First, a brief introduction to the vitreous humor. The vitreous body is colorless and transparent gel-like, located behind the lens, filled between the lens and the retina, filled with the cavity behind the lens, with the role of refraction and fixation of the retina.
A. What causes can cause vitreous clouding?
General inflammation, hemorrhage, trauma, intra-bulbar foreign body, high myopia and aging factors can make the vitreous liquefied, from the original gelatinous state into aqueous material, in which the collagen components condensation, floating, patients often feel a shadow floating in front of their eyes. The common cases are as follows: 1, vitreous liquefaction Various causes of hyaluronic acid depolymerization, vitreous from a gel state to a soluble state, is the vitreous metabolic disorders caused by the destruction of the balance of colloid. Liquefaction generally starts from the center of the vitreous, an optical space (liquefaction cavity) can appear, and later gradually expands, also from the fusion of several smaller liquefaction cavities into a larger liquefaction cavity. In addition to the clarified liquid, there are still translucent grayish-white silk bundle-like or flocculent floating materials swaying in the liquefaction cavity.
The vitreous detachment is the separation of vitreous cortex type II collagen and retinal inner membrane type IV collagen, but the posterior vitreodetachment (PVD) is the most common. In complete PVD, on the contrary, the vitreous cortex is extensively liquefied and vitreous collapse is seen in severe cases. On microscopic examination and slit lamp microscopy, the posterior vitreous interface appears as a broken floating cloud of flocculent, with a lumen filled with liquefied vitreous between it and the inner surface of the retina, and in most cases Weiss rings can be found. There is also a special form of PVD where there is a wide range of pathological adhesions between the posterior vitreous interface and the retina, and the thickened posterior cortical outer layer remains attached to the retina after vitreous detachment, which is actually an interlaminar separation of the vitreous and is called vitreous cleavage.
If there is vitreous cleavage, incomplete posterior detachment due to different degrees and different parts of pathological adhesions with the inner surface of the retina, it will leave hidden problems for the occurrence and development of retinal detachment, macular folds, macular cystoid edema, macular class fissure, proliferative diabetic retinopathy, etc., and become a trigger cause. Ms. Wang belongs to this case.
3, vitreous hemorrhage Due to trauma, spontaneous causes (inflammatory, degenerative or neoplastic diseases of the choroidal retina, etc.); diabetic patients; various surgeries such as cataract, intravitreal hemorrhage after retinal surgery.
4, vitreous inflammation Commonly seen in retina and uveitis. The clouding can be composed of inflammatory cells, exudate, necrotic tissue cells and free out of the pigment particles and phagocytes.
Second, if you find flying mosquitoes, flashing sensation and other vitreous turbidity symptoms what should you do?
You should go to the hospital to complete the following tests under the guidance of your doctor:1. Slit lamp examination to observe whether the anterior segment of the eye appears abnormal.2. Dilated pupil examination of the vitreous and fundus. Through the slit lamp anterior lens or direct (inter)-connected fundoscope, the vitreous is observed for inflammation, hemorrhage, liquefaction, and detachment. Focus on all parts of the retina, especially the periphery, for the presence of fissures, degenerative areas, vitreoretinal traction, hemorrhage and other abnormalities. 3. Ocular ultrasound. Visual inspection of vitreoretinal condition, focus on excluding retinal detachment and PVD. 4. OCT examination: to determine whether there is edema, traction and vitreous cleavage in the macula. 5. Fundus photography: to understand the retinal condition and laterally determine the lens and vitreous clouding through fundus photography.
Third, how to treat vitreous clouding it?
In principle, physiological miosis does not require treatment. Pathological clouding should be treated for the original disease. Inflammatory clouding is to control inflammation; post-detachment examination found retinal fissure, degeneration area available laser for closure and reinforcement; hemorrhagic such as fundus hemorrhage drug treatment; proliferative vitreous such as vitreous clouding is heavy, the course of the disease is long, there are fibrous proliferative changes can do vitrectomy when necessary.
In summary, vitreous clouding symptoms, or the need for timely consultation, dilated pupil examination fundus, to exclude vitreous-related diseases such as retinal detachment, vitreous hemorrhage and many other diseases.