The speed of sight is determined by the Intensity of Focus. Ultimately the Intensity of Focus is determined by the strength of the propelment of vision into the single point of vision found where the the streams of vision from the two carnal eyes meet.
For beings who possess usable melanin, Light’s speed is irrelevant without understanding Intensity of Focus. Intensity of Focus determines a single ray of light’s practical usability on a human level. Meeting a single ray of light at the earliest possible point to meet it at as it leaves the sun determinesthe strength of your Intensity of Focus. Perceptually, dominance over the science of ballistics & even Einsteins E=MC2 is reborn here. (See the symbol for rebirth in the equation above.) (Source)