Is naked vision the same as myopia?

Abstract: in fact, people with the same degree of myopia may have different naked vision. After myopia, the distant light focuses in front of the retina, and the imaging on the retina will no longer be a focus, but will become a blurred spot.

naked vision refers to the clarity and clarity of seeing things directly without wearing any glasses.

myopia refers to the degree of myopia in the eye. Two different things, but there are also two associated parameters. Often the higher the degree, the worse the vision, on the contrary, the worse the vision, the higher the degree. Inversely proportional.

in fact, people with the same degree of myopia may have different naked vision. After myopia, the distant light focuses in front of the retina, and the imaging on the retina will no longer be a focus, but will become a blurred spot. However, the ability of photoreceptor cells on each person’s retina to analyze this blurred spot is different, and different people will have the same degree of myopia, but their naked eye vision is different. For example, some children are 200 degrees nearsighted, but their naked eye vision is still 0.6, and some children are also 200 degrees nearsighted (the blurred degree of imaging on the retina is the same as the former), but their naked eye vision is only 0.3. However, parents should pay attention that if children with myopia often squint or like to look sideways when watching TV or looking far away, they must have optometry and glasses, otherwise it will not only increase the degree of visual fatigue, but also further deepen the degree of myopia.

and

there is another situation. After wearing myopia glasses for a period of time, the naked eye vision of children with myopia may decline. For example, if the naked eye vision is 0.6 and the myopia degree is 200 degrees, after wearing glasses for a period of time, when taking off the glasses for naked eye vision examination, it will be found that his naked eye vision may be only 0.3, At this time, parents tend to be very nervous and think that their children will only wear glasses worse and worse.

and

what causes this phenomenon? In fact, before wearing frame glasses, the child’s brain will be forced to deal with the blurred images caused by myopia. When the child wears frame glasses for vision correction, the brain is “unwilling” to recognize the blurred images after taking off the glasses, which is the reason for the “deterioration” of naked eye vision. The fact is that the naked eye vision has not decreased, but the brain is unwilling to adapt. It’s like that people feel heavier when they get out of the swimming pool. In fact, their weight has not changed, but the human body has adapted to the buoyancy of the water.

visual acuity is a relatively subjective psychophysical index, which is affected by many factors, such as diopter, retinal analysis ability, brain recognition ability and so on. After myopia, naked vision will not get worse and worse because of wearing glasses. Once a child has myopia, he should have medical optometry and glasses in a regular hospital to help correct his vision.