Pfft. Wesker can see just fine in the dark with his glasses when he has his PLOT DEVICE MEDICINE in check.
Umbrella Chronicles shows that like seven times -- when he leave the facility, when he escapes the mansion, especially when he infiltrates the Russian Facility in the dark AND in a blizzard. Then there is CVX which takes place mostly at night and outside. RE5 was all about lumping plot device weaknesses onto him so they could kill him off. Hell, even in cutscenes in RE5 outside in low light he's fine.
That being said, Butz and a Robot are god slayers on the level of Lara and Vivi. They probably have this.
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If you wake up at a different time, in a different place, could you wake up as a different person? [HERO'S PLUNGE]
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