text: Its limpid , globular eyes , which appear red or blue , depending on lighting , are proportionately the largest in the animal kingdom at 2.5 cm ( 1 inch ) in diameter .
simplified: Its limpid , globular eyesâ '' which appear red or blue , also depending on lightingâ '' are proportionately the largest in the animal kingdom at 2.5 cm ( 1 inch ) in diameter .