Supplementary law

The small frame supplement was indeed as described in the answer, but this was superseded by the 'small glasses supplement' (SGS) introduced by Health Service Circular 1999/051 in March 1999. In addition to boxed centres of 55mm or less, this introduced the additional requirement that the spectacles must also require extensive adaptation, such as a change to side length or specially worked convex lenses. Boxed centres alone are no longer sufficient to claim the SGS. Trevor Warburton Stockport, Cheshire