corneal foreign body
Introduction
Introduction Corneal foreign body is a common ocular trauma, especially in areas with drought, wind and sand, and heavy industrial areas. Improper treatment can cause serious complications such as corneal infection and even blindness, which affects the normal work and life of patients. 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 are metal fines spilled from the machine tool, small fragments that fly and fly, metal or gunpowder particles during explosion, and coal dust. , stone chips, dust particles, chaff, fine thorns, etc. 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.
Cause
Cause
(1) Air dust and small insects fall into the eye.
(2) Broken shells in grains.
(3) Accidental explosion of industrial or mining or explosive debris during wartime splashes into the eyes.
(4) The small pieces of metal thrown by the grinding wheel fly into the eye.
The most common foreign objects are metal fines spilled from machine tools, small fragments that fly, small metal, or gunpowder particles, coal dust, stone chips, dust particles, chaff, fine thorns, and so on. 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.
Examine
an examination
Related inspection
Tear epidermal growth factor corneal examination
1. Foreign history into the eye.
2. Foreign body sensation, eye pain, light, tears and other irritating symptoms, foreign body entering the pupil area can cause visual impairment.
3. Conjunctival mixed hyperemia or ciliary congestion.
4. Check for foreign matter on the surface of the cornea. Fine foreign matter can be found with a magnifying glass or a slit lamp microscope. If the iron foreign matter stays for a long time, a rust ring can be formed around the foreign matter.
Diagnosis
Differential diagnosis
Differential diagnosis:
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.
