System and method for photoablation using multiple focal points using cyclical phase modulation

A system for dispersing focal spots on a spiral path through a treatment area during ophthalmic laser surgery which comprises:

• a means for focusing a plurality of laser beams to create a pattern of focal spots;
• a means for moving the pattern of focal spots along a predetermined path through a target area for performing laser induced optical breakdown (LIOB) of tissue at sequential LIOB locations in the target area;
• and
• a means for varying the speed of the pattern along the path to achieve a substantially homogeneous dispersion of the LIOB locations.

A method for dispersing focal spots on a spiral path through a treatment area during ophthalmic laser surgery which comprises the steps of:

• generating a primary laser beam;
• splitting the primary laser beam into a plurality of secondary laser beams;
• focusing the plurality of secondary laser beams into a pattern of respective focal points;
• scanning the pattern of focal points along the spiral path;
• and
• moving the pattern of focal points along the spiral path in accordance with a routine having a phase modulated angular velocity.