Each of Blinky's eyes, according to press accounts, saw the world differently, the left one having undergone an obscure trauma, either from a premature detonation during a box job or from a naval howitzer while fighting in the Rebellion.
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Not sure how Merle could tell this from Blinky's picture although I'm sure one eye must have been covered in a white film. Maybe the picture Merle is talking about which would be the picture Thomas Pynchon saw was the picture in my last blog post. And if you go by that picture, one eye is in the light and the other is recessed in darkness. Along with the rumors that Blinky's eye sees the world differently, Merle could have then come to the conclusion, skin covered in goose flesh, that Blinky somehow was seeing the world in a way that would prove the Michelson-Morley experiment a complete failure.
The idea that Blinky's eyes saw the world in different ways finally reveals that my speculation was probably correct in that the "principle" is that of Einstein's Theory of Relativity. Here we get the most compact and literal example of that theory: a man whose two eyes themselves act as separate observers, each seeing the same world but from different positions and perspectives.
"obscure trauma"
The literal reading of this line indicates that the actual story of the eye's trauma is unknown to all but Blinky. But this can also be read as a trauma caused by darkness. Meaning, you know, no light since light's super important to this book. Illumination can be read as knowledge as well. In other words, the trauma has hidden knowledge from the eye, leaving it in darkness, a metaphor for the current times not being able to yet see the reality of the physical universe.
"premature detonation during a box job"
I'm not sure what this means but I assume it means robbing a box car on a train or a bank vault. I suspect Pynchon chose the two examples of how the eye went for specific reasons but, again, I can only speculate. Could Blinky's vision of the unknown principle (seeing prematurely in a way he shouldn't) caused by a premature detonation be a hint at how the atomic bomb was made possible by Einstein's theory? According to how I'm perceiving history in this novel, I mean that literally. The atomic bomb would not exist until a new way of viewing the universe came into view and not Einstein's theory was especially needed for an atomic bomb.
"naval howitzer while fighting in the Rebellion"
We don't get a mention as to what side of the Rebellion Blinky fought on. But that doesn't matter. Pynchon simply takes the opportunity to remind the reader of the historical context of this story: just mere decades ago, a bunch of racists rose up to try to maintain ownership of Black Americans. Sure, some moronic imbeciles who are stupid love to claim the Rebellion was started for States Rights. But you know which right they wanted their own say in, yeah? Slavery, dumb-dumb.
Anyway, maybe this can be seen as Black versus White or, in other words, Dark versus Light (both in the color of the skin of the people at the center of the dispute and also the "dark" idea of keeping slaves versus the "light" of emancipation).
Double anyway, Blinky loses his eye through some sort of violent means and changes the way he sees the world forever. Rebellion. Detonation. Trauma. Look, Pynchon will get less subtle and metaphorical about these things once Lew gets to Colorado!