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Having been subject to distressing subjective visual sensations during the greater part of my life at intervals varying from three or four days to a month or even longer, I think it is worth while to describe them in detail. I have made numerous notes from time to time and have recorded the effects of various remedies which I have tried in order to obtain relief.
Unfortunately I have had no opportunity of consulting the various books and medical journals, as there is no medical library in Durban, where I reside. However, as I have taken a large number of notes at the time of the attacks, a report may be of some interest and value.
The sensations always take the form of what is commonly called fortification spectra or teichopsia and have never in my case been accompanied with migraine or sick headache. Moreover I have never had
JOHNSON GL. SUBJECTIVE VISUAL SENSATIONS. Arch Ophthalmol. 1936;16(1):1–4. doi:10.1001/archopht.1936.00840190011001