Iris segmental atrophy is the result of a certain state of high intraocular pressure that impairs blood supply to the iris artery, causing ischemic segmental or fan-shaped atrophy consistent with the shape of the distribution of the iris artery. Iris segmental atrophy is a clinical manifestation of acute congestive glaucoma in remission. What are the tests for acute congestive glaucoma? 1. Intraocular pressure The normal value is 10-21 mm Hg. Currently, non-contact tonometer is mostly used, which is not invasive. It can be used as a diagnostic tool and as an indicator of efficacy evaluation. 2.Fundus The main examination is C/D, the normal value is not more than 0.3. 3.Field of vision At present, automatic visual field meter is mostly used, which is not traumatic. It can be used as a diagnostic tool and as an indicator of disease progression. 4.Atrial angle Anterior atrial angle microscopy can be used, and ultrasound biomicroscopy (UBM) can also be used. Alternatively, anterior segment optical coherence tomography can be used without trauma. Atrial angle examination is the main tool to identify the type of glaucoma. 5. Retinal nerve fiber layer thickness is an important tool for early diagnosis, disease assessment, and monitoring of glaucoma. Examination equipment includes: retinal thickness analyzer, optical coherence tomography (OCT), etc.