See things double

Introduction There are many reasons for diplopia, which is mainly caused by weakness or paralysis of the outer eye muscles of the eyes, while the outer eye muscles are controlled by the cranial nerves, so the diseases of the cranial nerves or the brain itself may cause diplopia. The principle of diplopia is that the image of one eye falls on the small concave of the macula, while the image of the other eye does not fall on the small concave. The image that falls on the small concave is always clearer than the image that does not fall on the small concave, thus forming two images. It is the phenomenon that an object is regarded as two objects that leave, and the clinical can be divided into two types: single eye double vision and double eye double vision, while the elderly's double vision is more common in both eyes.

Cause

The most common ocular dyskinesia caused by vascular diseases, the elderly are susceptible to atherosclerosis, hypertension, diabetes and other vascular diseases, if on this basis, vascular stenosis, thrombosis, bleeding and blood supply Obstacles often cause double vision. Once the blood supply to the brain stem is impaired, it will lead to abnormal cranial nerve function and clinical ophthalmoplegia diplopia.

an examination

Related inspection

Direct ophthalmoscopy

Diagnosis can be based on clinical symptoms. For elderly patients with double vision, in addition to routine eye examinations, a comprehensive and detailed systemic examination should be performed.

The main symptom is that an object is seen as two objects. However, some patients do not describe true double vision, but instead complain that vision is blurred or that it is difficult to see things in a particular direction. Some patients may have symptoms such as dizziness, headache, nausea, and hoe.

Differential diagnosis

Look at the differential diagnosis of things with ghosting:

Monocular double vision: refers to the situation of double vision when monocular vision, which is mainly the problem of the eye itself, such as corneal irregular astigmatism, cataract, macular lesions and so on.

Double-eye double-view: It is a double-shadow when both eyes are viewed at the same time, but the double-vision disappears after covering one eye. This is mainly caused by abnormal nerve or muscle that controls eye movement. If women pay special attention to whether there is abnormal thyroid function or diabetes, men should pay attention to whether it is the third or fourth pair of cranial nerve palsy caused by diabetes. In addition, the tumor may also cause double vision.

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