Primary open-angle glaucoma prevalence rate of over 30 years of age to 0.57 percent, while the increase in the incidence increased with age, but it can be 20 to 30 years old, even 10-year-old morbidity. Primary open-angle glaucoma is a hereditary and familial disease, the precise genetic methods is not clear, may be the most multi-gene genetic factors. It has a close family in a higher rate of incidence of about 5% to 19%, while those who have a family history of the incidence rate was as high as 50%. People are susceptible to any of the following open-angle glaucoma:
① ocular hypertension. This is the first risk factor, although not early glaucoma damage, with the duration of the extension of high intraocular pressure, increasing the value of intraocular pressure Rongji, the occurrence of glaucoma and harm may be gradually increased.
② Xianao optic nerve head. This is the second risk factors, large and deep Xianao pressure on the tolerance of difference. Xianao bilateral asymmetry is generally caused by the day after tomorrow, and with high intraocular pressure, Xianao progressive expansion is the most important risk factors that may occur in the visual field defect ago. Such people need to regularly check optic disc and Xianao vision, in the event of negative treatment of optic nerve damage.
③ high myopia. Patients with high myopia in open-angle glaucoma increased incidence of the same open-angle glaucoma in the high incidence of myopia. Susceptible to the myopia intraocular pressure, because Xianao have a shallow and difficult to identify, because of low hardness sclera, sag tonometer intraocular pressure measurement value often on the low side.
④ diabetes. The incidence of diabetes in patients with glaucoma rate of 12.6 percent, significantly higher than the normal population.
⑤ systemic disease. Especially in patients with low blood pressure, prone to insufficiency of the optic disc and increase the risk of damage to the optic nerve.
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