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Hi and thanks for the query.
Blurred vision in one eye can be due to dryness of the eye due to it being left partially open while you slept because you had alcohol, but it should begin to be alright in a matter of minutes after you wake up.
I would suggest that you have this evaluated at the ER or the Urgent Care to rule out posterior vitreous detachment or retinal detachment.
Let me know if you have further questions,
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They are not a constant symptom of retinal detachment. Can occur in some instances. Please have this examined just to be sure.