Lakeland Terriers are generally healthy with a lifespan of 9 to 15 years but are also prone to health issues, albeit not many. Here are a few health conditions that most Lakelands often have: Primary Lens Luxation, Cataracts, Persistent Pupillary Membranes, Microphthalmia, Ventricular Septal Defect, and Legg-Calve-Perthes Syndrome.