Via Keyshot. Duplicated the eyes, scaled up and positioned to mimic a little bit of thickness, filled them with white, add high spec glass material then alpha transparency to get the effect.
The Venom 'render' is actually a screengrab of the realtime viewport in Keyshot 5 after letting it sit for about 30 secs. I use a translucent material but adjust the properties, surface to grey and sub-surface to black and pretty much 0 translucency, sounds pretty odd but that material just renders slightly differently to…