White line and flash in right eye when I move it or blink.

[Gjackson200]

This happens in certain lighting conditions (bright light, when looking at a white wall or curtain, when in the shade on a bright day). This never happens in the dark or pitch black.

When I look to the left and blink I see a sort of line in my peripheral vision. It's only visible for about half a second and then disappears. I'm not sure when it started and may have been here for a while but only started noticing it a few months ago.

The second thing is a similar looking bright or dark horizontal line in the bottom of my vision which occurs when I look up sharply. I'm pretty sure this has only been in the last 3 weeks.~

Both things only happen when I make an eye moment.

I went to an ophthalmologist clinic 2 weeks ago to get it checked out and they looked extensively for any retinal problems. I then was asked to come back 2 weeks later for a check up and they compared the two pictures of my retina they took (with dilated pupils). There was a sort of small line that the doctor pointed at and said 'that's just your eye', but nothing has changed so there's no problem, you're completely fine, relax.

Well it's been a week later and I'm still seeing the same flash line when I look up in my right eye... I'm just pretty worried about it and I don't speak the language here very well, so couldn't communicate that well with the doctor.

My eyes are also extremely dry for the past 3 months when I go to sleep. My right eye does feel a little tired and strained.

If anyone could shed some light that would be amazing.

[JohnHaganMD]

Dry eyes would not cause this. Use the search feature and read the many posts and discussions about treatment of dry eyes.  It is likely you have become aware of a normal 'entopic phenomena"   Internet Search that and read about. Section on wikipedia is good.

[Gjackson200]

I'm 25 years old by the way, and do have moderate myopia.