small eyeball
Introduction
Introduction It can be seen in congenital microphthalmia (CMIC), which is a congenital abnormal ophthalmic disease. The main manifestation is that the anteroposterior diameter of the eyeball is smaller than the normal range, the cleft palate is narrow, the eyelid is small, and the eyeball is deeply trapped in the eyelid. Patients often have poor eyesight and are difficult to treat.
Cause
Cause
Can be seen in congenital small eyeballs, the disease is mostly scattered cases, there are also family genetic reports, genetic methods are autosomal dominant (AD), autosomal recessive (AR) and X-linked recessive X-linked recessive (XR). Current research suggests that the genes or sites associated with congenital small eyeballs are: MITF, SOX2, PAX6, MCOP, and NNO2.
Examine
an examination
Related inspection
Ultrasound examination of the eyeball and eyelids for ophthalmoscopy and CT examination of the eye
There are many types of congenital small eyeballs: only the small volume of the eyeball, not accompanied by other abnormalities, called simple small eyeballs, less common; most congenital small eyeballs accompanied by other deformities of the eye, such as anterior hypoplasia , congenital cataract, chorioretinal defects, retinal dysplasia, optic nerve defects. The most serious type is congenital without eyeballs.
Diagnosis
Differential diagnosis
Should be differentiated from eyeball invagination diagnosis: eyeball position receding is called eyeball invagination. It is the opposite of the eyeball, which is less common than the eyeball. Eyeball invagination refers to the eyeball invagination caused by reasons other than the eyeball. It must be differentiated from the eyeballs that reduce the lesions (small eyeballs, eyeball atrophy, eyeball spasm) and the collapse of the eyeball position caused by the reduction of the cleft palate. Open.
