Myopia, hyperopia, amblyopia, astigmatism, presbyopia, what are you talking about?

Abstract: presbyopia, also known as Laohua, is a normal physiological aging. For example, the hair will turn white and the skin will relax, and the adjustment function of the eyes is slowly declining. There are old flowers around the age of 40, so you can’t see the nearby mobile phone books. Therefore, whether you are myopia, hyperopia or astigmatism, there will be the problem of aging.

believes that many parents know myopia, astigmatism, and occasionally heard of hyperopia, amblyopia and presbyopia. But many people don’t know what these are? What does it matter? Today, Jianyan Jun will come to organize and summarize for you. After reading this article, you can find out the relationship among them!

ametropia

myopia, hyperopia and astigmatism are collectively referred to as ametropia.

we can compare the eye to a ball (of course, the real eye is not a ball, which is convenient for readers to understand). We can imagine that an adult without ametropia has a standard ball with a diameter of 24mm (children’s eye axis is generally shorter than that of adults). Myopia, hyperopia and astigmatism are balls whose shape and size do not meet the standard.

usually the myopia eye is larger than the 24mm standard, so the object image seen by the eye will fall in front of the fundus and become blurred. Myopia cannot be cured because the eyeball has become larger and irreversible.

Usually, the hyperopia eye is smaller than the 24mm standard, so the object image seen by the eye will fall to the fundus of the eye and become blurred. The astigmatic eyes of

and

are irregular spheres, such as the shape and size of football.

if a person’s eye size and shape do not meet the standard, there will be myopia and astigmatism at the same time; Or hyperopia and astigmatism.

presbyopia

presbyopia, also known as presbyopia, is a normal physiological aging. For example, the hair will turn white and the skin will relax, and the adjustment function of the eyes is slowly declining. There are old flowers around the age of 40, so you can’t see the nearby mobile phone books. Therefore, whether you are myopia, hyperopia or astigmatism, there will be the problem of aging. Just for people with medium and low myopia, even if the adjustment function has decreased, but they can see the near without glasses, they mistakenly think that there is no presbyopia.

amblyopia

amblyopia is an eye disease. After excluding other eye organic diseases, the best corrected vision is lower than the normal age standard line, or the difference between the two eyes is more than two rows, it can be said to be amblyopia. It is generally caused by the lack of visual stimulation received by children’s eyes during their development. Moderate and high hyperopia, astigmatism and high myopia may lead to amblyopia.