Optics
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
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2
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4
Check
Across:
1.
A circular muscle that enables the lens to change shape for focusing
4.
A layer of blood vessels that nourishes the eye
Down:
1.
A lens that makes light spread apart
2.
A lens that makes light rays come together
3.
A point where no image is formed after the refraction of light
OK