Have you or your relatives and friends ever experienced such a situation: suddenly it was dark at the moment, even there was no sense of light at all, and then your eyesight slowly recovered after a while.
This may be [paroxysmal blackness].
In addition to the black at the moment, it may also be accompanied by headache, dizziness or foggy eyes, dark spots, etc., most of which occur in unilateral eyes.
What the hell is going on here? Is it a serious situation?
Is what paroxysmal black mask?
This situation indicates that there is a problem with the blood supply to the ocular artery.
The blood vessel suddenly spasms, or some small emboli block the blood vessel, making the blood flow blocked, the retina will be ischemic and anoxic, thus affecting the normal vision.
It shows that suddenly the eyes are black and the vision is not clear, but it can recover after a few seconds or minutes (blood vessels recover from spasm, or small emboli are washed away by blood flow to other places, and the blood flow is unobstructed again).
The blackened scene is a bit like the feeling that the curtain is slowly drawn or the curtain is slowly lowered.
Why is retina ischemic?
Many reasons will cause it.
For example, heart diseases, such as arrhythmia, coronary heart disease, rheumatic heart disease, etc. Carotid arteriosclerosis and stenosis, stroke, diabetes, etc., may also cause blackness.
There are also some diseases such as the local eye itself, which may also cause retinal ischemia.
Of course, postural hypotension can also cause this kind of situation, for example, after squatting for a long time and sitting for a long time, suddenly standing up, you will feel black at the moment.
Which groups should be careful?
The middle-aged and the elderly are high-risk groups.
Paroxysmal blackness is more common in people over 50 years old who are engaged in mental work, are under great mental pressure, and are accompanied by chronic diseases such as hypertension, diabetes, hyperlipidemia, coronary heart disease, etc., which need special attention.
With the acceleration of the life festival and the increase of the pressure of life, coupled with the long-term unhealthy lifestyle, the phenomenon of transient blackness among young people is also increasing.
Long hours of computer work or playing games, heavy smoking and drinking, emotional excitement and strenuous exercise may all be inducements.
Is the consequences of being black at the moment serious?
Transient blackness lasts for several seconds to several minutes, usually less than one hour, and vision can return to normal.
The frequency and duration of black mask attacks vary with the degree of the disease. Repeated spasms can also damage visual function.
It should also be stressed that one should not be careless in dealing with [the black at the moment]! It can be regarded as one of the important early warning signals for cardiovascular and cerebrovascular diseases.
Because the blood vessels in the eyes are branches of the internal carotid artery, they are very sensitive to carotid arteriosclerosis, stenosis and ischemia, and the risk of cardiovascular and cerebrovascular diseases is usually relatively high for people with recurrent attacks of blackness.
What should I do after the black cover?
First of all, you should keep calm, quickly hold the fixed objects around you, stand firm or sit down, avoid falling down, and then ask the people around you for help.
After the rest, go to the hospital in time and carry out the following relevant examinations under the guidance of the doctor.
包括Ophthalmic examination, 如视力、眼底血管造影等, 以及Vascular examination, 如经颅多普勒超声、颈动脉彩超等.医生还可能会建议检查Blood lipid, blood glucose, blood viscosity, electrocardiogram等.
According to the examination results, doctors will give corresponding treatment plans, and when necessary, they will carry out drug therapy and surgical treatment to protect visual function and prevent cerebrovascular accidents.
Should we pay attention to what at ordinary times?
Prevention is always the best choice.
Not only elderly friends, middle-aged people and even young people should also pay attention to protecting blood vessels from all aspects of life.
It is also simple to say, nothing more than the following five points:
- Actively control [three highs] resolutely quit smoking, low salt and low fat diet, fruits and vegetables to sufficient regular medication, don’t take medicine indiscriminately regular physical examination
However, it is not easy to do so. It is necessary to form such awareness and stick to it for a long time so as to form healthy and good habits.