Lens luxation is a potentially blinding and painful problem seen in a number of purebred dogs. The terrier breeds are over represented, being due to a genetic weakness in the supportive ligaments of the lens (lens zonules). The Tibetan Terrier is the most commonly affected breed presented to the Auckland Animal Eye Centre with lens luxation.

Lens luxation is also seen in cats and horses, but is more commonly associated with previous long term low grade inflammation (uveitis) or prior trauma. Early and aggressive therapy is needed with lens luxation, particularly when the lens comes into the front of the eye (anterior luxation) for the best chance of maintaining the eye and vision. Anterior lens luxation often requires surgical intervention.