What is the probability of inheriting myopia?

The probability of inheriting myopia is actually quite high, especially for high myopia. That is to say, if both parents are highly myopic, the probability of their children suffering from myopia will be as high as 80 to 90 percent, so you must pay attention to proper eye protection.

1. I am severely myopic. Will my baby also be myopic?

Experts found in their investigation that there is no necessary connection between parents' myopia and their baby's vision, so myopic parents should not worry too much about their children becoming myopic. Experts say that 20% to 30% of a baby's vision is affected by genetic factors, while 70% to 80% is related to the acquired environment. It is recommended that parents should pay more attention to the environment in which their children live after the baby is born.

2. How heritable is myopia?

Regarding the issue of heredity, we can look at the results of two experiments. According to the data, if parents are severely myopic, it may indeed affect the vision development of the next generation, but it is not the decisive factor.

1. Experts collected data from 187 pairs of identical and fraternal twins, and calculated the heritability of the refractive index, axial length and corneal curvature of the two eyes. The research results show that if the heritability is 1, it means that the baby's vision is completely controlled by genetics, and 0 means that the baby's vision has nothing to do with genetics. Statistics also found that the heritability of vision of these twins is between 0.2 and 0.3.

2. A researcher conducted a study on 887 people. The research results found that in the normal vision group, 81% had both parents with normal vision, 13% had a father or mother with severe myopia, and only 6% had both parents with severe myopia; in the high myopia group, 44% had both parents with normal vision, 38% had a father or mother with severe myopia, and 19% had both parents with severe myopia.

3. What are the causes of baby’s myopia?

There are many reasons for myopia in babies, and genetics only accounts for a very small part. The child’s daily living habits and environment are the key issues that need attention.

Lack of nutrition in children, poor lighting at home, bad eye habits, lack of activity, etc. are all reasons that may cause children to become myopic. It is best for parents to observe their children's reactions to the environment on a daily basis, eliminate unfavorable factors, and avoid the onset of myopia.