This is Anastasios I, Byzantine emperor from 491 until his death in 518: see generally alpha 2077. Greek sources give him the epithet Dikoros (for the Suda itself cf. kappa 1648, mu 1317, tau 983) because each of his eyes was a different color: the left grayish, the right dark. For the etymology cf. kappa 2078. A TLG search for di/koros yields only Anastasios, as if the word were invented to describe him.
(Anastasius is called a)ke/falos, literally "headless," in Symeon Logothetes (118.14) and '[one] of the Akephaloi' in Joel's Chronographia compendiaria (43.13), but this is not germane to the present entry; rather the term probably refers to the heretical Monophysitism he espoused.)