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Abstract
Ageing is not a disease; it is a multi-factorial process that can be defined as the progressive loss of function accompanied by increasing morbidity and decreasing fertility with advancing age (Franco et al., 2007).As people advance in age, normal functions of the eye tissues decrease and blinding disorders increase in frequency (National Eye Health Education Program, 2008). Statistics gathered by the World Health Organization (WHO) in 2002 showed that glaucoma is the second leading cause of blindness worldwide, after cataracts. However, glaucoma presents perhaps an even greater public health challenge than cataracts because the blindness it causes is irreversible. Therefore, WHO officials are looking for ways to address the problems glaucoma causes (Pascotto, 2010).