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Upon close inspection, the yellow shade of both eyes are found to no be the very same hue. We likewise examined the colour of Undyne’s magic and also Sans’ eye because both are a blue color. If they show up to it is in similar, the blue hue in Sans’ eye is not found in her magic spears.

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Is this distinction in color enough to disprove the eye connection? We think so. Color has essential significance, as seen in Flowey and also Asriel’s case.

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It is additionally noteworthy to cite that Sans’ eye colors execute not complement his magic attacks. But that’s a no issue. As stated in his reference sheet, his eye only ever flashes at three points in his battle, which means his eye is not needed for (and i can not qualify the resource of) his magic. It’s most likely that his flashing eye is just an clues of overexertion as it is seen really briefly in ~ the begin (possibly because he starts with a powerful attack first) and also at the end.

If Sans doesn’t have Undyne’s absent eye, climate why does he have actually this eye in the an initial place? Why doesn’t Papyrus likewise have magic eye(s)? possibly Papyrus does. After ~ all, both Papyrus and Sans share the exact same bone attacks, blue magic, and Gaster Blasters. Us never gain to watch Papyrus usage his Gaster Blasters, however this is hinted through the non-bone strike he refuses to use versus Frisk and the attack he would have used in Genocide, if offered the chance.

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As formerly stated, Sans’ magic eye appears and also flashes at points that overexertion throughout his battle. When Papyrus fights you, he isn’t overexerting himself, even if the *huffs* in ~ the end. ~ the battle, that is rapid to recover and also even runs off and jumps (floats?) end Frisk’s head. Papyrus is depicted as a skeleton through boundless energy and enthusiasm, particularly with his insistence that sleeps space unnecessary naps.Moreover, Papyrus has actually his own collection of anime and wacky eyes that he expresses himself with. These might be the occupational of his magic, and also different circumstances could manifest different eyes.

See more: See And Learn Letters, Sounds & Words, See And Learn

There is much an enig behind Sans and also Undyne’s eye situations. However, through what (little) information is provided by the game, we can only conclude the there is no connection in between these two.