 1-3 years. Many other kids have only small amounts of astigmatism and do not require glasses at all. Sometimes the astigmatism" goes away" by itself, other times glasses are needed at an older age for reading and schoolwork. If the astigmatism is very large or present in a larger amount in only one eye, glasses may be needed during all waking hours.
Glasses do not make astigmatism "go away." Glasses do not change the shape of the eye. The eye undergoes natural slight changes in shape with age and astigmatism may increase or decrease in amount depending on the growth of the eye.
The most common form of nearsightedness (myopia: vision is better at near than distance) does not begin until about age 5-7 years of age, sometimes later. In general, the earlier the nearsightedness begins, the more nearsighted the child will ultimately become. Usually the nearsightness increases in amount every year as the child grows. The greatest changes occur between age six and twelve, but many children continue to become more nearsighted even as teenagers. There have been many, many forms of treatment to attempt to prevent myopia or nearsightedness from developing or progressing (for example, eye drops that keep the eyes dilated,
bifocals or hard contact lenses). But the only therapy that has been proven effective is refractive surgery, such as
LASIK (
laser-in-Situ-Keratomileusis) and
radial keratotomy in which multiple small incisions are made in the front clear part of the eye called the
cornea. In general, this surgery is not done until the eye has finished its growth or age 18-21 years of age. A few children have undergone these procedures but most kids' nearsightedness is best treated with glasses or contact lenses.Wearing glasses does not make your child become less nearsighted. In fact, the opposite may well be true: wearing glasses for nearsightedness may increase the nearsightedness by causing the eye to focus more at near than a child would without the glasses. This extra focusing at near MAY contribute to an increase in nearsightedness in some children.
If your child is only slightly nearsighted, it may well be best simply to avoid glasses and obtain another eye exam in six to twelve months. If your child needs glasses for small amounts of nearsightedness and can still see clearly at near, it is best for your child to remove the glasses for reading other near work. If your child is significantly nearsighted and needs glasses simply to get around well, it is probably best to wear the glasses almost all the time.
Who is the best person to check your kid's eyes? An ophthalmologist or
optometrist is skilled at checking the focusing of the eyes. But the visual needs of children are far different from adults. Children may need glasses for all waking hours to treat amblyopia. Other children whose eyes are only slightly out of focus may be best served by not wearing glasses at all. Glasses for kids can be very expensive: a two year old may easily need new glasses every two to three months at $150 or more for each pair. So a parent should be very careful who makes the decision regarding their kids' vision.The person with the most experience in making a decision regarding your child's need for glasses is a professional that sees only children and specializes in children's eye problems. This person is a pediatric ophthalmologist: this professional sees many children every day and studies only eye problems in kids: he is the best person to see for this important decision regarding your child's vision.
Richards and Hinrichsen, Pediatric Eye Specialists
http://eyeseerichards.com/faqs/EyeglassesInChildren.html
http://eyeseerichards.com/
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Written By: John Fuda
2007-06-04 02:09:36
glasses for children. Some believe that if children wear glasses when they are young, they won't need them later. Others think wearing glasses as a child makes one dependent on them later. Neither is true. Children need glasses because they are genetically nearsighted, farsighted, or astigmatic. These conditions do not go away nor do they get worse because they are not corrected. Glasses or contacts are necessary throughout life for good vision.
nearsightedness (distant objects appear blurry) typically begins between the ages of eight and fifteen but can start earlier.
farsightedness is actually normal in young children and not a problem as long as it is mild. If a child is too farsighted, vision is blurry or the eyes cross when looking closely at things. This is usually apparent around the age of two. Almost everyone has some amount of
astigmatism (oval instead of round
cornea). Glasses are required only if the astigmatism is strong.Unlike adults, children who need glasses may develop a second problem, called
Amblyopia or
Lazy eye. Amblyopia means even with the right prescription, one eye (or sometimes both eyes) does not see normally. Amblyopia is more likely to occur if the prescription needed to correct one eye is stronger than the other. Wearing glasses can prevent amblyopia from developing in the more out-of-focus eye.Children (and adults) who do not see well with one eye because of amblyopia, or because of any other medical problem that cannot be corrected, should wear safety glasses to protect the normal eye.
Eyecare Associates of East Texas
http://www.eyecaretyler.com/pediatrics.htm
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Written By: John Fuda
2005-11-18 00:00:00
Great News! Since
InfantSEE launched in June 2005, over 4,000 infants' eyes and vision has been assessed. The InfantSEE newsletter keeps the topic of infants' vision and eye health front of mind for parents, teachers, and others concerned about the general wellness of infants and children.Note to Parents: if your child has already received an InfantSEE assessment, we encourage you to share this newsletter with others who may not have heard about the program yet. If your child hasn't yet received an InfantSEE assessment, click here to find an InfantSEE provider in your area.
Note to Educators: please share this information with the parents of your students and others in the community.
The InfantSEE program is grateful for the word-of-mouth recommendations of individuals like you. Thank you for spreading the word about the importance of early detection of eye and vision problems. InfantSEE participating doctors provide a one-time comprehensive eye and vision assessment to infants in the first year of life at no cost.
As They Grow: Developmental Milestones for Infants' and Children's Vision
In addition to the actual eye and vision assessments provided through the InfantSEE program, optometrists educate parents and the public about infants' and children's vision in general. An important fact that is not widely known is that vision is LEARNED. Provided below are milestones of a child's visual development.
- Before birth: Proper prenatal care and nutrition can help Baby's eyes and associated nervous system to develop.
- At birth: Baby's eyes should be examined for signs of congenital eye problems. While these are rare, early diagnosis and treatment are important to Baby's development.
- Two months: for the first six to eight weeks of life, it is normal for Baby's eyes to not always track together. This should not be a concern unless Baby’s eyes are never aligned or their alignment does not gradually improve. Tearing is normal for many infants because the tear drainage ducts have not opened. They usually open on their own, but the doctor should be informed and he or she will suggest what to do to stimulate the opening of the ducts.
- Four months: Baby should begin to follow moving objects with the eyes and reach for things, first by chance and later more accurately, as eye-hand coordination and depth perception begin to develop.
- Six months: Baby should receive first comprehensive eye assessment. Click here to find an InfantSEEâ„¢ provider in your area. The
optometrist will test for excessive or unequal amounts of
nearsightedness,
farsightedness, or
astigmatism and assess the quality of eye movement ability as well as all aspects of eye health. - Between four and eight months: Baby should begin to turn from side to side and use his/her arms and legs. Eye movement and eye/body coordination skills continue to develop, and both eyes should focus equally.
- From eight to twelve months: Baby is mobile now, crawling and pulling up. Baby is using both eyes together and judging distances; grasping and throwing objects with greater precision. Crawling is important for developing eye-hand-foot-body coordination.
- From one to two years: Baby's eye-hand coordination and depth perception continue to develop, and Baby begins to understand abstract terms.
- Age three: Child should have a comprehensive
Eye Examination to make sure vision is continuing to develop properly and there is no evidence of eye disease. If needed, your optometrist can prescribe treatment including
glasses and/or
Vision Therapy to correct a vision problem. - Preschool years: Child develops visually-guided eye-hand-body coordination, fine motor skills and the visual motor skills necessary to learn to read. Parents should watch for signs that may indicate a vision development problem: short attention span relative to Child's age; difficulty with eye-hand-body coordination in ball play and bike riding; avoidance of coloring and puzzles and other detailed activities.
Coming up in the next issue:
Glossary of children's vision terms
InfantSEE brochures available for local groups
Conversation with an InfantSEE participating doctor
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Written By: John Fuda
2005-11-10 07:17:29
What is amblyopia?
By the BabyCenter editorial staff, from: http://www.babycenter.com/refcap/baby/babyills/babyeyes/10890.html
Amblyopia (also called
Lazy eye) develops when the brain shuts off or suppresses vision in one eye. This can happen if your baby's eyes are misaligned or if he can't see as well with one eye because of
nearsightedness,
farsightedness,
astigmatism, or something that's blocking clear vision in that eye, like a
cataract or a drooping eyelid. About 3 to 6 percent of children under the age of 6 develop amblyopia. Treatment is most successful before age 5 or 6, although recent research shows that even older children may recover their vision. If ignored, though, amblyopia can result in permanent vision loss.
How to recognize amblyopia
Identifying the problem isn't easy because children can get along fine using only one eye. The less-used eye may look perfectly normal, even though your baby isn't using it to see. Your child's doctor should routinely test for amblyopia (as well as
strabismus) by checking the eyes independently and together. But pediatric
ophthalmologist James Ruben, a member of the AAP section on ophthalmology, says it's also a good idea for you to occasionally test the vision in your child's eyes at home.
Testing for amblyopia at home.
Here's a simple way to get an idea of whether your baby's eyes are both pulling their weight:
While your baby is interested in an object ? a toy bear that you dance in front of him, for example ? cover one of his eyes (it helps to have a partner for this). See if he follows the object with his uncovered eye as you move it. Then cover the other eye and see if he follows the object just as well ? and as far.
It's a little tricky to test a baby, who may lose interest or become distracted before your informal test is over. But if one eye seems weaker, try testing it again another time ? maybe starting with the other eye first.
If your baby seems to be able to see better with one eye than the other, schedule an appointment with either your child's doctor for a vision screening test or an ophthalmologist, who can diagnose and treat the problem.
What can be done to treat amblyopia?
The first step is to address any underlying problem ? by correcting the astigmatism or nearsightedness with
glasses or removing a cataract with surgery, for example. Once that's taken care of, the goal is to encourage your child's brain to connect with the weaker eye, eventually improving its ability to see.
Glasses don't help to improve this eye-brain connection. In fact, one sign of the condition is that your baby's vision is still worse in one eye when he's wearing the correct glasses. That's because glasses work to help the eye focus ? like a camera
lens ? but if the brain isn't communicating well with that eye, there won't be a clear picture. Instead, your doctor will probably recommend covering your baby's stronger eye with a patch or using eyedrops once a day to blur the vision in that eye, either of which will force the brain to use the weaker eye. This process could take weeks, months, or even years.
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Written By: John Fuda
2007-06-04 03:52:05
InfantSEE assessment offers early detection of potential eye and vision problems as a complement to the eye screening conducted in a pediatric well-care visit. A comprehensive assessment between the ages of 6 months and 12 months is recommended to determine healthy development of vision. Risk factors for many eye conditions, including
Amblyopia (often referred to as
Lazy eye), muscle imbalances, and some ocular diseases, have no signs or symptoms and may not be detected in a well-baby check-up. Such pediatrician visits include care and services performed by all personnel and last an average of 22.1 minutes, which is ample time for screening and detecting potential large-scope health problems. However, significant risk factors for eye and vision disorders are not detectable by base-level infant eye screening, and even early retinoblastoma, the seventh most common pediatric cancer, is detected more than 80 percent of the time outside the doctor’s office by a family member or friend.How an InfantSEE Assessment Is Conducted
During the assessment, parents might hold the baby on their laps or on a lap pillow and might also assist by holding targets or toys to hold the baby’s attention. Optometrists will gauge the babies’ comfort levels with specific techniques and adjust them as necessary, but will typically evaluate
visual acuity,
refraction, motility, alignment, binocularity and overall eye health. As detailed below, these tests will determine signs of
strabismus, amblyopia or diseases of the eye.- Visual Acuity/Refractive Status – Assessments for visual acuity and refraction are largely intended to measure for
nearsightedness or
farsightedness – common risk factors for amblyopia, which develops when an otherwise healthy eye has not received adequate use during early childhood. Nearsightedness or farsightedness in an infant’s developing eye can cause the brain to favor seeing through one eye, suppressing vision in the other eye, which can lead to permanent vision impairment. Because the traditional eye chart with letters or symbols cannot be used with infants, assessment of visual acuity may include tests to ensure that the infant can fix his eyes on an object and follow it. Tools such as gray cards with various sized stripes or pictures may be used to determine at which objects the baby prefers to look, and at what distances. The doctor may also use lenses and light from a small hand-held instrument to assess how the eye responds to particular targets. Some doctors use photographic testing to analyze the
pupil reflex in the photo. In many cases, the infant may have some degree of refractive condition not requiring intervention. - Ocular Motility/Alignment/Binocular Potential – Assessments for motility, alignment and binocularity can determine the presence of strabismus, which occurs when one eye does not aim at the same object as the other eye. Strabismus can lead to amblyopia, if undetected, or may indicate a number of ocular diseases. These assessments also measure eye coordination, which is the ability of both eyes to work together as a team to create one three-dimensional image in the brain. Good eye coordination, a skill that is not innate and must be developed, keeps the eyes in alignment. Later in life, poor eye coordination can make reading for extended periods of time difficult and may result in avoidance of detail work, such as writing or art work, poor reading comprehension and clumsiness. Using very simple instruments, such as penlights, finger puppets or toys, the
optometrist tests the eye’s ability to move by getting the baby’s attention and observing how the baby follows the movements of the object. By shining a penlight toward the baby’s eyes, the doctor can gauge eye alignment, which is straight if the light is reflected in the center of both eyes. The optometrist can also assess a baby’s depth perception by using red/green
glasses (commonly known as 3-D glasses), and displaying 3-D pictures. To a baby with good eye coordination, the pictures will appear in 3-D, and the infant will then reach to touch the picture. - Overall Eye Health – The optometrist will assess the eye’s external structure as well as
eyelids, tear ducts and other parts of the eye. Often, the optometrist can detect existing allergies from an external assessment. Pupil function is then checked, followed by an examination of the inner eye through dilated pupils, which can also detect ocular diseases such as retinoblastoma, the seventh most common pediatric cancer.
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