Coxes can wear Sunglasses or Goggles instead of a Visor
A few people have found coxing difficult while wearing a mask and Visor. The latest update from British Rowing suggest that it is OK to use sunglasses ( and presumably glasses? ) or goggles rather than a visor to protect your eyes whilst coxing.
" In a stern loader - coxes should wear both a face covering and eye protection - this eye protection could be goggles, sunglasses or a face visor (a visor protects both eyes and additionally keeps the face covering dry). "