You should definitely not fly until you are off the drops that affect the pupil size of the eye as it also affects the ability of the eye to compensate for distance of an object (accommodation). This is a major issue if you switch from looking out the cockpit to looking in at the instruments. If the CAA require notification of any infection over 3 weeks then you have to tell them but I doubt it will be a problem long term as long as your sight returns to normal.
Get well soon!