possibly ‘Luxor’ goggles – privately bought in preference to the issue set (faceted perspex).

ref p. 141 ‘Battle of Britain’ by Richard Townshend Bickers (salamander Books ltd 1990)

run a google image search for ‘luxor goggles’ and it should be a picture of the offending item. If not, one issue set was fairly similar but un tinted and more shaped around the bridge