Check out German girls as they help people to read (10)

I believe the answer is:

eyeglasses

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'they help people to read' is the definition.
The definition suggests an adverb but the answer is not.

'check out german girls' is the wordplay.
'check out' becomes 'eye' (I've seen this in another clue).
'german' becomes 'g' (abbreviation).
'girls' becomes 'lasses' (lass can informally mean a girl).
'eye'+'g'+'lasses'='EYEGLASSES'

'as' acts as a link.

Can you help me to learn more?

I've seen this clue in The Independent.

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