Full of such blind rage I need a seein' eye dog
“Blind rage” means that your anger is not directed at any one person; it just sprays and sprays in no particular direction. But he takes the phrase literally here, and says that his rage has made him so blind that he needs a seeing eye dog to get by.
Eminem also delivers the line in such a way that it can be heard as “I need to see an eye doc”. Both make sense in this context.
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