Such people have many abilities and can achieve many things despite visual impairment or blindness, but there are times when they will appreciate and welcome practical assistance. They may be sportsmen and women, gardeners, farmers, chess players, teachers, typists, musicians, lawyers, housewives, computer programmers, physiotherapists, social workers, telephonists, parents……

Visually impaired and blind people come from all kinds of backgrounds. It is often within the eye hospital itself that the lack in education of health workers and their understanding of the assistance needs of blind and visually impaired patients is all too evident. We have to understand their difficulties, recognise their abilities and learn how to cooperate and communicate with them in a social as well as hospital environment. The Put operation in the LevelDB and RocksDB API is a blind write. So I limit this post to disk-based DBMS and allow a blind-write to read in-memory search structures.

But I need to add an exception for some reads, because an LSM has to search the memtable to insert key-value pairs. Despite our gained knowledge, sadly, our efforts are not always successful and we are presented with the responsibility and challenge of caring for people who have to cope with visual impairment, perhaps for the rest of their lives. A blind write is done without hidden or explicit reads.

As eye health workers, we give much attention to learning and teaching the importance of health education and the prevention and treatment of eye disease.