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Eye: ocular foreign body
Introduction
- Foreign bodies can be both extra and intraocular.
- Cause: presence of foreign body in eye.
- Signs: usually uniocular, can be acute with hyperemia and pain; chronic cases have purulent discharge.
- Diagnosis: history, clinical signs, ophthalmological examination.
- Treatment: removal of extraocular foreign body; intraocular foreign bodies are possibly best leftin situunless organic.
- Prognosis: usually good if foreign body is extraocular and is identified early and removed.
Presenting signs
- Blepharospasm.
- Ocular pain.
- Ocular discharge, serous to purulent.
- Ocular hyperemia.
Acute presentation
- Ocular hyperemia.
- Ocular pain.
Breed/Species predisposition
- More likely in working breeds.
- Brachycephalic breeds.
Pathogenesis
Etiology
- Usually FB is plant material or thorn and should always be removed in these cases.
- Metal FB and animal quills are other types.
Predisposing factors
General- Brachycephalic breeds.
Pathophysiology
- Foreign body in cornea → reflex uveitis if left and focal keratitis with ulceration (not always ulceration).
- If foreign body penetrates globe may stimulate severe uveitis.
- If FB penetrates lens, a cataract can occur or lens capsule rupture with phacolytic uveitis and subsequent glaucoma.
- FB in vitreous may be associated with vitreal hemorrhage and/or retinal detachment.
Timecourse
- Usually acute onset signs.
- Foreign body may be present for some time before presented by owner.
Diagnosis
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Treatment
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Prevention
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Outcomes
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