Raila's eye ailment that leaves his left eye shedding "tears" is attributed to bad lighting in jail cells during his long nine-year stint in detention-without-trial, five years of which was in solitary confinement and incommunicado at the Kamiti Maximum Security Prison. In 2008 after the nusu-mkate govt was formed, he underwent a laser eye surgery in Germany, but the condition wasn't fully corrected, a reason he's always wiping it with a handkerchief. I hope this enlightens those who are making a mockery out of it.
