Are both eyes equally affected?
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Do your eyes itch?
That makes the "diagnosis" of allergic conjuctivitis very unlikely - prominent symptoms are itch,redness and some excess watering.
Do you have any redness of your eyes?
Is it worse at any special time of the day?
Are you in good health otherwise?
Does the blurriness clear if you blink?
Your history is more suggestive of blocked tear ducts.
An ophtlamologist could "probe" the ducts for you - that may be all that is required.