First I wil metion: Primary lens luxation (PLL) is a genetic disorder that affects the eye of a miniature bull terrier. It occurs when the fibers that hold the lens in place in the eye weaken and the lens becomes displaced from its normal position. This can cause vision problems and can lead to glaucoma, which can be very painful for the dog. If left untreated, PLL can cause blindness. It is a serious condition that requires prompt medical attention. Treatment options may inc