Medical Questions > Conditions and Diseases > Vision and Eye Disorders Forum

line of irregular triangles appears briefly to left of my field

3 times in the past 8-9 months I have had a floating distortion in my field of vision - difficult to discern in detail but something like a (slightly curved?) L shape made up of a train of smaller L shapes (or triangles), situated to the left side of my field of vision and lasting for less than an hour in each case. I have had several bouts of laser surgery to repair a slight retinal tear in the past 20 years but have been in the clear for my past 2 bi-annual checkups.
The line is sometimes partially coloured and has a geometric quality to it like a diffraction of light & looks something like the "front lines" in a weather map.

Is this something anyone else has experienced?
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replied June 14th, 2018
Thanks for a tip from an other source I found that Ophthalmic Migraine was very close to the mark according to examples shown at 'Ophthalmic Migraine Pictures to Pin on Pinterest - PinsDaddy'
but 'What is an Ocular Migraine' (https://migrainemantras.files.wordpress.c om/2017/07/2.png?w=620 ) gave me pause for thought ( aka visual. retinal, ophthalmic or monocular(meaning one eye) migraines...cause vision loss or blindness in one eye(differs from an aura which affects both eyes)) set me straight & 'Migraine Aura'( conditions/...with.../migraine-aura/vid-20 084707) appears to fit the bill better
"The best known visual aura is called a fortification spectrum because its pattern resembles the walls of a medieval fort. It may start as a small hole of light or sometimes as bright geometrical lines and shapes in your visual field. This visual aura may expand into a sickle- or C-shaped object, with zigzag lines on the leading edge. As it moves, it may appear to grow. Auras aren't the same for everyone, so you might also experience bright spots or flashes. Auras are sometimes accompanied by a partial loss of vision referred to as a scotoma. Auras commonly last 10 to 30 minutes"

P.S. 'Scintillating Scotoma/Visual Migraine' ( ng_scotoma) is a related condition

Another useful contact found along the way is the 'Ocular Migraine Network'
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