three-way mirror

Three-sided mirror, it is easy to identify the difference between the optic nerve head, retina, choroid, the identification of cysts, hemangioma, retinal tears, choroidal tumors, and the relationship between the retinal surface and the posterior vitreous membrane, serous and retinal detachment between the retina and the choroid The observations below it are very helpful. Basic Information Specialist Category: Ophthalmic Examination Category: Applicable gender: whether men and women apply fasting: not fasting Tips: Please cooperate with the doctor when checking. Normal value In the central part, the mirror 2 can see the part between the equator and the base of the eye 30 °, the mirror 3 can see the surrounding part, and the mirror 4 can see the vitreous and the peripheral part of the fundus and the anterior chamber angle. It should be fully dilated before using the three-sided mirror. When the pupil is larger than 8mm, the serrated edge and surrounding area can be easily observed. Clinical significance Abnormal results vary the height of the optic nerve, the retina, the choroid, and the cysts, hemangiomas, retinal tears, choroidal tumors, etc. Elderly people who need to be examined for health care, retinal examination of the fundus. Precautions Pre-inspection contraindications: There are other diseases that are allergic to mydriatics. Requirements for inspection: should be fully diverted. Inspection process Before the examination, it should be fully dilated. First, the surface anesthetic is dripped. The concave surface of the cornea is contacted with methyl cellulose, and then placed in the conjunctival sac, so that the concave surface is close to the cornea, and then the light is projected at a small angle (but not zero). Irradiation, three-mirror mirrors were used to observe the fundus. The three mirror angles are 75°, 67° and 59° respectively. The mirror 1 can see the central part of the fundus. The mirror 2 can see the part between the equator and the bottom of the eye. The mirror 3 can see the surrounding part. 4 can see the vitreous and the peripheral part of the fundus and anterior chamber angle. Not suitable for the crowd Inappropriate crowd: closed angle glaucoma.