Infections or toxins may cause the formation of these cataracts while the puppies are still in utero.These are cataracts (opacity if the lens of the eye) that are present at birth.Most are genetic most commonly seen in Australian Shepherds and other herding dogs.Does not typically affect vision and does not progress to anything else.Misshapen or thin iris (coloured part of the eye).Appears to be inherited in Burmese, Persian, and Siamese cats.Eyelid agenesis occurs sporadically in domestic cats and is rare in dogs.It may appear as notch in the eyelid, or tissue of the eyelid may be missing it usually affects the upper lid and is often bilateral.From the Greek “koloboma”, meaning defect, eyelid coloboma is a congenital defect of the eyelid in which the upper lateral eyelid is typically not formed.The following are some of the numerous eye anomalies that can occur in dogs and cats:Ĭolobomas of the lid ( Feline Eyelid Agenesis) Congenital and inherited ocular diseases are reported less frequently in the cat than the dog. Exposure to toxic compounds, lack of nutrients, and systemic infections and inflammations during pregnancy are other possible causal factors for ocular abnormalities. Eye anomalies may be genetically inherited, can develop spontaneously or occur in utero. Unfortunately, many anomalies can disrupt the way the eyes function.Ĭongenital anomalies of the eyeball or its surrounding tissue can be evident in a dog or cat shortly after birth or may develop within the first six to eight weeks of life. To do this effectively, all the various components of the eye need to be healthy. The eyes convert reflected light into nerve impulses that are interpreted by the brain as images of the world. Vitreous fluid – A clear, jelly-like fluid that fills the space between the lens and the retina.Retina – the light-sensitive tissue that lines the inside of the eye and sends visual signals through optic nerve to the brain.Lens – a transparent structure behind the iris which ‘bends’ light rays to focus on the retina.Pupil – the opening in the centre of the iris that allows light to pass through to the retina at the back of the eye.Iris – the coloured circle around the pupil, it changes the size of the pupil and allows varying amounts of light to enter the eye. ![]() ![]()
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