The focal length of the eye lens is changed by which muscles?
ACardiac
BCranial
CCostal
DCiliary
Answer & Solution
Correct answer: D. Ciliary
1. They act on the lens itself.
2. They contract when you look at a near object.
3. They are the ciliary muscles.
_Source: NCERT Class 10 Science, Ch 11 'The Human Eye and the Colourful World'_
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