System and method for laser treatment of ocular tissue using non-collinear imaging

A focusing objective head for coupling to a patient interface having a window configured to couple to a cornea of an eye, the eye having an optical axis, an anterior chamber, and an irido-corneal angle, the focusing objective head comprising:

• an exit lens configured to optically couple to the window of the patient interface to align an axis of the exit lens with the optical axis of the eye;
• and
• a prism mechanically and optically coupled to the exit lens,
• wherein the prism and the exit lens form an optical assembly configured to:
• receive an OCT beam along an OCT input axis incident to an entry face of the prism, and to direct the OCT beam to an OCT output axis that:
• 1) is substantially parallel to the axis of the exit lens, 2) is radially offset from the axis of the exit lens, and 3) extends through the exit lens into the cornea and into a portion of the irido-corneal angle, and
• receive a laser beam along a laser input axis incident to an entry surface of the exit lens, and to direct the laser beam along an angled optical path through the exit lens, through the cornea, through the anterior chamber, and into a target volume of ocular tissue in the portion of the irido-corneal angle.