black shadow
Introduction
Introduction The main symptom of vitreous opacity is that there are dark shadows in front of the eyes, and the shape is different. Due to the aggregation of solid components, or the intrusion of blood and other formed components, the transparency of the vitreous body changes, and the opaque body appears at this moment. Filamentous black shadows flutter. The effect on vision varies depending on the location and extent of opacity. A variety of eye diseases can cause vitreous opacity, the most common are senile degeneration, myopia changes, posterior vitreous detachment and physiological floaters, in addition to retinal detachment, uveitis, primary familial amyloidosis, etc. Black shadow in front of you.
Cause
Cause
The cause of the shadow in front of the eyes:
A variety of eye diseases can cause vitreous opacity, the most common are senile degeneration, myopia changes, posterior vitreous detachment and physiological floaters, in addition to retinal detachment, uveitis, primary familial amyloidosis, vitreous vitreous Liquefaction, etc. can also occur in the clinical manifestations of the front of the shadow.
Examine
an examination
Related inspection
Ophthalmologic examination ophthalmoscopy
Check and diagnose the front of the shadow:
In the pathological condition, the vitreous gel state is destroyed and becomes a liquid. This condition is medically referred to as vitreous liquefaction, a degeneration process of the vitreous. Hyaluronic acid depolymerizes due to metabolism and photochemical action, collagen fiber scaffold collapses and concentrates, and water is analyzed. At the same time, due to the aggregation of solid components, or the intrusion of blood and other constituents, the transparency of the vitreous body changes, and an opaque body appears, which is called vitreous opacity. At this time, you will see a bit of a shape or a silky black shadow in front of your eyes.
Diagnosis
Differential diagnosis
Symptoms of confusing eyes in front of the eyes:
Monocular in front of the eye: Symptoms of choroidal choroidal disease, the patient mainly complained of monocular anterior shadow, flashing, dark spots, blurred vision and decreased vision. The diagnosis of this disease is mainly based on typical fundus changes, such as scattered multiple yellow and white round lesions under the retina, no anterior segment and vitreous inflammatory response. Fluorescein fundus angiography and indocyanine green angiography are helpful for diagnosis.
Black in front of us: When we suddenly stand up from the position, we will feel black in front of us, and Venus will be mad. Some people will feel as if they have anemia. In fact, this is a normal physiological response caused by a sudden change in the body position causing hypotension. In addition, when people are subjected to sudden emotional blows and extreme hunger, they may also appear black. These problems are not very big, the terrible thing is that the eyes are black with other corresponding symptoms.
Abnormal flash in front of eyes, increased black spots: pathological floaters are generally caused by serious diseases, which are caused by changes in the structure of the omentum, optic nerve, ciliary body and other structures near the vitreous. Pathological floaters have three characteristics: 1. There is an abnormal flash. 2. The number of flying mosquitoes is increasing in a short time. 3. The line of sight has a feeling of being blocked.
Pathological floaters are generally caused by serious diseases, which are caused by changes in the structure of the omentum, optic nerve, ciliary body and other structures near the vitreous.
Sparks or flashes in front of the eyes: a clinical diagnosis of iliac arteritis. Temporal arteritis, also known as cranial arteritis, is named after the anatomy. It is a kind of inflammation of the large and middle arteries, which can involve arteries in multiple sites, but all have radial artery damage. Clinically it is characterized by headache, fever, eye pain, generalized pain and progressive visual impairment or even blindness. The disease is closely related to rheumatic polymyalgia.
In the pathological condition, the vitreous gel state is destroyed and becomes a liquid. This condition is medically referred to as vitreous liquefaction, a degeneration process of the vitreous. Hyaluronic acid depolymerizes due to metabolism and photochemical action, collagen fiber scaffold collapses and concentrates, and water is analyzed. At the same time, due to the aggregation of solid components, or the intrusion of blood and other constituents, the transparency of the vitreous body changes, and an opaque body appears, which is called vitreous opacity. At this time, you will see a bit of a shape or a silky black shadow in front of your eyes.
