Dog cataract can develop on its own - for example if it is hereditary or age-related - or it can be associated with another illness or injury. In the former case, the change is usually slow.
Cataracts: How to recognize the eye disease
At the beginning of the disease, the dog's eyesight is hardly impaired, while slight cloudiness can be seen on small areas of the eye lens. If the disease progresses, the cloudy area spreads and the eye first takes on a bluish, then a milky white color until the lens is finally completely cloudy.
If both eyes are affected, note your four-legged friend's vision impairment. His gait seems more insecure and it is more difficult for him to orient himself. It can happen that he bumps into things and injures himself. If only one eye is affected, it may be the case that your dog appears to you unchanged, except for the cloudiness in the eye. Most four-legged friends quickly get used to seeing clearly with only one eye.
Lens opacification as an accompanying symptom
Cataracts can also be caused by poisoning, injuries (around the eyes), inflammation and diseases such as diabetes. In this case the dog shows other symptoms of illness besides the clouding of the eyes. Inflammation and redness around the eyes can also occur.
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Precisely because cataracts can indicate other diseases, it is important to bring the dog to the vet quickly to clarify the reason for the symptoms.