corneal burns and scratches
Introduction
Introduction The cornea is like the glass covered on the watch, it covers the iris and the pupil. The outer layer of the cornea is the fastest-recovering tissue, but it cannot be taken lightly. Sunlight or some external objects, especially those with rough surfaces, can cause different degrees of abrasion of the cornea, such as corneal epithelial defects or exfoliation. Contact with common chemicals in the home can also cause the disease. The eyes will be red, it will hurt, and it will always shed tears. Simple shallow abrasions, the treatment effect is good.
Cause
Cause
The most common cause of corneal burns: sunburn and exposure to common chemicals in the home. Another incredible reason is: being burnt by a curl. The mascara ran into the eye, or did not remove the contact lens while sleeping, scratching the corneal surface.
Examine
an examination
Related inspection
Corneal examination epidermal growth factor
The eyes will be red, it will hurt, and it will always shed tears. Simple shallow abrasions, the treatment effect is good. If only the corneal epithelial lesion or the epithelial layer is peeled off from the front elastic layer, most of them can be repaired within 12 hours, and those with larger ranges take longer. However, if the treatment is improper or infection occurs, it will not only prolong the course of the disease, but also leave different degrees of corneal opacity.
Sometimes the corneal superficial abrasions, after the repair of the epithelium, every few weeks or months, the eyes suddenly have pain, tears and photophobia and other similar irritations when rubbed, mostly in the morning when waking up, Symptoms gradually relieve after 1 to 2 days, but often recurrent, ranging from a few days to several months. Check that the corneal epithelium of the original abrasion is detached and the fluorescein can be stained at the defect. This is called recwrrent corneal erosion. It is often seen that a filament is attached to the cornea, which is the surface tissue of the corneal epithelium or edema that is detached. This condition often occurs in the sharp abrasion of the cornea, which may damage the basement membrane of the corneal epithelial layer, so that the newly formed epithelial cells are not easily formed firmly.
Diagnosis
Differential diagnosis
Incised wounds of the cornea: Corneal penetrating trauma will be described in the eyeball penetrating injury. Non-punctual corneal laceration is relatively rare, and its symptoms are similar to corneal abrasions. The difference is that the damage is deeper, the healing time is longer, and the scar corneal opacity remains after healing, which often changes the curvature of the corneal surface and affects the visual acuity.
Foreign bodies of the cornea: small foreign body debris stays on the surface of the cornea or penetrates into the cornea. It is called corneal foreign body. The most common is the metal fines spilled from the machine tool, the tiny fragments that fly and fly. Metal or gunpowder particles, coal dust, stone chips, dust particles, chaff, fine thorns, etc. during the explosion. Factory workers' corneal foreign bodies have the most iron filings. Most corneal foreign bodies remain in the shallow branches or surfaces of the cornea, but there are also deep layers that penetrate the cornea. As for the number of foreign objects, it can be one, several or several days.
Corneal ulcer: an eye disease caused by infections such as bacteria, viruses, and fungi. When the pathogenic factors invade the cornea, the limbal vascular network first expands and is congested, called ciliary congestion. Inflammation oozes, white blood cells invade the lesion, causing edema and edema of the epithelium and stroma, called corneal infiltration. If the condition cannot be controlled, the infiltration will continue to worsen, and degeneration, necrosis, and tissue shedding will occur, and corneal ulcers will form. The infiltrated base is grayish white and the edges are unclear. If the treatment is appropriate, the inflammation is controlled, the base and edges of the ulcer are gradually cleaned, the boundary is clear, the surrounding epithelium is regenerated, and the connective tissue proliferates to form different scars.
Corneal erosion is a symptom of superficial punctate keratopathy. Shallow punctate keratopathy is a general term for the type of corneal epithelial lesions, namely, punctate epithelial keratitis, punctate epithelial erosion and punctate subepithelial infiltration, which often exist at the same time, but the weight and extent of the lesion are biased and different.
