This eBook is the first volume of the Collection "Practical Things... My Way" in which the author, dr Narcisa Ianopol, shares her clinical experience in the management of diabetic retinopathy, and some research studies with measurements of retinal lesions using a software called SITE-App. Dr Ianopol developed the SITE-App software that is now at the latest variant SITE-App 2023, that is described in details in the volume 3 of this collection.