Visual changes to the Capitol (7)

I believe the answer is:

optical

'visual' is the definition.
(I know that visual can be written as optical)

'changes to the capitol' is the wordplay.
'changes to' is an anagram indicator (I've seen 'change to' mean this).
'capitol' is an anagram of 'OPTICAL'.

(Other definitions for optical that I've seen before include "Visual" , "Concerning sight" , "Sighted" , "Topical (anag.)" , "Relating to vision and light" .)

I've seen this clue in The Globe and Mail.

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