Y'see, here's the problem... you haven't provided the example so your question is meaningless.
Words is not a euphemism.
A euphemism is a nice way of saying something...
The English term 'euphemism' means an inoffensive or indirect expression that is substituted for one that is considered offensive or too harsh
"visually impaired" or "visually challenged" but there's no real reason to use one, if someone is 100% blind.