paint crack pattern
Introduction
Introduction Lacquer crack: A common change in the posterior pole of degenerative myopia. Yellow-white or white stripes are still visible in the macula or posterior pole, which are in the form of a mesh or a branch, which is similar to the crack on the lacquer.
Cause
Cause
The lacquer cracks may be caused by rupture of the Bruch membrane and atrophy of the pigment epithelium. The mechanism may be related to genetic factors, and may be related to biomechanical abnormalities such as axial lengthening, elevated intraocular pressure, intraocular layer deformation and traction and tearing of Bruch membrane, and is associated with blood circulation disorders and age. It is caused by damage to the pigment epithelial layer-Bruch membrane capillary layer. The lacquer cracks rarely directly impair the function, but can cause visual distortion and relative dark spots. When the lacquer ruptures, the subretinal neovascularization can occur, causing macular hemorrhage, forming Fuchs plaque, which is further impaired vision. Aura of the. The paint crack eventually induces further atrophy and degeneration of the choroid and retina. The actual incidence of Avila paint cracks may be higher, as some may have merged with the deep choroidal atrophy.
Examine
an examination
Related inspection
Eye and sacral area CT examination ophthalmoscopy
Through fluorescein angiography and three-sided mirror observation, the lacquer cracks are small, irregular, sometimes intermittently pale yellow lines or grain-like, sometimes branched, located in the deepest part of the retina. Large or medium-sized choroidal blood vessels are often found across the bottom, seen in and around the macula, and may be associated with choroidal hemorrhage.
Diagnosis
Differential diagnosis
It is manifested that the retinal pigment epithelial cells decrease the phagocytosis and digestive function of the outer disc membrane of the visual cells, so that the undigested disc membrane remains in the basal cell original paddle and is discharged to the outside of the cell to form a drusen, thus secondary Pathological changes lead to membrane rupture and atrophy of pigment epithelium, which is mainly related to long-term chronic photodamage, choroidal vascular sclerosis and retinal pigment epithelial cell aging.
