From Theodore Maiman’s small ruby laser to ultrafast Ti:Sapphire laser technology, a solid state laser technology revolution, earning important roles in scientific research, engineering, medicine, materials working, and a host of other applications. Laser is a special light with variable wavelength and variable effect on different structures of the eyeball. The effects include ablation, disruption and coagulation. According to the wavelength and effects, the lasers can be grouped as Green laser, YAG laser, Excimer Laser and CO2 Laser. These Lasers are used for different disorders of the eye which range from disorders of the ocular surface to the disorders deep inside the eyeball including retina. There are many diseases which used to remain untreated or had interventrial and surgical treatments. Most of them can now be treated with ease and comfort on day care basis not requiring admission and hospitalization. The Physics, delivery system, uses, effects and after effects of lasers will be covered in the presentation.