Ford's first Model T engine had four cylinders in a row. Some luxury cars of the 1920s had inline engines with as many as eight cylinders. Engines with as many as 12 or more cylinders in a row have been used, but mainly in large marine and stationary engines. Of course smooth running is only one goal.
In brief: Antibiotic eye drops. They start in hours but they may take 7-10 days to get rid of the bad bacteria. ...If you start antibiotics use them as directed, usually 7 days.. In brief: Antibiotic eye drops. They start in hours but they may take 7-10 days to get rid of the bad bacteria.
Usually one would use Tobramycin eye drops for 7 days to treat external eye infections. Please make sure that you use the eye drops for the duration prescribed even if you are feeling better. If after this time the infection still persists, please make an appointment to consult with your GP. 1 person found this useful.