Emerald Education Systems Inc, -- formerly doing business as Emerald Events Inc - was originally founded to plan and manage on-site continuing education events. The company evolved into a focused provider of authoritative instructional media for the health care field; the firm has developed and marketed online learning and communications textbooks for the health care community. The firmâs first âliving textbookâ Principles and Practice of Low Vision Rehabilitation, is the first online comprehensive body of knowledge about low vision rehabilitation. PPLVR is designed to provide a deep and broad body of knowledge in a comprehensive and progressive teaching format. Each "chapter" in the book is a 2 to 4 credit-hour online course on one of 32 different low vision rehabilitation subjects, authored by 41 experts in the field. The program allows practicing professionals the opportunity to fill a hole in their education at their own pace, on their own schedule, at a significant cost savings, with the same depth of knowledge that is offered in an academic course of s