Which one of the following will cause blindness on consumption?
-
glycerin
-
kerosene
-
vinegar
-
methyl benzene
-
methyl alcohol
E
Correct answer
Explanation
Methyl alcohol (methanol) causes permanent blindness when consumed because it metabolizes into formaldehyde and formic acid in the body. These toxic compounds damage the optic nerve, leading to irreversible vision loss. This is why methanol poisoning is extremely dangerous.