What kind of walleye is this

Corneal leukoma can be said to be an infectious corneal disease, or it can be said to be a complication of corneal trauma. Corneal leukoma is also a corneal scar. There are many types of corneal leukoma. In addition to the corneal leukoma caused by infection, there are also congenital corneal leukoma.

1. Congenital corneal leukoplakia

Congenital corneal leukoma often occurs in the center of the cornea, but sometimes it can also occur in the periphery. It is caused by the failure or delay of the lens bubble to separate from the body surface ectoderm during the fetal period, or the result of adhesion of the mesoderm pupillary membrane to the cornea.

2. Infectious corneal leukoma

Infectious corneal leukoma: Various pathogens (such as bacteria, viruses, fungi, etc.) infect the cornea, forming corneal ulcers. After the ulcers are repaired and healed, scars are formed and visual impairment is caused.

3. Traumatic corneal leukoplakia

Traumatic corneal leukoma: including acid, alkali burns or external force to the cornea, causing corneal tissue damage, forming scars after the damage heals, and causing visual impairment.

4. Leukoma (corneal scar)

Corneal leukoma is a complication of infectious corneal disease or corneal trauma. When the corneal ulcer reaches the cleansing stage, the connective tissue in the cornea proliferates to repair the defect, the ulcer heals, and a scar is formed. If the ulcer is small and shallow and only affects the epithelial cell layer, the cornea can completely regain its transparency. If the Descemet's membrane and the superficial layers of the corneal parenchyma are affected, a dense, cloudy scar will remain. The turbidity is dark at first, then increases in concentration but never passes beyond the edge of the ulcer. The disappearance of corneal scars is only limited to infants. It is impossible for older children to do so, and permanent scars will inevitably remain, causing visual impairment. The size and thickness of corneal scars vary according to the severity of the ulcer. Thin ones are turbid and shallow, called corneal opacities, slightly thicker ones are called corneal macula, and the thickest and densest ones are called corneal leukoplakia. Corneal leukoplakia seriously affects vision and can only be treated through corneal transplantation!