A method for assembling a syringe, the method comprising: supporting a syringe barrel that bounds a compartment extending between a loading end and an opposing dispensing end , a stopper being movably disposed with the compartment of the syringe barrel with a liquid dosage being disposed within the compartment between the stopper and the dispensing end; inserting a distal end of a plunger rod into the compartment of the syringe barrel at the loading end thereof; and taking a first pair of digital images either before, during or after inserting the distal end of the plunger rod into the compartment of the syringe barrel, the first pair of digital images comprising a first digital image of the stopper within the syringe barrel taken by a first camera and a first digital image of a needle shield secured to the dispensing end of the syringe barrel taken by a second camera , the first pair of digital images recording an initial position of the stopper relative to the syringe barrel; coupling the distal end of the plunger rod to the stopper located within the compartment of the syringe barrel so that the plunger rod is secured to the stopper; taking a second pair of digital images during or after coupling the distal end of the plunger rod to the stopper, the second pair of digital images comprising a second digital image of the stopper within the syringe barrel taken by the first camera and a second digital image of the needle shield secured to the dispensing end of the syringe barrel taken by the second camera; and characterised by the further step of comparing the second pair of digital images to the initial pair of digital images using a computer processor to determine if the stopper has moved relative to the initial position. supporting a syringe barrel that bounds a compartment extending between a loading end and an opposing dispensing end , a stopper being movably disposed with the compartment of the syringe barrel with a liquid dosage being disposed within the compartment between the stopper and the dispensing end; inserting a distal end of a plunger rod into the compartment of the syringe barrel at the loading end thereof; and taking a first pair of digital images either before, during or after inserting the distal end of the plunger rod into the compartment of the syringe barrel, the first pair of digital images comprising a first digital image of the stopper within the syringe barrel taken by a first camera and a first digital image of a needle shield secured to the dispensing end of the syringe barrel taken by a second camera , the first pair of digital images recording an initial position of the stopper relative to the syringe barrel; coupling the distal end of the plunger rod to the stopper located within the compartment of the syringe barrel so that the plunger rod is secured to the stopper; taking a second pair of digital images during or after coupling the distal end of the plunger rod to the stopper, the second pair of digital images comprising a second digital image of the stopper within the syringe barrel taken by the first camera and a second digital image of the needle shield secured to the dispensing end of the syringe barrel taken by the second camera; and characterised by the further step of comparing the second pair of digital images to the initial pair of digital images using a computer processor to determine if the stopper has moved relative to the initial position. <EOS>