Fundus exams of Lapponian herder (LH) identified multifocal retinal dystrophy (MRD), post-inflammatory lesions (PInf), canine multifocal retinopathy (cmr), and generalized progressive retinal atrophy, not associated with prcd (PRA). Identified cmr3 mutations segregate with cmr (shaded), with two exceptions in other phenotypes (details in text). Most notably, the average age of onset for disease is less than 2 years of age, while PRA typically occurs at a later age. Most variation of disease onset and expression occurs with MRD.