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Bifocals can keep a child’s poor vision worse



Results of a new clinical trial can give more hope to children nearsighted, Often referred to as nearsightedness. The study found that children as young as 7 years old who regularly wore strong bifocals were less likely to be nearsighted than children with monocular or less strong three-year period. That shows these kids may preserve more eyesight as an adult.

Myopia is one of the most common vision conditions affecting people under 40 years of age. Although the causes of myopia are complex, both genetics and the environment are thought to play an important role. In particular, studies have suggestions Too much schoolwork and reduced pre-school outdoor play can contribute to myopia, possibly because children spend too much time concentrate Tightly on nearby objects.

Myopia tends to appear around 7 years old and continues to get worse until teenage years, average. DSpeakers have researched ways to slow its progress as much as possible during that time, including Specialized eye drops and bifocals and lenses. But this latest trial, called the Bifocal Study in Myopia Children, or BLINK, is the first to compare an experimental view.Soft bifocals, have better support for children with nearsightedness than other types of contact lenses.

When measuring people̵

7;s nearsightedness or farsightedness, ophthalmologists rely on a number called dioptres. Relative to normal vision, near-sighted people have a negative diopter. While both monocular and multifocal lenses can correct someone’s vision so that they can see things far away accurately, multifocal lenses also add more diodes, which can improve vision. In people with visual impairment in many ways (bifocals are the most common type of multifocal). One downside is that multifocal lenses tend to be more physically difficult to adjust than monocular lenses, and they is more limited than one’s vision.

In the trial, nearly 300 children, ages 7 to 11, were randomly selected to receive one of three types of contact. The kids get either high-bifocals supported (plus 2.5 dioptres), mediumsupporting bifocals (1.5 dioptres), or singlefar-sighted glasses. Then, they are observed in the next three years.

The main findings of the study, published in JAMA, the children with the strongest bifocals had the least loss of myopia (-0.60 diodes on average), while the children were wearing monocular-Lens vision is most impaired (on averagege -1.05 diop). And even though bifocals are known to be initially intolerant to adults, many adults experiencing symptoms such as headache, migraine, and balance problems, the children with the strongest corrective glasses reported no additional side effects, possibly because their eyes were more able to compensate.

“The long-term implication is that children wearing multifocal contact lenses are less likely to experience myopia as adults, which will ultimately make them less likely to experience vision-threatening complications such as retinal detachment, glaucoma and disease. macular (poor vision even with glasses or contact lenses due to myopia),“Lead author Jeffrey Walline, professor of optometry at Ohio State University, said in.” one email.

Walline and his team plan to stay tuned children in this study for many years to come, let them continue to wear bifocals for two years before switching them to monocularfar-sighted glasses. Hopefully these improvements will persist once they stop wearing bifocals. But according to Walline, the results of this and other tests show that doctors should do everything possible to slow the progression of myopia. and parents and children should be informed about current treatments in advance. Currently, one third of Americans are believed to be nearsighted. In China, majority of near-sighted children.

“This is a change from prescribing vision-regulating drugs to improve vision but not on the progression of myopia,” said Walline.

At the same time, although the children in this study were able to wear bifocals without problems, it is likely that this strategy Will not work for everyone. In that case, Walline added, there are still other options, such as orthopedic methods (using specialized contracts worn at night to temporarily reshape the cornea) or Short-eye drops atropine concentration, dilates the pupils and may prevent the eyes from elongating.


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