Characterizing protection ability of blue blocking lenses using K-means clustering - Che Azemin, Mohd Zulfaezal; Ahmad, Norsham; Ithnin, Mohd. Hafidz; Mohd Salleh, Mohd Hazimin; Mohd Tamrin, Mohd Izzuddin; Rosli, Saiful Azlan (2020)