Non-compliance can be subdivided into voluntary and involuntary types. Voluntary non-compliance is patients deciding not to use their medication. Involuntary non-compliance refers to situations where medications are used incorrectly, such as eye drops missing the conjunctival sac, using incorrect medication, or following an incorrect regime. The impact of non-compliance is particularly important for patients with chronic diseases such as glaucoma.¹

We collected data from patients in our clinic to try to ascertain the frequency and nature of any discrepancies between the drop regimes patients were using and what their notes said their current regimes should be. …