Causes of vision loss

What is the cause of decreased vision? Many people are not very clear about this problem. Many people do not know why their vision suddenly begins to deteriorate. Therefore, when such a problem occurs, you must pay attention to it. Under normal circumstances, there will be no such problem unless there are some problems with the body. Therefore, at this time, timely treatment is needed to improve the disease.

So what are the reasons for decreased vision? The following is a detailed introduction so that you can have a good understanding of this problem. When such a problem occurs, you will also know how to deal with it so that the problem can be improved.

Causes of vision loss:

Causes of sudden vision loss: 1. Acute angle-closure glaucoma: more common in people over 50 years old, more common in women, severe cases can lead to blindness in a short period of time. It has a tendency to run in families, and anger, excessive fatigue, sudden climate changes, etc. are common triggering factors. In addition to sudden vision loss, this condition is also accompanied by eye pain, headache, nausea, vomiting, and the perception of colored rings around incandescent light bulbs when looking at them.

Reason 2 for sudden decrease in vision: Central retinal artery embolism: Many elderly people have problems with atherosclerosis. If the atherosclerotic plaques on the inner wall of the artery fall off, it will lead to central retinal artery embolism, retinal ischemia and necrosis, resulting in loss of visual function. The typical feature of this disease is the sudden and painless complete blindness of one eye. Some patients also experience paroxysmal and transient black spots before the attack. It is more common in elderly people with existing hypertension, arteriosclerosis and heart failure. If not treated in time, it may cause complete blindness due to necrosis of retinal tissue.

Cause of sudden decrease in vision 3. Vitreous hemorrhage: It often occurs in elderly people with existing hypertension and diabetes, and may also occur in some patients with retinal vascular diseases. Bleeding usually comes from new blood vessels or damaged blood vessels in the fundus. Blood enters the vitreous cavity and blocks light from entering the eye, which can cause decreased vision. When the blood accumulation is small, in addition to blurred vision, there are also dark shadows floating in front of the eyes; when the blood accumulation is large, the vision decreases sharply and only light perception remains.

4. Optic disc ischemia: Due to the hardening of the blood vessels supplying nutrients to the optic disc, the optic nerve in the corresponding blood supply area is ischemic and the optic disc degenerates, resulting in sudden blurred vision, accompanied by a fixed blind spot in front of the eyes, that is, loss of visual field.

Reasons for sudden decrease in vision 5. Retinal detachment: more common in middle-aged and elderly people, most of whom have myopia, and some people suffer from the disease in both eyes at the same time. Age, genetics, trauma, etc. are all predisposing factors. When the retina is completely detached, it can cause a sudden loss of vision.

Causes of sudden vision loss 6. Diabetic retinopathy: This is a common ophthalmic complication in diabetic patients and one of the main causes of eye blindness. The longer the diabetes lasts, the more severe the retinopathy will be.

Through the above introduction, we have some understanding of the causes of decreased vision. If it is the above reasons, timely treatment is needed, otherwise it will cause great harm to the eyes, especially when there is retinal disease, which will cause great damage to the eyes, so timely treatment is also needed to avoid other problems.