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How each lens fits and feels depends on each individual wearer’s eyes. These are split into hydrogel or silicone hydrogel contacts. Contact lenses on the other hand, are made from a range of hydrogels. Lens material: in days gone by, glasses were made from actual glass, nowadays, most glasses are made of a lightweight plastic. Along with the base curve, this determines how the lens fits on the eye. Referral for vision therapy is a great solution for kids suffering from this issue, and sometimes progressive glasses can help the eyes adjust more easily from near to far.Contact lenses prescriptions include certain specifications that are not part of a glasses prescription, these include:īase curve: the base curve measures the curvature of the lens it is determined by the actual shape of your eye and produces the right lens fitting.ĭiameter: the lens diameter specifies the overall size of the lens. Their eyes won't be able to adjust back and forth between distance and up close, so distance looks blurry. If a child has accommodative dysfunction, they won't be able to see clearly in the distance because their focusing system is "locked up" at near. I always do a quick and easy accommodative test (NRA/PRA is a go to for responsive kids - MEM Retinoscopy on younger) to rule out accommodative dysfunction. But sometimes a child might have no real distance vision issue but won't be able to read the chart for a true medical reason. Glasses these days are the cool thing to have, and sometimes when a child's friend gets glasses it becomes mission number one for your child to have glasses too. It's easy to think a child that has no prescription but won't read the chart is malingering (the polite doctor term for faking it).
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For more on myopia control check this post. It's better to adjust their glasses mid year to achieve clarity than to let them go another 6 months with blurry vision with that risk of accelerated rate of myopic progression. Remind parents that if their child complains of changing vision in 6 months, go ahead and schedule a follow-up appointment to get things rechecked.
#SPECTACLE PRESCRIPTION FULL#
Prescribing the full amount to achieve 20/20 vision in near sighted ( myopic) school-aged children is the best approach. Scientists theorize that the presence of any blurred vision causes children's eyes to change at a faster speed. A 2002 study proved that undercorrecting near sighted children by +0.75D caused their eyes to worsen faster than if they were prescribed their full strength prescription. Parents often worry that their child's prescription is changing too fast, and some may even ask the doctor to cut back their child's Rx so it's not "too strong." But a prescription that is under minused in school aged children (made weaker on purpose) is much worse for the developing eye than one that corrects vision clearly.
#SPECTACLE PRESCRIPTION HOW TO#
Today we're talking the art of prescribing for kids - when to prescribe, what to prescribe, and how to get kids that need glasses wearing them! The latter are one of the most challenging because as a concerned parent you might worry something must be horribly wrong your child can't even see the big E! And then of course the doctor tells you "nope all fine, no glasses here" to the wail of your child's disappointment. Some kids are shy some are scared some really, really, really want glasses.
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When prescribing for children, doctors are at a distinct disadvantage because the subjective responses of the patient can be unreliable or just plain unusable. The visual system is so complex, involving not just the eye itself but the muscles in and around the eye and the visual cortex of the brain, that a measurement of the eye is just one component to a successful glasses prescription.
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We don't use a machine to measure your eye and spit a number that's immutable and definite - if we did it wouldn't look that great to you, the wearer. Common misconception: a glasses prescription isn't a finite, objective number.