Nothing causes instant damage. (See Into the Sun for an interesting take on it) The question then comes, how much exposure will damage your eyes. The Straight Dope has a very good article on this: Can laser pointers damage your eyes? As does Scientific American: Can a pocket laser damage the eye? The big take is that (until recently) the most powerful laser pointers available would cause you to blink before it would do damage to your eyes (about 0.25s).
Importance of the sun. - Sun = ultimate source of E for all organisms-The energy from sunlight is stored in the chemical bonds of molecules. - When these bonds are broken, energy is released-Same for all fuel sources (food, fossil fuel, biofuel).
The Solar Source of the Earth's Energy. Almost all of the energy that drives the various systems (climate systems, ecosystems, hydrologic systems, etc.) found on the Earth originates from the Sun.Solar energy is created at the core of the Sun when hydrogen atoms are fused into helium by nuclear fusion.he Solar Source of the Earth's Energy. Almost all of the energy that drives the various systems (climate systems, ecosystems, hydrologic systems, etc.) found on the Earth originates from the Sun.