They are not the real eyes
Eyes need a pupil to see, and that pupil must absorb light, meaning it will be black. But that doesn't mean you can't have a creature that looks like it has glowing eyes.
Exhibit A, the flashlightfish:
Looks an awful lot like pupil-less glowing eyes, doesn't it? But the glowing organs are not the real eyes. The real eyes are the dark circles above the glowy bits. In the dark, of course, you can hardly notice the real eyes.
They use the glowing organs to see, and also to signal each other (they can turn them on and off quickly). They have to be careful though, since the lights can make them visible to predators.
Fun fact about deep-sea bioluminescence: most bioluminescent sea creatures use the same few species of bacteria, which exist in the ecosystem. Animals that evolved a suitable pouch to breed these bacteria have the ability to use them as light sources, even though the animals are not related to each other. A similar bacterium might evolve on land and be utilized by land animals; evolutionary pressure just hasn't been strong enough for bioluminescence to become widespread among land-dwellers, though there are of course a few exceptions like fireflies (which are often yellow).
I'd expect a large bioluminescent land animal to be a social pack-hunter, like wolves - they can use their glowing organs not only to see in the dark, but also to signal each other silently and coordinate their attacks at night.