Horizontal double vision - computer eye strain?

Hang on, that's *vertical* double vision, if things are stacked one on the other.

That is less likely to be simple fatigue than *horizontal* diplopia, where many people has a degree of phoria ("latent squint" in very old language) which might catch them out when very tired, the normal compensating mechanisms just letting go for a while out of tiredness.

The above could still apply, and a normal examination would show it, but the other possibility is a transient loss of blood supply to an eye muscle, (if better looking down, one of the inferior recti or superior obliques) or, less likely, to the nerve centre controlling eye movement.

It is worth reporting for a general check on blood-pressure and blood quality. etc.

Um, not really. But it truly depends on how often you sit at the computer and whether or not you take breaks. You see, if you don't take breaks at least every 2 hours, then you start running the risk of eye strain. And by breaks I mean staring off in the distance for AT LEAST 8-10 minutes.

If you don't have headaches then there is an almost 70 percent chance you don't have eye strain, because a common symptom of eye strain is Headaches. Sounds more like you do really need to go to the doctor. For your own sake, so nothing bad happens.

Learn How To Improve Eyesight!

1

Restore Your Eyesight Without Surgery : http://eye.clearvisionexercise.com/