What are the different causes of myopia?

Myopia, otherwise known as myopia, is when one has problems with visiting objects at a distance because it has a longer eyeball or a curved cornea. There are several causes of myopia, the two most common inheritance and environmental factors. More rare causes of nearsightedness are other eye disorders such as keratoconus or cataracts, sudden development of nearsightedness due to other diseases such as diabetes or continuing the back of the eyeball in adulthood, called pathological short -paced.

Myopia is the result of light and images that are correctly focused when they enter the eye instead of focusing on the retina where they belong, they focus in front of it. This may be due to the shape of the cornea or lens in front of the eye that has too much curve, which directs light to the wrong place. This can also happen when the shape of a person's eyeball is longer than usual, causing the retina to be back further than it should be. In both cases, the light is focused on the retina instead of it, whichIt results in blurred images.

The most common causes of myopia is inheritance. During school years, nearsightedness is most often diagnosed. Children of parents who have myopia - and especially children from parents who are short -sighted - are much more likely to develop it. The percentage of myopic children without a family history of the problem is extremely low.

Often in conjunction with inheritance, another cause of myopia is the factors related to how the eyes are often used. There is quite a lot of evidence that shows that people who spend a lot of time on activities that require their eyes to focus on nearby objects, such as reading or using a computer, more likely to develop myopia. It is assumed that long periods of focus of detail can actually cause fine changes in the shape of the eyeball that will become a permanent over time. This might answerData for the fact that nearsightedness develops most often as soon as the child begins formal education and these activities are more common.

The other causes of myopia are much less common. One of them is called pathological nearsightedness, which means that the back of the eyeball is extended after the normal size of adults is achieved, causing fast, gradually deteriorating changes in sight that could eventually lead to blindness. Another cause of myopia is when vision changes are caused by a separate condition, such as uncontrolled diabetes or certain nervous system disorders. This is called psuedomyopia and is often improved as soon as the condition is causing it is treated.

secondary nearsightedness is when myopia results from other conditions that affect the eyes. This can be caused by other eye disorders, such as cataracts, or a state called keratoconus, where the cornea gradually changes the shape. This may also be due to premature birth. Depending on the pendingthem secondary nearsightedness Mohumprove or can remain permanently.