You should seek the advice of your veterinarian if your pet is ill as only he or she can correctly advise on the diagnosis and recommend the treatment that is most appropriate for your pet.

Topical antibiotic preparations suitable for administration on eyes vary in their spectrum of activity

Ophthalmic antibiotics should be selected based upon their spectrum of activity, and preferably following microbiological culture and sensitivity testing. The following table lists some of the common antibiotics and their range of activity :

 

Organism type	Antibiotics	Comments
Broad spectrum activity - affect gram-positive and gram-negative organisms	Aminoglycosides ( gentamicin, tobramycin and neomycin) -NOT effective against Streptococci. Tetracycline and Polymyxin B combination.- Some staphylococci and streptococci resistant Chloramphenicol - Pseudomonas often resistant Fluoroquinolones (ciprofloxacin, norfloxacin and ofloxacin)  Polymyxin B and neomycin and bacitracin Polymyxin B and neomycin and gramicidin	Use only as last-line of treatment to prevent resistant strains emerging.
Gram-positives only	Erythromycin
Mycoplasma	Erythromycin Polymyxin B and oxytetracycline
Chlamydia	Erythromycin Polymyxin B and oxytetracycine