He's treading uneasily, unable to see clearly (4-7)

I believe the answer is:

near-sighted

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'unable to see clearly' is the definition.
I can't judge whether this defines the answer.

'he's treading uneasily' is the wordplay.
'uneasily' indicates an anagram.
'hes'+'treading'='hestreading'
'hestreading' is an anagram of 'NEAR-SIGHTED'.

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(Other definitions for near-sighted that I've seen before include "Showing lack of vision" , "Myopic" .)

I've seen this clue in The Times.

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