In recent years, people started to be concerned more about their health. Nearsightedness (myopia) is a disease occurres around the world; it is an essential issue because it influences quality of life significantly. According to the American Academy of Family Physicians, Myopia is the most common eye problem. It affects as much as 40 per cent of the population in the US and Europe but between 70 and 90 per cent of some Asian populations.
Myopia is the medical term for nearsightedness. People with myopia see objects more clearly when they are close to the eye, while distant objects appear blurred or fuzzy. Reading and close-up work may be clear, but distance vision is blurry.
In a long time, it is believed that myopia is caused by lifestyle. Some bad habits like reading the book too closely, reading in caliginous light, having a lot of alcoholic drink, watching screen (including TV, computer, PSP, NDSL, etc) too long... are believed to contribute to the formation of myopia.
However, according to the recent research at St. Thomas' Hospital in London, PAX6, the gene that is found on chromosome 11, is linked to myopia, and it is a fundamental gene to eye development. Since it’s such an important gene, most mutations in this gene cause major eye abnormalities. That explains why some children are born susceptible to being near-sighted; their eyes are more sensitive to the environment.
Furthermore, a variety of genetic patterns for inheriting myopia have been suggested, ranging from a recessive pattern with complete penetrance in people who are homozygotic for myopia to an autosomal dominant pattern; an autosomal recessive pattern; and various mixtures of these patterns. One explanation for this lack of agreement is that the genetic profile of high myopia (defined as a refractive error greater than -6) may differ from the low myopia. Some researchers think that high myopia may be determined by genetic factors to a greater extent than low myopia.
While the genetic factors that influence the transmission and severity of myopia may not be changed easily, some environmental factors can be modified. They include reducing close work; reading and working in good light; taking frequent breaks, maintaining good nutrition, and having more outdoor activities.
Hope you all have great eyesight.
Myopia is the medical term for nearsightedness. People with myopia see objects more clearly when they are close to the eye, while distant objects appear blurred or fuzzy. Reading and close-up work may be clear, but distance vision is blurry.
In a long time, it is believed that myopia is caused by lifestyle. Some bad habits like reading the book too closely, reading in caliginous light, having a lot of alcoholic drink, watching screen (including TV, computer, PSP, NDSL, etc) too long... are believed to contribute to the formation of myopia.
However, according to the recent research at St. Thomas' Hospital in London, PAX6, the gene that is found on chromosome 11, is linked to myopia, and it is a fundamental gene to eye development. Since it’s such an important gene, most mutations in this gene cause major eye abnormalities. That explains why some children are born susceptible to being near-sighted; their eyes are more sensitive to the environment.
Furthermore, a variety of genetic patterns for inheriting myopia have been suggested, ranging from a recessive pattern with complete penetrance in people who are homozygotic for myopia to an autosomal dominant pattern; an autosomal recessive pattern; and various mixtures of these patterns. One explanation for this lack of agreement is that the genetic profile of high myopia (defined as a refractive error greater than -6) may differ from the low myopia. Some researchers think that high myopia may be determined by genetic factors to a greater extent than low myopia.
While the genetic factors that influence the transmission and severity of myopia may not be changed easily, some environmental factors can be modified. They include reducing close work; reading and working in good light; taking frequent breaks, maintaining good nutrition, and having more outdoor activities.
Hope you all have great eyesight.
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