Home ยป The part of light which expands or contracts when light of more or less intensity strikes on eye is Eye MCQs The part of light which expands or contracts when light of more or less intensity strikes on eye is February 12, 2022 26 Views Q. The part of light which expands or contracts when light of more or less intensity strikes on eye A. sclera B. pupil C. iris D. retina Answer: pupil