Apart from the 10 SLRPs discussed above, there are seven other SLRPs yet to be studied in the retina, namely extracellular matrix 2 (ECM2) and asporin from class I; osteoadherin and keratocan from class II; epiphycan from class III; and podocan and podocan-like-protein-1 (Podnl1) from class V. Further evaluation of gene and protein expression to determine the presence and roles of these SLRPs in the retina can potentially expand new opportunities and possibilities for the understanding and treatment of devastating retinal diseases. This evidence concerns the gene PODNL1 and Abnormal retinal morphology.