In the early 1960s, the laser was an invention looking for an application. In other words, the laser now is a common tool. Like most other tools, lasers are capable of causing injury to their operators and others, if used improperly.
Laser light is highly directional, in a tight beam.
Because of the directionality and collimation, laser beams can be very powerful. Laser beams tend to be small in diameter, often 1 mm or less. The space between the cornea and lens is filled with a watery liquid known as the aqueous humor , and the interior of the eyeball is filled with the jelly-like vitreous humor . The retina is the screen upon which the cornea and lens project an image of the outside world. The fovea is the seat of sharp vision.