If one is to look at the Latin behind the word 'dyscopia' or its close relative 'acopia' one will find that the word 'copia' means 'plenty' (see www.archives.nd.edu ) and with the addition of the prefix 'a' or 'dys' we can define acopia as the absence of plenty and dyscopia as difficulty attaining plenty.There are some unfortunate misuses of these words in the medical fields where they are imbued with the meaning 'not coping' or alternately 'unable to copy' (see and en.wikipedia.org and www.dyscopia.com for more information).