Abstract: people with high myopia often have low intraocular pressure, but the optic nerve has the performance of glaucoma. It turns out that after the axis of myopia is elongated, the layer of optic nerve cells on the retina is pulled, and the compressive capacity is reduced. Although the intraocular pressure is normal, it has caused damage to this layer of fragile cells. What’s terrible is that these injuries can’t be recovered!
01 why is it easy for myopic people to suffer from cataract early?
A: at present, the reason is unknown, but the fact is before us – in recent years, more and more people have developed cataract early because of high myopia.
cataract is an eye disease that causes vision loss due to lens opacity.
when light enters the eye, it needs to be refracted by the lens to reach the retina. Through the shape change of the lens, different refraction degrees are formed, so that we can see clearly from far to near, just like the “focusing” of mobile phone photography. So the lens is a very important organ in the eye!
lenses are transparent under normal circumstances, and light can pass through easily; Once it becomes cloudy, we will have vision problems.
in our daily life, we will feel that cataract is a “geriatric disease”, which only the elderly will get. In fact, there are also young cataract patients, and today, The biggest source of cataract in young people is that the ocular axis is too long (the degree of myopia is too deep).
why does myopia make cataract report early?
explanation 1: the lens is pulled
Myopia not only lengthens the eyeball, but also enlarges the width of the eyeball; The lens will also become diseased due to the pulling of the expanded eyeball. Explanation 2 of
: the change of substances in the eyeball
because the eyeball is elongated, the water contained in the posterior vitreous body will increase accordingly, and the compressive force on the lens will increase; Coupled with the changes of some metabolic substances in the eyeball, the lens changes early.
how to prevent cataract?
the environmental factor most likely to cause cataract is ultraviolet light.
suggestions: 1 If you are outdoors for a long time in the daytime, pay attention to the use of sunglasses; 2. Check whether your myopia glasses have anti ultraviolet (anti UV) function.
in addition, if the degree of myopia soars for several Baidu in a short time, you should suspect that it may be cataract and must be checked in time.
02 why are people with myopia prone to flying mosquitoes
A: the eye deformation caused by myopia will make the vitreous in the eye degenerate early and produce all kinds of plankton. This is flying mosquito disease.
many people have seen that there are floating objects like mosquitoes or insects flying around in front of them. This phenomenon is flying mosquito disease.
so, how did the flying mosquito disease come from?
vitreous liquefaction and posterior detachment are the main causes.
the eyeball is like an egg, most of which is filled by the vitreous body; The vitreous body is like egg white, which is a transparent and viscous colloidal substance.
with age, glass will “liquefy”, just as eggs will go bad after being put for a long time. Part of the vitreous of
liquefy into water, causing other parts to become sticky: some colloidal fibers gather together. When the eyeball turns around, these fibers float around in the eyeball, looking like ants flying around. If vitreous liquefaction continues to develop, it will also lead to vitreous and retinal separation, leading to “posterior vitreous detachment” and “retinal detachment”. The former is only the aggravation of the condition of flying mosquitoes, while the latter is a very serious complication!
if there is no myopia, posterior vitreous detachment usually occurs at the age of 50 ~ 60 years; If there is myopia, some people will have flying ant disease at the age of 20 ~ 30. People with myopia are more likely to have floaters because myopia leads to the enlargement of the eyeball, and the vitreous filling the eyeball will appear less, which will lead to the early liquefaction of the vitreous.
when do you need to worry about the deterioration of flying mosquito disease?
if you appear: 1 The number of “flying mosquitoes” has increased sharply; 2. See the light and shadow of lightning (the glass is pulling the visual screen mold); 3. Sudden drop of vision… These conditions may be the precursor of retinal detachment. Be especially careful.
03 why are people with myopia prone to glaucoma?
A: the causes of glaucoma caused by high myopia are different. It is mainly eye swelling, pulling the optic nerve and causing damage to it. This is “normal intraocular pressure glaucoma”.
glaucoma is a common cause of blindness, which is usually related to “abnormal intraocular pressure”. Because glaucoma can steal your vision and vision silently before you find any abnormalities, it is called “the thief of vision”.
glaucoma caused by abnormal intraocular pressure
our eyes are like a water ball. There will be some water in and out of the eyeball at any time to achieve balance and surround the shape of the eyeball. This is the role of intraocular pressure. When our eyeballs are full of water and can not be discharged, the eyeballs will be very swollen and hard, and the intraocular pressure will rise abnormally, resulting in the death of retinal nerve cells and the damage of visual field.
normal tension glaucoma
the probability of glaucoma in people with high myopia is 7 times that in people without myopia and 3 times that in people with low myopia.
people with high myopia often have low intraocular pressure, but the optic nerve has the performance of glaucoma. It turns out that after the axis of myopia is elongated, the layer of optic nerve cells on the retina is pulled, and the compressive capacity is reduced. Although the intraocular pressure is normal, it has caused damage to this layer of fragile cells. What’s terrible is that these injuries can’t be recovered!
high myopia should be careful to prevent glaucoma
glaucoma caused by high myopia