111. So apart from the active ingredient N-Acetyl-Carnosine (N.A.C.) what else do IMH eye drops contain?

The active ingredient called N-Acetyl-Carnosine - N.A.C. - needs to be in a "carrier" eye drop solution to deliver it to the eye. So IMHO eye drops also contain steam distilled water to "carry" the N.A.C. into the eye. The solution also contains our own specially formulated anti microbial ingredient, which is effectively a Colloidal Silver. Colloidal Silver is known to kill over 650 types of pathogens, it is often referred to as “natures antibiotic” and facilitates a one year shelf life.  You can read more about Colloidal Silver here. 

By following the instructions that come with the eye drops, IMHO eye drops should remain good to use until the 10ml bottle is empty, which can take up to 2 months or so.

IMHO eye drops are completely holistic and contains no nasty additives or chemicals..