Welcome to HCM.
Your symptoms are suggestive of an allergic reaction
caused by the immune response against the toxin released by the insect/foreign body (which hit your eye). Even though you don't have discomfort , since redness
and discharge are still present, I suggest you to have an eye checkup done to
- make sure no remnants of the fly/dust is inside your eye
- rule out infection
-assure that your cornea
is clear without any abrasions .
Wash your eyes thoroughly and give cold
compresses with OTC lubricant eyedrops and oral antihistamine drug for a day or two until your appointment .
Take care :).