You shouldn't look directly at a partial eclipse because of the damage that can be caused by improperly aligning the solar-lunar orbital plane with the orbital bones around your eye.

"Earth Orbital Diagram", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License

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You shouldn't look directly at a partial eclipse because of the damage that can be caused by improperly aligning the solar-lunar orbital plane with the orbital bones around your eye.