Number of children who were in Primary 1 in school year 2007-08 as at May 2008, and who have a pre-school vision screening record on CHSP pre-school as at November 2008. 5. Data are not available for the following NHS boards: NHS Ayrshire and Arran, NHS Grampian, NHS Greater Glasgow and Clyde, NHS Highland, NHS Orkney and NHS Shetland. 6.