It seems from the history that you are having allergic conjunctivitis
, for which you are on treatment from lastacaft eye drops, which is a antihistaminic drug.
The treatment for allergic conjunctivitis is by using antihistaminic drugs for symptomatic treatment.
The other options available are mast cell
stabilizers and low potent steroids
Antihistaminic drugs usually offer symptomatic relief, if your symptoms are not getting cured you need to try next drugs like mast cell stabilizers and low potent steroids. However steroids are to cause many side effects hence they have to be used under doctors supervision. Hence please contact your eye doctor for further advice regarding this.
However the novel treatment for allergy
is to avoid the allergen, hence try to find out the allergen which is causing allergy and try to avoid it, if possible.