why does vision go blurry for seconds?

Blurry vision for brief moments can be caused by various factors, such as eye strain, fatigue, or dry eyes. It may also result from sudden changes in focus, like moving from a bright environment to a darker one. Additionally, temporary fluctuations in blood circulation or intruding objects in the eye can lead to momentary blurriness. If this occurs frequently, it's advisable to consult an eye care professional.