So I got to experience this first hand, freaked the fu*k out,then did some research. I had "flashes" in a sense on the far right of my right eye, Thought I was going to die(not really). I am sure veterans will see this and say "duh" and it's old news to you but this is my first PCT and wanted to post this to help other first timers in case they freak like me. Its almost like seeing the world though a kaleidoscope without all the pretty colors, just real-world images and colors. Here are my findings:

Visual Symptoms

Patients should be advised that blurring or other visual symptoms such as spots or flashes (scintillating scotomata) may occasionally occur during therapy with Clomid. These visual symptoms increase in incidence with increasing total dose or therapy duration and generally disappear within a few days or weeks after Clomid is discontinued. Patients should be warned that these visual symptoms may render such activities as driving a car or operating machinery more hazardous than usual, particularly under conditions of variable lighting.

These visual symptoms appear to be due to intensification and prolongation of afterimages. Symptoms often first appear or are accentuated with exposure to a brightly lit environment. While measured visual acuity usually has not been affected, a study patient taking 200 mg Clomid daily developed visual blurring on the 7th day of treatment, which progressed to severe diminution of visual acuity by the 10th day. No other abnormality was found, and the visual acuity returned to normal on the 3rd day after treatment was stopped.

Ophthalmologically definable scotomata and retinal cell function (electroretinographic) changes have also been reported. A patient treated during clinical studies developed phosphenes and scotomata during prolonged Clomid administration, which disappeared by the 32nd day after stopping therapy.

Postmarketing surveillance of adverse events has also revealed other visual signs and symptoms during Clomid therapy (see ADVERSE REACTIONS).

While the etiology of these visual symptoms is not yet understood, patients with any visual symptoms should discontinue treatment and have a complete ophthalmological evaluation carried out promptly.