Hello and thanks for your question. When you have such an intermittent blurring of the vision that happens in one eye and is only for a few minutes and is not accompanied by flashing or shimmery lights or curtains or veils in the vision or headaches (reliably), then this is very most likely just due to a momentary abnormality in the tear film, or the layer of tears that coats the front of the eye. This layer of tears is needed for the front of the eye to be healthy, but also to allow for clear vision. It is very common for the tear film to become disturbed momentarily and cause the vision to blur. But it's also very common that it only lasts for several minutes and improves with blinking.
Does this make sense? Does this information help address your concerns?
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My opinion is solely informative and does not constitute a formal medical opinion or recommendation. For a formal medical opinion and/or recommendation you must see an eye doctor. Thanks for your inquiry!