This volume reports study done in England and Wales in the special schools for the blind. The study was performed on a sample of 724 blind children of a total population of 3,160. In addition, 52 children of a total of 2,202 partially sighted children were reviewed. For all categories except the preschool 0 to 5 age group, the sample averaged 25% of the total number of children and may be expected to be accurately representative of the group.
Although we are not given a census figure on the total population under age 20 in England and Wales, the total number of blind children is evidently very small. Reasonably evident is the ephemeral nature of data such as these and the value of recording them. The value lies not in their immutability but their importance in documenting a stage in medical history. At this particular period, blindness due to infectious