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Sentence 1:

Punting slowly across the canal, I turned my torch on, eyes focusing on the ripples ahead.

Sentence 2:

Punting slowly across the canal, I turned my torch on, eyes focused on the ripples ahead.

Sentence 1 is present participle, indicating active voice

Sentence 2 is past participle, indicating passive voice

Which is grammatically correct? The eyes are focusing, so I assume it is active voice, but both seem correct to my ears.

If both are correct, why? Is there a difference in meaning?

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Comments  (Page 2) 
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I would have thought this was a comma splice; that is, two main clauses are joined by a comma (rested is a finite verb in the past tense).
It can be taken either way; I take it as a nonfinite participle.
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