Many hydrogel lenses are sent from the laboratory in a glass vial sealed with 
a metal cap and a silicone stopper.  
Some are supplied with a screw cap.   
You must be careful when removing 
the metal cap as it is easy to cut 
your fingers.   It doesn’t positively 
impress the patient if you bleed.

Use the back end of a pair of tweezers 
or other similar object to pull the 
metal tab back, break the metal band, 
and remove the band.   Then remove 
the cap.

Watch the video segment to see this done.