The eye is divided into three layers: the outermost layer of the eye – the fibrous membrane (including the cornea and sclera, harder, protective role), the middle layer of the eye, the uvea (containing a large number of pigments and blood vessels, nutritional role), and the retina (the innermost layer, the main function of light-sensitive, conductive vision). The retina has two layers, the inner is the light-sensitive layer and the outer is the pigment epithelium; there is a potential gap between the two, and retinal detachment mostly occurs in this way. Retinal detachment is divided into three types: pore-derived (primary), exudative, pulling, etc. Pore-derived: after the formation of a fissure on the retinal surface, the liquefied vitreous body enters the subretina through the fissure, which is common in medium and high myopia and is spherical. Vitreoretinopathy). Exudative: choroidal or retinal vascular extravasation accumulates in the subretina causing retinal detachment, mostly occurs in tumors, severe hypertension, hypertension in pregnancy, renal insufficiency, etc. It can appear as a change in retinal elevation with the change of body position, with a smooth surface without wrinkles and without fissures; Retractive: caused by vitreous fiber proliferation strips pulling. Mostly occurs in diabetic retinopathy caused by fiber membrane pulling, Eale, premature infant retinopathy, tent-like, if serious, may pull out the retinal fissure is called pulling – hole-derived retinal detachment also known as mixed retinal detachment. Treatment: Pore-derived retinal detachment needs to be treated surgically. The external approach (also known as conventional surgery, scleral buckling) is mainly to reset the retina after the retinal fissure is pressed outside the eye, while the internal approach (vitreous surgery) is to close the retinal fissure directly after vitrectomy with minimally invasive surgical instruments and inject gas and silicone oil into the vitreous cavity. The treatment of exudative retinal detachment is based on the treatment of the primary disease, and the treatment of retinal detachment by retraction requires vitreous surgery for the most part.