Early glaucoma can be detected by going to the ophthalmology department for eye structure examination, visual field test, visual sensitivity test, intraocular pressure test, corneal thickness test and other tests. 1. Eye structure examination: including fundoscopy, OCT examination, slit lamp examination, anterior chamber angioscopy, etc., which is helpful to make a diagnosis of whether there is early glaucoma. 2. Visual field test: in the early stage of glaucoma, patients may have symptoms such as narrowing of visual field, and visual field test is helpful to determine whether there is glaucoma. 3. Visual sensitivity test: Through this test, it can clarify whether the patient has reduced vision and determine the degree of vision reduction. 4. Intraocular pressure test: Glaucoma patients usually have increased intraocular pressure, which can be diagnosed through intraocular pressure test. 5. Corneal thickness test: The corneal thickness will change in the early stage of glaucoma, and the corneal thickness test is helpful for diagnosis. If you find the symptoms of glaucoma, consult the doctor promptly for relevant examination and active treatment.