Colleen: see posting 5 July 2013. The ophthalmologist wrote ' to be honest I could not find any pathology to account for this scotoma . . . '
NatureChick: sun exposure and optometrist see posting 1 Aug 2013
The only reason I am posting all this is because this symptom so far appears to be unique. In case it has a celiac basis this seems to be one place to look for answers..