![]() Various poisons may also cause vision loss. Problems with the central nervous system, inflammation, tumours and increased pressure around the brain (intracranial pressure) could all cause sudden blindness. As well as the causes already listed (traumatic and chemical injuries, inflammation and glaucoma), bleeding in the eye and retinal detachment are other possible reasons for blindness. Sudden loss of vision may happen in either one or both of the eyes, although it is not always easy to be sure that the eye is blindwhen only one eye is affected. The ulcer may deepen and the cornea rupture a situation which requires emergency intervention.Ĭorneal ‘melting’ is clearly an eye emergency – the greyish, jelly like appearance of the melting cornea is typical, which can lead to corneal rupture if the dog is not hospitalised and treated urgently. For example, occasionally hairs, especially those found beneath the eyelid (ectopic cilia) can be painful if they rub against the cornea, especially in breeds susceptible to extra eyelashes (distichiasis).Ĭomplications of corneal ulceration can happen if the cause of the ulcer is not recognised or managed correctly, if the ulceration is not treated appropriately or if it is linked to other diseases, such as Cushing’s syndrome or diabetes mellitus. Many kinds of damage to the cornea can result in a corneal ulcer. When lens damage has occurred, or is suspected, urgent referral to a specialist will be required. All cases of suspected penetrating eye injury should be assessed as a matter of urgency by your local veterinary surgeon to make sure that the lens has not been damaged. The colourful part of the eye (the iris) may be caught up in the wound and, if so, the pupil (central black part of the eye) may no longer appear round. When there has been deep damage to the cornea, the clear fluid that fills part of the eye ball may escape through the wound until it forms a clot. With the exception of some brachycephalic dogs referred to above, corneal ulcers are usually painful, although they are not always obvious. Traumatic injury to the cornea (the surface at the front of the eyeball) is not uncommon and cat scratch injuries are a frequent cause of corneal ulceration. ![]()
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