Niosomes in topical ocular delivery are
preferred over other vesicular systems because of the following reasons: (1) chemical stability; (2) low toxicity
because of their non-ionic nature; (3) handling surfactants
with no special precautions or conditions; (4) the ability to
improve the performance of the drug via better availability
and controlled delivery at a particular site; (5) being
biodegradable, biocompatible and non-immunogenic (12).