1) Blindness 
visual blurring and colours associated with migraines
The jagged, shimmering visual sensation resembling the fortifications of a walled medieval town; the scintillating scotoma of migraine. ... Origin: G. Teichos, wall, + opsis, vision ... (05 Mar 2000) ... 
(ti-kop´se-ә) scintillating scotoma; the sensation of a luminous appearance before the eyes, with a zigzag, wall-like outline.
Type: Term Pronunciation: tī-kop′sē-ă Definitions: 1. The jagged, shimmering visual sensation resembling the fortifications of a walled medieval town; the scintillating scotoma of migraine. Synonyms: fortification phenomenon