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Welcome to chat. Have you noticed any spot in your left eye floating about.? Also, is your right eye involved at all?
How long did this circular streak last?
How often does it happen would you say?
It sounds like you are suffering from ocular migraines. Many times these events can be associated with nausea, a weak feeling and, sometimes, a headache may follow the visual effects, although not all the time.
A typical migraine headache starts with shimmering lights, often times they surround a blurry area or have dots or jaggedly lines associated with them. They tend to progressively increase in intensity and sometimes march across the visual field causing difficulty with reading. Many times this is then accompanied by nausea, irritability, sensitivity to bright lights and/or loud noises. After the onset of the lights (called scintillating scotomas), the headache typically starts and the light show tends to progressively go away.
Many people can have this migraine phenomenon without the headache; it is called an acephalgic migraine. Some people even start having these late in life, or may have had a few much earlier in life that behaved differently and haven't had any for decades and then begin to have them; this is not uncommon. A family history of migraines is often present as well.
This is nothing to worry about. It is not a sign of a more serious underlying condition, brain tumor or anything like that. If the episodes become so frequent that they are bothersome there are medicines that can be used to decrease their frequency or stop an episode once it has started.
Does this make sense to you?
My pleasure. Have a good evening
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