پذیرش اینترنتی

Corneal Injuries

چهار شنبه 8 فروردین 1397
بازدید: 2515

Corneal Injury and Foreign Bodies

 

Minor scratches or abrasions to the cornea are common. They can be extremely sore but usually heal in 24-48 hours. A course of antibiotic eye drops or ointment is commonly prescribed to prevent an eye infection from developing. More serious injuries to the eye may occur from sharp objects and from small flying particles hitting the eye at high speed. Serious injury can also result from chemical burns. Always see a doctor for a proper eye examination if you suspect that your eye has been injured from a small flying particle, or from a chemical.

 

What causes corneal injury?

·         Corneal scratches/abrasions

·         Small flying objects

·         CS gas and pepper spray

·         Radiation damage

·         Chemical injuries

 

Examination of the eye

If you suspect you have a corneal injury, it is best to see a doctor. If you suspect an injury from a flying small particle or from a chemical you should see someone quickly, which may mean attending accident and emergency. A doctor may use a magnifying instrument to examine your eye. A drop of a special dye (fluorescein) is commonly put on the front of the eye if a corneal injury is suspected. This shows up scratches that might otherwise not be seen. The eye examination also checks for serious damage.

 

What is the treatment for a corneal injury?

Treatment for a chemical burn to the eye

All chemical eye injuries should be treated very seriously as they can damage your vision severely. Treat with immediate first aid by irrigating the eye massively with clean water:

Treatment for CS gas and pepper spray

CS gas is ideally treated by evaporating the substance off the eyes using a hair dryer on a cool setting. Clothes should be removed and ventilated; you should ideally have a lukewarm shower. Pepper spray should be washed out immediately with copious liquid, as if it were a chemical injury.

Treatment for scratches/abrasions/flying objects/radiation injury

A small corneal scratch or abrasion usually heals over a couple of days or so.

Eye infection is a complication that may follow an injury or scratch to the cornea. Therefore, it is routine to prescribe antibiotic eye drops or ointment for up to a week to prevent infection. Chloramphenicol or fusidic acid are most commonly used, although if you have scratched your eye with a contact lens you may be prescribed gentamicin eye drops. Painkillers such as paracetamol or ibuprofen will ease pain.

Sometimes a small particle becomes slightly embedded in the cornea. This needs to be removed, as it may lead to infection or staining. It is often possible for a doctor to remove it using a cotton wool bud. Sometimes a fine needle may be needed to lift it out. Local anaesthetic eye drops are used if this is done, to make the procedure painless. The surface of the eye is actually surprisingly hard so don't worry. The doctor will not harm your eye with the needle. A particle of metal on the eye is removed in the same way. However, if it has started to produce a ring of rust this is removed using a specially burring tool, to make sure that all the rust spots are removed.

 

How to prevent corneal injuries

Always wear eye protection when you drill, saw, etc - activities which cause flying small particles. Wear specialised ultraviolet protection when welding, skiing, mountaineering, using sunbeds and in any other situation where there is a lot of light radiation. Take particular care when using hazardous chemicals such as acid or alkali, washing your hands regularly and protecting the eyes if there is any risk of material splashing or exploding. Wear protective goggles when dealing with cement and plaster dust.

A leaflet on protecting the eyes is available from the Canadian Ophthalmological Society (see Further reading below).

Follow-up

Depending on the severity of the injury, your doctor may advise that you should be reviewed in 24-48 hours after the injury. This is to see if healing is underway. However, see a doctor as soon as you can if your vision becomes worse, if you have worsening pain (beyond that due to the local anaesthetic wearing off) or if your corneal abrasion does not seem to have healed after 72 hours.

 

 


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