What causes a pig to suddenly go blind

This pig weighs about 40 jin. When it was fed in the morning, everything was normal. By the evening feeding, its eyes had become like this. It eats the same feed, it's just that the eyes cannot see. What's strange is why the pig's eyes became like this in such a short time. What on earth caused it? I hope everyone can give some guidance, thank you!

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Could it be caused by trauma?
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Reply 2# Angel's Smile


It was not caused by trauma, and there were no signs of fighting. I have seen a pig like this before
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Never seen it, experts come out and give some guidance.
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Never seen it, looking forward to an expert appearing to point the way
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Pretty terrifying
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Could it be a stye?
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Never seen it, waiting for an expert
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Too terrifying. Could it have been stimulated by something? Strong light or strong toxic gas stimulation? Or could someone have deliberately injured the pig's eyeballs??
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It is indeed strange, experts come and point the way!
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Just this one case!!
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Seeing this for the first time.. does anyone have a picture of a stye.. post it so we can look.. compare..