Add to ORKGMicroRNAs (miRNAs), a conserved class of small non-coding RNAs, serve as key post-transcriptional regulators of gene expression. MiRNAs have already been implicated in many human diseases through regulating diverse biological processes. Given the broad clinical and therapeutic potentials of miRNAs, it is of interest to know whether miRNAs may play a role in age-related disorders. Genetic variations in miRNA genes or in their binding sites within gene 3’UTRs are expected to affect miRNA function and substantially contribute to disease risk. In this thesis, the association of miRNA-related genetic variants with cardiovascular, neurodegenerative and ophthalmic disorders was systematically investigated followed by various in silico and in vitro...