what drugs were last prescribed to patient 55027 in 08/2105 via the both eyes route?
select prescriptions.drug from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 55027 ) and prescriptions.route = 'both eyes' and strftime('%y-%m',prescriptions.startdate) = '2105-08' order by prescriptions.startdate desc limit 1