Abstract: pathological myopia is a kind of high myopia, which does serious harm to visual function. Diopter over 1000 degrees, up to 3000 degrees. It is an eye disease characterized by progressive deepening of diopter, continuous growth of ocular axis, progressive damage to ocular contents and retinal choroid tissue, resulting in visual dysfunction. The prevalence rate is 1% ~ 12%.
many myopia friends are very concerned: will adult myopia deepen? This problem varies from person to person. Generally speaking, with the growth of age and the reduction of long-term eye use time, the vision will tend to be stable and the degree of glasses will not increase. However, some diseases can also deepen myopia, which is worthy of attention.
although with the increase of age, the intensity of eye use decreases and the visual acuity tends to be stable. However, five diseases such as pseudomyopia, glaucoma and cataract may still hurt the eyes and deepen myopia. Let’s take a look at the five diseases that lead to the deepening of myopia and pay attention to prevention.
1. Visual fatigue
● symptoms of visual fatigue
at present, more and more people suffer from “visual fatigue”, which is the manifestation of the change of modern lifestyle. Long time close reading, reading too small words, long computer operation time, etc. will overuse the eye adjustment ability, causing visual fatigue symptoms such as eye swelling and pain, dry hair, blurred vision, heavy eyelids, and even headache, orbital pain, and even nausea and vomiting.
● how does visual fatigue lead to myopia or deepen myopia?
close eye use and high-intensity eye use can cause visual fatigue. If you are in a state of fatigue for a long time and can not be relieved and adjusted, it is easy to lead to ciliary muscle spasm. The continuous contraction time of ciliary muscle is too long, so that the eyes are in a state of fatigue for a long time, and regulatory myopia, namely pseudomyopia, will occur. For regulatory myopia, if it is not treated early, it will become true myopia, so we must pay attention to it.
2. Pathological myopia
● manifestations of pathological myopia: pathological myopia is one of high myopia, which does serious harm to visual function. Diopter over 1000 degrees, up to 3000 degrees. It is an eye disease characterized by progressive deepening of diopter, continuous growth of ocular axis, progressive damage to ocular contents and retinal choroid tissue, resulting in visual dysfunction. The prevalence rate is 1% ~ 12%. Pathological myopia of
occurs earlier (it can occur between 5 and 10 years old) and progresses rapidly. It continues to develop after the age of 25. The degree of myopia can reach more than -15.00d. It is often accompanied by fundus changes and vision is not easy to correct. It is also called degenerative myopia.
● etiology: it is mainly caused by genetic factors. Therefore, although some people are not engaged in the work of close vision, they will still get sick, and serious complications such as retinal degenerative hole, retinal detachment and macular hemorrhage can occur.
3, and how diabetes causes myopia
. When the blood sugar level of diabetics increases to a certain extent, the sugar content in the eyeball will also increase, causing the aqueous humor osmotic pressure to decrease in the eyes. The lens may be in a relative “hypertonic” state due to the increase of glucose content, causing edema, resulting in increased refractive power and producing myopia symptoms.
can cause myopia suddenly, or the old presbyopic symptoms can be alleviated. The degree of myopia caused by diabetes is often unstable. When the diabetes is effectively treated and the blood sugar is controlled at a normal level for a period of time, the myopia symptoms will gradually reduce to disappear, and the patients can be restored to normal vision.
4. How does cataract lead to myopia or deepen myopia
cataract is that the originally transparent eye lens gradually changes into yellowish brown, and the refractive coefficient increases due to the increase of lens density, so the refractive ability of the lens is enhanced, just like the sudden increase of magnification, which leads to the continuous increase of myopia, Vision is getting worse and worse.
for myopia friends, there may also be an increase in the degree of myopia during the formation of senile cataract. For friends with high myopia, if they find that their glasses suddenly deepen or their old flowers suddenly reduce at the age of 50, it is likely to be a manifestation of cataract and they must see a doctor as soon as possible.
for friends without myopia, because the occurrence of senile cataract does not need to read with the help of presbyopia glasses, and the degree of presbyopia is improved, just like rejuvenation. Some people jokingly call this phenomenon “the second spring of vision”.
5. How does glaucoma lead to myopia or deepen myopia
when talking about glaucoma, many people often “talk about cyanosis”. Because glaucoma is an eye disease that seriously threatens vision and visual function, it is mainly related to the increase of intraocular pressure after the block of “aqueous humor” circulation. If effective treatment measures are not taken, high intraocular pressure will compress the optic nerve, resulting in the gradual atrophy of the optic nerve, and the visual field will be gradually lost or even blind.
study found that the prevalence of primary open-angle glaucoma in high myopia was significantly higher than that in emmetropia and mild myopia, and the higher the degree of myopia, the more likely it was to be complicated with primary open-angle glaucoma. High myopia above 600 degrees is a significant risk factor for glaucoma optic neuropathy. At the same time, high myopia combined with primary open-angle glaucoma causes elevated intraocular pressure, which is easy to further prolong the anterior and posterior diameter of the ocular axis and gradually deepen the degree of myopia.
are here to remind the majority of friends with high myopia that they should not ignore the examination of intraocular pressure, fundus optic nerve and visual field. Early examination and early diagnosis can prevent the trouble.
at present, myopia is listed as one of the three major diseases in the world. Adult myopia patients should maintain a good work and life style, pay attention to eye hygiene, conduct regular physical examination every year, find relevant diseases as soon as possible and treat them in time. For eye discomfort, go to a regular hospital to find an ophthalmologist for diagnosis and treatment in time, and find and treat it as early as possible.