Ocular refraction anomalies

Ocular refraction anomalies is the eye focusing issue. There are three different types of ocular refraction anomalies, or myopia, hyperopia and astigmatism, and ocular refraction anomalies also appear to be a family disease.
　
Myopia and hyperopia is due to eye length and corneal focusing ability and relative proportions of the front of the eyes due to normal. When you suffer from myopia, objects before the image is focused in the retina and cause image blur. Suffering from hyperopia, images of objects after focusing on the retina. However, in children with mild or moderate myopia can usually see it very clearly, because young children eyes of adaptive capacity is very strong, they are able to focus on ahead to the retina. When the cornea when radians are not average, astigmatism occur, it will cause the eye cannot focus the various parts of the same object at the same time.
　
Symptoms of ocular refraction anomalies include:
　
1, willing to sit too close to the TV.
　
2, probably because not clear words on the Blackboard, homework problem occurs repeatedly, or doesn\'t seem to be very concentrated.
　
3, not clear of far.
　
If symptoms of hyperopia in children with very severe, so he strabismus may occur, or nearly very blurred.
　
Doctor will check the children\'s eyes, eye chart test is typically used. The other hand, can also use the method to check under the retina in children with eyesight, this check can be observed by influx and reflection from the retina move in the eyes of the situation. Optometrists and ophthalmologists are obtained by using the method of retinal examination data to selection of lenses. They may also be used in children with contact lenses. Dai Yin glasses usually are more clear than with-like glasses, and adolescent boys and girls are more like wearing contact lenses. Because Dai Yin glasses need proper health habits and strict with time, so it is not suitable for children\'s wear.
　
Once the child\'s body growth improvement, most of the symptoms of ocular refraction anomalies are not going to worsen. However, because the eye\'s adjustment ability gradually decline as we age, so early will not have any symptoms of hyperopia, middle-aged will gradually clear.