black shadow in front of one eye
Introduction
Introduction Symptoms of punctate choroidal disease, the main complaints of a single eye, black eyes, flashing, dark spots, blurred vision and decreased vision. It can also be seen in diseases caused by diseases such as lens and vitreous.
Cause
Cause
(1) Causes of the disease
The cause is unclear.
(two) pathogenesis
The pathogenesis is still unclear. Some scholars have carried out tests on various pathogen antibodies, blood routines, serum angiotensin-converting enzymes, antinuclear antibodies, etc., and found no abnormalities. Therefore, it may be a myopia. Degenerative diseases caused. However, the patient presents with an inflammatory response, and it is difficult to explain the patient's clinical manifestations from a degenerative point of view. The disease may also be an autoimmune disease.
Examine
an examination
Related inspection
Eye and sacral area CT examination ophthalmologic examination eye function examination
Symptom
The patient mainly complained of monocular anterior shadow, flashing sensation, dark spots, blurred vision and decreased vision. The visual acuity decreased mostly (0.5 or more). Some patients may have severe visual loss (can be reduced to 0.04), no redness. , eye pain and other manifestations, without systemic diseases.
2. Signs
The typical change is multiple yellow and white round lesions on the bilateral fundus, 50-300 m in size, located in the retinal pigment epithelium and inner choroid, mainly concentrated in the posterior pole, and some lesions may be accompanied by serous retinal detachment. These lesions usually resolve after a few months, leaving a retinal pigment epithelial disorder, or atrophic chorioretinal scar, which later becomes a scar of a perforated edge.
The patient's anterior segment of the eye usually does not change, unlike many other types of inflammation involving the retinal pigment epithelium and choroid, which does not present intravitreal inflammatory cells.
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.
Diagnosis
Differential diagnosis
Differential diagnosis of monocular pre-eye shadow:
1. 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.
2, see things have small black spots: seen in floaters (Floaters). The patient will have black spots in front of the eyes, and will fly around as the eyeball rotates. It is like a flying mosquito, and its shape is round, elliptical, point-like, linear, and the like. It is often the case that when a patient looks at a brighter background such as a blue sky or a white wall, it is easier to find it.
3, a single eye suddenly appeared transient black Mongolian: some elderly people sometimes inexplicably one eye suddenly blind, after a minute or a few minutes, and some have repeated several times, some of them will be in the above situation A few days or months after the occurrence of hemiplegia, sudden limb movements, etc., even partiality. The above symptoms are also called monocular transient black in medicine, which refers to a sudden loss of vision in one eye.
4, black Mongolian: black Mongolian is the eye can not see or see the object when looking at the object, but the clinical symptoms of blackness in front of the eyes. Clinically, it occurs in the form of transient erythema, often due to transient cerebral ischemia, anemia, and hypotension.
