Iris defect

Introduction If the choroidal fissure is not completely closed at the iris, the defect under the iris is caused, causing the circular pupil to be a keyhole, called the iris defect. Such malformations can extend to the ciliary body, retina, and optic nerve, often with limited other abnormalities. Iris defects are divided into two types: typical and simple. A typical iris defect is a complete iris defect located below, forming a pear-shaped pupil with a pointed tip that differs from the surgically removed person in that it is covered by the defect edge and pigmented epithelium, often accompanied by other congenital malformations of the eye, such as eyelashes. Body and choroidal defects, etc. Simple iris defect is the iris defect without other uveal abnormalities, which is characterized by the incision of the pupil margin, the iris hole, the iris peripheral defect, the iris matrix and the pigment epithelial defect, etc., which does not affect the visual acuity.

Cause

Iris defects are divided into two types: typical and simple. A typical iris defect is a complete iris defect located below, forming a pear-shaped pupil with a pointed tip that differs from the surgically removed person in that it is covered by the defect edge and pigmented epithelium, often accompanied by other congenital malformations of the eye, such as eyelashes. Body and choroidal defects, etc. Simple iris defect is an iris defect without other uveal abnormalities, which is characterized by the incision of the pupil margin, the iris hole, the iris peripheral defect, the iris matrix and the pigment epithelial defect, etc., which does not affect the visual acuity.

It is related to the incomplete closure of the embryo in the early development of the embryonic eye. Congenital iris choroidal defect is a type of congenital partial defect of the eyeball. The defect is located in the lower part of the typical defect, which is caused by the disorder during the process of embryonic fissure closure.

an examination

Related inspection

Fundus examination

Iris defects are divided into two types: typical and simple. A typical iris defect is a complete iris defect located below, forming a pear-shaped pupil with a pointed tip that differs from the surgically removed person in that it is covered by the defect edge and pigmented epithelium, often accompanied by other congenital malformations of the eye, such as eyelashes. Body and choroidal defects, etc. Simple iris defect is the iris defect without other uveal abnormalities, which is characterized by the incision of the pupil margin, the iris hole, the iris peripheral defect, the iris matrix and the pigment epithelial defect, etc., which does not affect the visual acuity.

Congenital iris choroidal defect is a type of congenital partial defect of the eyeball. The defect is located in the lower part of the typical defect, which is caused by the disorder during the process of embryonic fissure closure. The specific situation is also based on clinical diagnosis.

Differential diagnosis

The diagnosis should be differentiated from the following symptoms:

1. The root of the iris is broken. Iris root detachment refers to the breakage of the junction between the iris and the ciliary body. The structure of the joint is the weakest, and it is easy to break after being subjected to external force. When the force acts from the front to the eyeball, the pupil is blocked, the peripheral sclera is dilated, and the aqueous humor remaining in the anterior chamber is impacted by the iris around the aphakic support. The force of the blunt contusion is directly generated in the striking part. In addition to damage, because the eyeball is a sphere that is not easily compressed, blunt force is transmitted in the eye, causing the root of the traumatic iris to be broken; or the penetrating injury directly causes the root of the traumatic iris to be broken.

2. Iris segmental atrophy. Segmental atrophy of the iris: due to a certain high intraocular pressure state, the iris artery has a blood supply disorder, resulting in an ischemic segment or a fan-shaped atrophy consistent with the shape of the iris artery. Iris segmental atrophy is a clinical manifestation of remission in acute congestive glaucoma.

3. The iris is inflamed. Inflammation of the iris is called iritis (the iris is the part that determines the color of the eye), and sometimes the ciliary body behind the iris is also inflamed. When the iris is inflamed, the tiny white cells in the inflamed area and the excessive protein leaking from the small blood vessels in the eye float in the aqueous humor between the iris and the cornea. If there are too many cells floating in the aqueous humor, they will attack the back of the cornea and will precipitate in the aqueous humor. The cause of iritis is unknown. One eye or both eyes may be affected. Congenital iris choroidal defect is a type of congenital partial defect of the eyeball. The defect is located in the lower part of the typical defect, which is caused by the disorder during the process of embryonic fissure closure. The specific situation is also based on clinical diagnosis.

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