Blister Surface

A blister surface in a footpath benefits visually impaired people who can use it to identify the edge of the footpath at a pedestrian crossing point. It is of little benefit to people who are not visually impaired. However, as the subject of a photograph the blister surface is of no benefit to visually impaired people, but through its texture and patterns it can benefit and be appreciated by people who are not visually impaired. A thought provoking symmetry involving the relationship between photography and reality?