Dizziness and temporary loss of vision when standing?

Low blood pressure? If the symptoms are reliably triggered by changes in position (e.g. standing from a seated or lying position), they may represent orthostatic hypotension, a drop in blood pressure brought on by movement. Your PCP can confirm this and help narrow down causes, such as dehydration, heart trouble, or neuropathy.

Related Questions

What are the causes of dizziness and tunnel vision/temporary loss of vision?

Blood pressure. The most frequent symptoms of low blood pressure can be dizziness and temporary loss of side vision (closing in). Be sure to have this checked out first with a simple blood pressure test.
Dizzy. This could be a stroke or stroke warning sign. Seek care immediately in the er or a local ophthalmologist...