The disadvantages of cataract surgery for high myopia include the possibility of intraoperative hemorrhage, posterior capsular rupture, and retinal tears. 1. Intraoperative hemorrhage: The length of the eyeball increases in patients with high myopia, thinning the retina and choroid, which may lead to hemorrhage due to blood vessel rupture during cataract surgery. 2. Rupture of the posterior capsule: The eye axis of patients with high myopia will be elongated, which may lead to rupture of the posterior capsule after cataract surgery. 3. Retinal tear: The retina of patients with high myopia is generally much thinner than that of normal people, and after surgery, due to changes in the intraocular environment of the patient, it may cause retinal tear. It is recommended that patients go to the ophthalmology department of regular hospitals to improve the relevant examinations and choose the appropriate treatment method under the guidance of doctors.