Conjunctival foreign body

Introduction The most common foreign matter in the eye is dust, sand, iron filings, coal dust, and the like. It is often attached to the surface of the eyeball or hidden in the eyelids, causing discomfort and different eye pain and irritation.

Cause

Iron particles, grains, lime sand and other foreign objects splash into the eyes, consciously have foreign body sensation, pain, tears and other irritating symptoms, flipping the upper eyelids visible. Most of it is due to the entry of some foreign matter in the eye, resulting in an uncomfortable feeling in the eye, and the symptoms of the eye caused thereby. There is also the usual protection of the eyes, so that the above symptoms occur.

an examination

Related inspection

Ophthalmic examination ophthalmoscopy

Diagnosis is based on clinical symptoms.

1. If the foreign body is only on the surface of the cornea, the pain is obvious, the light is afraid, and the tears are shed; but the foreign body is removed without leaving scars.

2. If the foreign body is large and deep, damage the cornea, it is easy to form keratitis, corneal ulcer, eye pain is aggravated, eyelid swelling, fear of light, increased tearing, decreased vision, corneal leukoplakia, severe ulcer perforation, poor prognosis .

3. If small coal dust, glass, sandstone, etc. remain in the cornea for a long time, it does not have chemical action, and may not produce significant symptoms; if it is a metallic foreign object such as copper or iron, it may cause a chemical reaction and form on the surrounding corneal tissue. A necrotic area with rust deposits.

Differential diagnosis

Corneal foreign body: Small foreign matter 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 when exploded. , 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.

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