I have retextured the eye whites to stop them looking so bloodshot as if everyone had a excessive drinking or potion problem. I've been waiting for someone to tackle the look of the whites but no one has, so I thought I would give them a go myself. I've left the irises as they are in the vanilla game but changed the normal maps, shadow map and surface map to make the eyes look a bit more 3D and the light reflection that little more twinkly.

VERSION HISTORY:
1.0: Initial release
2.0: Fixed the over brightness ( should of checked version 1.0 out in more places but you can't see every situation unless you are playing the game, :) . It appears certain places and situations illuminate the eyes more than other places which is why I couldn't understand why I had so many comments about this, thanks everyone for pointing this issue out. Tweaked the shadow map, now the shadows are not so sharp and look a bit more natural. If more issues with the mod are found, please post them.
3.0: Tone down eye whites a slight bit more, I am now completely happy with them. Added an optional Witcher iris version, which gives Witchers a cat look to the irises (actual cat iris used) and a stand alone version for those who only want Witcher eyes changed to cat style.
3.1: Improved the normal maps for all versions, now the iris detail is more significant than the other versions. Improved the detail map so the reflections  produced by the cube map look more natural and the eyes a bit more glassy (I wouldn't of minded replacing the cube map but the Modkit won't let me, pity it could of done with some work on it). Cat eyes versions, I have narrowed the pupils because I didn't like the vanilla size of them and added brighter iris version (requested by AgentChaos ) and a alternative version (requested by kieranh7 ) of both brighter and none brighter versions. The alternative versions reduces the dark ring around the iris to almost not being visible. I am now completely happy with this mod and now consider it the final version and will no longer be taking anymore requests. I haven't uploaded any images of version 3.1 because they'll just look like version 3.0 and the extra detail would only be noticed in game during movement. Thanks very much to all who have and are enjoying this mod and for the endorsements given.

COMPATIBILITY:
Not compatible with any textures which replaces the eyes. If you want me to make a compatible version with another mod, message the author and see if I will be allowed to first and then leave a post and I'll see what I can do.

INSTALLATION
Install with NMM and activate or download and place the 'modWHITES' into your 'Mods' folder. If you do not have a 'Mods' folder create one in your main Witcher 3 directory.

OTHER MODS:
Skyrim:
DOOR
SOUL
SPRAY
DROPS
MIST
OIL
ELECTRIFY
RIPPLES
STEAM
ATMOSPHERE
RAIN
AURORA
STARS
SNOW
LEAVES
DANDELION SEEDS
DUST
WEBS extended

Dragon Age Inquisition:
DAI SWEETFX
DAI RESHADE
TEETH
EYES

Witcher 3:
WEATHER
BLOOD
SPLASH