Loss of Vision upon standing?

It's called orthostatic hypotension, Basically, when you get up your blood pressure drops and that can cause you to feel dizzy or mess up your vision. Continue to get up slowly. If you are getting up from lying down, sit on the edge of the bed or the couch and dabgle your feet first. Hope this helps and good look at the Dr.!

Don't worry; this happens to me all the time. I have low blood sugar, so what you're experiencing is probably just a lack of food to burn when you wake up in the morning. I am at a healthy weight for my height/age too, and I have a little snack before bed, like a piece of fruit; nothing that will make too much impact on your diet. If you don't have enough food in your system, you'll experience the same effects. One of the rules to a healthy diet is to not eat past a certain time before bed, but I think that's a lie. It probably was just made for morbidly obese people, so don't let that stop you from not eating a little snack. If you have these episodes too frequently, then you should really visit a doctor. I went to a doctor after the first time I passed out for seemingly no reason ;) The episodes may get worse, so that is my best answer. . .

If by "loss of vision" you mean the room starts to get dark, like you're about to faint, that is most likely due to hypotension (low blood pressure), or some other impediment to good blood flow to your brain.

As part of most doctor visits, your BP will be checked and of course you should mention your symptoms.