The most common and most likely answer to this crossword clue is the 7 letter word OCULIST
I've seen this crossword clue in The Daily Telegraph
O
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More clues leading to the result OCULIST
- Regularly touch up lean person who looks you in the eye
- Clout is misplaced in viewing authority?
- One who has an understanding of vision is brought in by old religious group
- One studying vision of love is taken in by sect
- Someone who sees what you can see
- Copper, smothered in crude oil on street, is seeing specialist
- I want you to see nothing is being concealed by group
- Ophthalmologist's tip to succeed — focus endlessly
- Engineer cuts oil or Doctor?
- Eye specialist’s clout is slipping
Buddy explains!

The straight part
We know that "Someone who sees what you can see" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case someone who sees what you can see = oculist.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does OCULIST mean?
OCULIST noun- An ophthalmologist
- An optometrist