Laser fundus tissue coagulation

Treating diseases: cataracts Indication 1. Special laser treatment for ophthalmic diseases: retinal tears and cleft palate, retinal choroidal hemangioma, central serous retinal choroidal lesion, retinal vein inflammation, retinal vein branch and central venous obstruction, diabetic retinopathy. 2, laser iridotomy treatment: 1 light path obstructive eye disease: corneal leukoplakia, L membrane closure, pupillary displacement. 2 glaucoma: primary or preclinical stage of primary angle-closure glaucoma, acute or subacute angle-closure glaucoma remission, secondary glaucoma iris bulging, incomplete iris resection, aphakic pupillary glaucoma. 3, laser trabeculoplasty for the treatment of glaucoma drug treatment of primary open angle glaucoma, traumatic angle retrograde glaucoma, pigmented glaucoma, aphakic glaucoma, anterior chamber without vitreous, intraocular lens open angle glaucoma, Glaucoma that cannot tolerate routine surgery. 4, laser lens capsule incision for extracapsular cataract extraction, posterior capsule opacification after intraocular lens implantation, traumatic cataract partial absorption of membranous cataract, combined with traumatic cataract or congenital cataract surgery preoperative treatment Wait. 5, laser flexion keratotomy for myopia correction for -5, 0D or lower degrees of myopia correction is better. 6, laser coagulation for corneal and conjunctival lesions corneal neovascularization, conjunctival neovascularization, hemangioma and pigmentation. Preoperative preparation Preoperative examination: 1 Retinal detachment with a hole, should check the location, shape, number of the hole and the vicinity of the omentum. The macular hole should be examined for distance, near vision (refraction if necessary), macular gaze function, color tone of the slit hole under the slit lamp and dislocation of the optical tangent. 2 retinal vasculopathy and its changes, should be described in detail and graphically indicated, should be performed under the fundus fluorescein angiography. Fundus photography was performed before and after surgery. Surgical procedure 1. Fully dilated with 5%-10% phenylephrine and 2% post-mato product, 1% tetracaine for topical anesthesia, and placed contact lens. 2, laser operation: 1 commonly used argon ion laser and helium ion laser. 2 Check the output power or energy after starting up according to the operating procedures. 3 Adjust the required power, exposure time and spot size according to the nature and location of the lesion. 4 See the area to be irradiated and aim to trigger the irradiation. 3, fundus vascular abnormal treatment: 1 retinal, choroidal hemangioma: direct coagulation of the tumor, with gray or yellow-white coagulated plaque is preferred, the extent of the lesion should be divided into treatment, interval 1-3 weeks is appropriate. 2 retinal vein inflammation: for the retinal area with neovascularization, gray anoxic, no irrigation area or fluorescence leakage for photocoagulation. For the proliferating blood vessels that extend into the vitreous, the roots of the blood vessels are coagulated and photocoagulated by the omentum. complication The cornea is turbid, and the anterior chamber pigment particles, tissue debris, and iris hemorrhage can absorb themselves. Anterior chamber pigmented opacity requires oral indomethacin and corticosteroids. Temporary elevated intraocular pressure can be treated with indomethacin, corticosteroids and antihypertensive drugs. Retinal hemorrhage should be treated by conventional hemostasis or by laser irradiation of clots to promote absorption.