How should blue visual field defects be differentially diagnosed from other diseases?

Blue visual field defects occur when the tissues in the eye that control the color blue become abnormal. Visual field defects are a common symptom of many neurological disorders, and can be caused by damage to different parts of the visual pathway and by different diseases. How should blue visual field defects be differentially diagnosed from other diseases? Blue visual field defects are characterized by difficulty reading and seeing objects (missing words, letters or parts of objects), photophobia, blurred distance vision, areas of the central or peripheral visual field that disappear or become dark, flashes of light and crossed lines. When looking at matters, the visual field is incomplete, as if there is some shadow blocking the vision, or sometimes a corner is completely black and you cannot see anything. Glaucoma is one of the main causes of visual field defects. The most distinctive feature of glaucoma visual field defect is the tubular visual field, which means that the visual field shrinks a little from the periphery and finally becomes like a tube. The presence of tubular vision already indicates that glaucoma is very serious, and the visual field defect of glaucoma is irreversible. It can only be maintained as is. White visual field defect: The retina is separated from its own pigment epithelium. It is characterized by a greenish-blue corrugated spherical bulge in the fundus, dark red blood vessels that undulate with the corrugations and round red fissures, and a white visual field defect. It is a serious eye disease mostly seen in highly myopic and elderly patients, more men than women. Early and timely treatment can control its development, but once the retina detaches, the visual acuity drops dramatically, and it belongs to the category of “violent blindness” in Chinese medicine.