I've been having white flashes at the corner of my eye?!

If they are what I think they are, you can't get rid of them. The back of the eye can "tear" and that causes the white flashes as well as floaters (tiny dark/blurry spots in your vision). It could very well be a side effect of the med. I'd make an appt with an eye dr., not your family physician.

I had them and did not pay any attention to them, Do any of the straight blinds have curves in them, I want you to google an Amsler grid and look at the dot in the center, are any of the lines curved? If they are you need to see a Ophthalmologist, some of the symptoms mean degeneration of the macula. It can happen at any age.

That is how mine started.