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- Weak Synonyms, Weak Antonyms | Merriam-Webster Thesaurus.
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Synonym Discussion of weak weak , feeble , frail , fragile , infirm , decrepit mean not strong enough to endure strain, pressure, or strenuous effort. Seen and Heard What made you want to look up weak? Love words? Need even more definitions? Keep in mind that progressive lenses only reach their full potential when the position of the spectacle frames and the lenses are precisely matched to the wearer's face, eyes and lifestyle.
How a too-strong presidency and a too-weak Congress are destroying the American experiment
The different vision zones in the lens require precise lens centration. You should visit your optician and recalculate your vision profile if you suspect you're wearing the 'wrong' spectacle lenses, i. Children's eyes are still developing and undergoing numerous changes: a visual acuity of around 50 percent in the first year of life generally jumps to percent once they've reached the age of three.
Spatial vision is completely evolved by the time a child is nine years old, while their field of vision continues to develop until they're about Even then, this development process is not yet complete, because a person's eyes continue to grow until they become an adult. Thus it's important to have your child's vision tested frequently. An ophthalmologist, optometrist or a specialist optician should check regularly if the spectacle lenses still have the right prescription as this can change quickly, especially with children.
Protecting children's eyes from harmful UV radiation is also an absolute must, and kids' glasses must meet certain other criteria, like exceptional robustness. Glasses that are not optimally fitted can impact the eyes of both children and adults who are short-sighted or long-sighted. While an improperly fitted pair of glasses doesn't damage a child's eyes, it can hinder their vision from fully developing. Happily, a perfectly fitted pair of children's glasses can have the opposite effect: it helps foster optimum vision.
Various complaints can be traced back to tired eyes
For children with a form of short-sightedness particularly prevalent in Asia called progressing myopia, special lenses can help alter the progression of the refractive error. A pair of glasses can also assist in the prevention of visual problems resulting from certain types of squinting.
For this reason, babies and small children should have their eyes checked regularly by an ophthalmologist so that they can start receiving any necessary treatment as quickly as possible. You will find more information on the different types of squinting and the accompanying treatment options here. People often used to say that reading in poor light, such as by candlelight, would damage your eyes. As with other urban myths like "if you cross your eyes, they'll stick", there is no scientific foundation for this assertion. Still, in poor light or with the wrong spectacle lenses, the eye has to work harder to achieve good vision.
In addition to exhausting the eye muscles prematurely and temporarily limiting a person's vision, no damaging effects have been identified. The greatest risk to the health of our eyes comes from natural light emitted by the sun. The UV radiation found in sunlight poses both short-term and long-term risks if you don't adequately protect your eyes.
Weak Projectiles/ or too strong walls ?
For complete protection, sunglass lenses with an enhanced UV filter or clear spectacle lenses with high-quality UV protection are a must. You will find more information on this topic here. To sum up: there's no evidence that incorrectly or poorly fitted spectacle lenses can permanently damage a person's eyes. Moreover, as far as anyone knows, reading in poor light or using brightly illuminated screens is mostly just unpleasant rather than damaging. Since children's eyes are still developing, any visual defects should always be optimally corrected.
And everyone should protect their eyes from harmful UV radiation. When it comes to 'bad vision', our eyes can take a lot of abuse. Nevertheless, a well-fitted pair of glasses not only prevents the side effects of uncorrected visual defects, but also increases wearer comfort and improves a person's quality of life. Tags: Sunglasses. Tags: Sunglasses Children's Glasses.
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Weak Synonyms, Weak Antonyms | Merriam-Webster Thesaurus
Find Optician. Home Explore Better Vision Understanding Vision Too strong, too weak or poorly fitted: what can the wrong spectacle lenses do to your eyes. How do incorrectly fitted glasses affect the wearer? Can the wrong pair of progressive glasses damage your eyes?
Children need a good pair of glasses. Does reading in poor light or by candlelight damage your eyes? Children need a good pair of glasses Does reading in poor light or by candlelight damage your eyes?