CD33 and retinal disorder: The Diabetic Retinopathy Genomics (DRGen) study revealed the involvement of Kruppel Like Factor 17 (KLF17), Zinc Finger Protein 395 (ZNF395), Myeloid cell surface antigen (CD33), Pleckstrin Homology Domain-Containing Family G Member 5 (PLEKHG5), NK2 Homeobox 3 (NKX2.3), and Collagen Type XVIII Alpha 1 Chain (COL18A1) in the progression of DR.