Can anxiety cause double vision?

Quite unlikely: Double vision (diplopia) is due to structural eye problems of lens/cornea, weakness/spasms of an eye muscles because of a problem with the muscle itself, the nerve for that muscle, or the area of the brain. Increased pressure in the skull (intracranial) is a cause. Anxiety may be happening with the double vision but unlikely to cause it. See your doctor since this could be more serious. Good luck!

Not constantly: Yes, for a moment, usually with dizziness. You are worth pinning this down; consult the physician who is your primary care physician; at your age & this symptom there are many causes for this. Ranging from relatively innocent to time is exquisitely important. This is not to scare;rather please why take a chance? Call tomorrow. Best wishes.

Medication: People who are on anti-anxiety medication can have double vision from medication-related suppression of the normal fusion mechanism.