Medically more than 600 degrees is called high myopia. High myopia is prone to retinal detachment (a serious blinding disease) due to its pathological changes, which will aggravate the formation of cataract and vitreous opacity and lead to decreased vision.
Although high myopia can play basketball, it is not suitable for playing basketball. Patients with high myopia should try to avoid strenuous exercise to avoid eye damage caused by collision during exercise.
It is generally believed that the degree of myopia will affect the visibility and clarity of vision, but few people know that myopia not only affects vision, but also determines the length of eye axis, which in turn will affect the thickness of retina.
According to clinical experience, a considerable part of high myopia is axial myopia, that is, axial elongation. The eye axis is elongated, just like a balloon is blown up, the balloon wall will become thinner, our retina will become thinner, and the pressure we can bear will become smaller.
If the patient takes part in strenuous sports such as playing basketball and collides, it is easy to make the retina fall off, and the direct consequence of retinal fall off is blindness. Generally speaking, for every 300 degree increase in myopia, the anterior and posterior diameter of eyeball increases by about1mm. Therefore, the higher the myopia, the greater the risk of retinal detachment.
Extended data:
People with high myopia should avoid strenuous exercise.
For people with high myopia, ophthalmologists have been emphasizing that strenuous exercise should be avoided as much as possible.
Myopia can be divided into three categories according to degrees: mild myopia (within 300 degrees), moderate myopia (between 300 and 600 degrees) and high myopia (above 600 degrees). The degree of myopia not only proves the degree of blindness, but also determines the length of the eye axis.
High myopia refers to myopia greater than 600 degrees. In addition to poor naked vision, the eyes of patients with high myopia will also have a series of pathological changes, such as rupture of posterior corneal elastic layer, posterior scleral staphyloma, vitreous liquefaction, thinning, atrophy or degeneration of choroid and retina, tear and detachment of retina, choroidal neovascularization and so on. When high myopia appears axial growth and fundus lesions, it is called pathological myopia.
People with high myopia are prone to retinal detachment due to strenuous exercise. Once the patient's myopia degree exceeds 600 degrees, it can be diagnosed as "high myopia". The vast majority of high myopia is "axial myopia", that is, the eye axis is longer than that of normal people (23.5-24 mm).
The axis of the eye is elongated, just as the balloon is blown up, the balloon wall will become thinner. Similarly, our retina will become thinner. With the thinning of retina, retinal holes and some degenerative diseases may appear at any time.
At this time, there is something wrong with the retina, but because most of the lesions are around the eyeball, the light will not focus on this area when using the eyes normally, so patients with high myopia are usually confused and unable to detect themselves, which is why many patients with retinal detachment have no symptoms before going blind.
With the thinning of retina or degenerative diseases, its ability to withstand severe vibration and intraocular pressure fluctuation will also weaken.
If patients with high myopia take part in strenuous sports such as football, basketball, volleyball, diving, jumping, weightlifting, boxing, carrying heavy objects, collision, etc., or extreme sports such as bungee jumping, roller coaster and skydiving, the external pressure changes sharply, and retinal detachment is prone to occur. The direct consequence of retinal detachment is blindness.
People with high myopia need to have their eyes examined regularly. Fundus examination is an important method to examine diseases of vitreous body, retina, choroid and optic nerve. High myopia is an important factor leading to many fundus diseases, so patients with high myopia should check their fundus regularly and treat them as soon as possible if they find lesions.
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