Related Clues:

• Charged molecule
• Physics class topic
• Sci-fi ''beam'' weapon
• + or - particle
• "Star Wars" weapon
• Vision-correcting aid
• Electrojet bit
• Particle in a salt solution
• E.g. surgical light-beam
• Source of light; type of printer
• What leads in lens and surgical eye repairs
• Failure needs a second type of surgery
• No live wire, we hear, in this scientific device
• At start of series, left a beamer
• Intense light generator