Sudden amaurosis in one eye
Introduction
Introduction Some elderly people sometimes inexplicably blindly blink one eye, and after a minute or a few minutes, some of them are repeated several times. Some of them will also have numbness in a few days or months after the above situation occurs. The phenomenon of sudden movement of the limbs is not even partial. The above symptoms are also known in medicine as monocular transient blackness, which refers to a sudden loss of vision in one eye.
Cause
Cause
Monocular transient melanotype is a type of ischemic retinopathy.
The blood supply to the retina is mainly from the central retinal artery. The latter is the aorta that supplies blood to the brain. Since the central retinal artery is the terminal artery, when the vasospasm occurs under certain incentives, or the thrombus is blocked, the retina develops acute ischemia, and the patient will experience the above-mentioned transient black.
If the vasospasm persists or the embolus cannot be removed, and retinal blood perfusion cannot be restored in time, it may cause serious consequences such as blindness of the eye.
Examine
an examination
Related inspection
Fundus microvascular examination, brain CT examination, blood routine
Need to check blood lipids, blood sugar, blood routine, fundus blood vessels, brain CT and other conditions to clear.
Diagnosis
Differential diagnosis
1. Acute optic discitis: The incidence is very urgent, the visual impairment is serious, and many patients can only see manual or even no light. The visual field examination has a large central dark spot and a narrowing of the surrounding visual field. The degree of optic disc edema is not high, but at the same time there is more obvious hyperemia, and the late optic nerve is secondary atrophy. Ischemic optic neuropathy, visual acuity is not serious, although the optic disc has edema, but congestion is not obvious, there is a typical visual field change, the late optic nerve is a primary atrophy.
2. Optic disc edema of intracranial space-occupying lesions: multiple eyes and eyes occur simultaneously, the degree of optic disc edema is high, the optic disc is congested obviously, the vein is thick, distorted, bleeding, normal vision, the visual field only expands the physiological blind spot, and there is a history of obvious headache and vomiting. And there are other signs of nervous system damage.
3. Foster-Kennedy syndrome: manifested as a primary optic nerve atrophy, and another optic disc edema. The clinical significance is that there is a lesion under the frontal lobe near the cranial fossa on the optic atrophy side, which directly oppresses the lateral optic nerve, and atrophy occurs. At the same time, optic disc edema occurs on the contralateral side due to increased intracranial pressure. The difference between it and ischemic optic neuropathy is that the former has many symptoms and signs of increased intracranial pressure, such as headache, vomiting and other signs of nervous system damage, and the degree of optic disc edema is heavier, hyperemia is obvious, retinal varices. Visual field examination, the physiological blind spot on the edema side expanded, and the central side was dark on the atrophic side. The visual field changes of ischemic optic neuropathy are different, and there is no increase in intracranial pressure and signs of nervous system. It is not difficult to distinguish carefully.
