Each person more than once experienced a feeling called the appearance of "flies" in his eyes. Sometimes it may seem like evidence of some sinister eye disease. But nevertheless, in most cases, “flies” in the eyes appear for completely harmless reasons and are not a sign of pathology. However, it also happens when black “flies” in front of the eyes mean that peripheral vision has been impaired. And this is a problem ...
What are these strange signs formed by? Black “flies” in the eyes, small spots or dots appear when a person looks at a fuzzy background, for example, a blue sky or a plain wall. It is in such a situation that the smallest objects become visible, which, when the person’s head is turned or the eye moves, make inertia movement in the same direction, after which they smoothly go down and settle.
In completely healthy people, "flies" in the eyes may appear after a long sleep or in the dark - when the eyes get used to changing the brightness of the light. However, there are a number of cases where this symptom speaks of health problems that can lead to serious complications.
This includes osteochondrosis of the cervical spine, which is the most common cause of the appearance of "flies". This is due to the fact that with this disease, the blood flow in the vertebral arteries is disturbed , the pressure in them decreases. These blood vessels are known to supply blood and oxygen to the brain.
"Flies" in the eyes may appear with more dangerous acute pathologies, such as internal bleeding. In this case, white dots appear before the eyes, which can often be the only manifestation of such a dangerous syndrome. The cause may also be anemia, due to which the level of oxygen entering the brain decreases. Because of it, the metabolism is also disturbed, including in the retina. Anemia also leads to white spots in front of the eyes and impaired vision. Such "fad" also appear during a critical decrease in blood pressure, when the blood supply to the vessels is insufficient. White dots also appear with traumatic brain injuries.
In the case of acute poisoning, toxic substances can affect the nervous system, including such a part as the optic nerve. This pathology can lead not only to the appearance of "flies", but also to other visual disorders, for example, bifurcation in the eyes.
In the case of decompensated diabetes, deep damage to the vessels of the retina and brain occurs, which also leads to the appearance of "flies". Hypertensive crisis often leads to a similar lesion of blood vessels due to excessive stress. In this case, the exchange between the bloodstream and tissues is weakened. At the same time, the retina of the eye is one of the most sensitive tissues to circulatory disorders.
If the "flies" in the eyes appear in the second half of pregnancy. then this may indicate the presence of a disease such as eclampsia, which is dangerous for both the mother and the fetus.