Photodisruption
Photodisruption is a form of minimally invasive surgery used in ophthalmology, utilizing infrared Nd:YAG lasers to form plasma ("lightening bolt"), which then causes acoustic shock waves ("thunderclap") which then in turn affects tissue.
Because the infrared laser is invisible to the surgeon's eye, typically a companion HeNe laser is used in conjunction. However, the eye lens acts as a prism, so the infrared light bends at a shallower angle than the red light, causing chromatic aberration. This means the area highlighted by the HeNe laser is not precisely the area being affected Nd:YAG laser, and therefore some surgical lasers have an added adjustment to compensate.