Reflect off or reflect on

Which is correct?

I could see myself reflected in his eyes.

I could see the reflection of my self in his eyes.

Are both correct?

I could see the light reflected in his eyes.

His eyes reflected the light.

What does the “is” do? Is it optional? Would you say off or on?

The light (is) reflected off/on his tooth in the scene.

Which is correct?

The https://dictionary.cambridge.org/dictionary/english/light reflected off the https://dictionary.cambridge.org/dictionary/english/surface of the https://dictionary.cambridge.org/dictionary/english/water .

The surface of the water reflected the light.

The https://dictionary.cambridge.org/dictionary/english/candlelight reflected on his https://dictionary.cambridge.org/dictionary/english/gold https://dictionary.cambridge.org/dictionary/english/wristwatch .

The gold wristwatch reflected the candlelight.

Thanks