Probably not: Sinus pressure and infection can cause a pressure sensation behind the eyes (and rarely orbital infection), but it should not cause visual symptoms. "strobe light flashes" are more likely a retinal or optic nerve symptom, or possibly a migraine symptom. People with symptom of flashing should have an eye exam to rule out retinal problems.
Answered 8/2/2020
4.9k views
See an eye MD: You need to be seen pretty urgently. These flashes are a result of some kind of traction on your retina. It may be nothing serious but it can be the development of a tear in the retina. You need a good exam to find out. It is not coming from your sinuses.
Answered 9/28/2016
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