Abstract: the axial elongation of myopia leads to poor blood supply and retinal ischemia. In order to ensure the blood supply, neovascularization will occur. These neovascularization walls are very thin and easy to rupture and bleed. Macular hemorrhage will be formed after bleeding.
1. Flying mosquito disease
flying mosquito disease is mainly due to the liquefaction of the normal colloidal structure of the vitreous caused by myopia. The patient consciously has a dark shadow floating in front of his eyes and will move with the rotation of his eyes.
2 Strabismus amblyopia
myopia patients are prone to exotropia. If myopia is not corrected for a long time, exotropia will further develop into exotropia. If the binocular myopia degree difference exceeds 2.50d (often said 250 degrees) and is not corrected, it will lead to anisometropic amblyopia.
3. Posterior scleral staphyloma
most myopia is the elongation of the ocular axis and the obvious thinning of the sclera at the posterior pole. Under the action of intraocular pressure, the sclera protrudes and forms posterior scleral grapes of different sizes. Staphyloma can deepen myopia and affect visual function.
4. Macular hemorrhage and degeneration
myopia have elongated eye axis, resulting in poor blood supply and retinal ischemia. In order to ensure blood supply, neovascularization will be generated. These neovascularization tube walls are very thin and easy to rupture and bleed, and macular hemorrhage will be formed after bleeding. After the bleeding is absorbed, the new blood vessels can rupture and bleed again. After multiple bleeding, local scars will form, causing macular degeneration, which will permanently damage vision.
5. Retinal holes and retinal detachment
retinal holes mostly occur in the macula, the equator or periphery of the fundus, and are mostly horseshoe shaped or circular holes. After the hole, the contact area between retina and sclera is small and the stability is poor. On this basis, it further develops into retinal detachment. According to statistics, more than 80% of retinal detachment is accompanied by myopia. If it is not treated in time (surgery or laser), it can cause irreversible permanent blindness.