Brief Answer:
It can be because of transient ischemic attack.

Detailed Answer:
Hello
Welcome to Health care Magic.


I am Dr. DADAPEER K, an Ophthalmologist and I will be answering your question.
I reviewed your history.

Brief double vision is usually caused transient ischemic attack.
The common causes are hypoglycaemia, hypovolemia, decreased blood pressure....
Hence need to check for these common things by measurement of blood glucose levels, blood pressure levels....

Hence I advice you to consult your doctor to rule out these things.

Hope this information is helpful to you.

Do write back to me for further questions.

Thank you
With regards

---