A system for imaging and treating a lens of an eye, the system comprising: a single laser configured to produce a laser beam having a first laser beam power, wherein the laser beam power is above a laser induced optical breakdown threshold of a natural crystalline lens of an eye; a laser optics assembly comprising a beam splitter , a z focus mechanism , an x-y scanner , a laser range detector and focusing optics , wherein the laser and the laser optics assembly are arranged in the system to direct the laser beam along a first laser beam path, the first laser beam path extending from the laser through the beam splitter, the z focus mechanism, the x-y scanner and toward the eye; an attenuator movable between a first position and a second position , wherein in the first position the attenuator is positioned in the first laser beam path between the laser and the beam splitter and, in the second position the attenuator is removed from the first laser beam path, wherein the attenuator in the first position reduces the power of the laser beam to less than the laser induced optical breakdown threshold; wherein the laser range detector is configured to receive a reflection of the laser beam along a second laser beam path extending from the eye through the x-y scanner, the beam splitter and to the range detector with the attenuator in the first position, wherein the laser range detector is configured to detect a position of an outer surface of the lens based on a pattern in the reflection beam indicating a transition from the lens's capsule to the outer surface; and, a control system , wherein the control system is configured to control the z focus mechanism and the x-y scanner to create a 3-D map of the outer surface of the lens based on the reflection of the laser beam with the attenuator in the first position, and to guide the laser beam in the lens based on the 3-D map with the attenuator in the second position. a single laser configured to produce a laser beam having a first laser beam power, wherein the laser beam power is above a laser induced optical breakdown threshold of a natural crystalline lens of an eye; a laser optics assembly comprising a beam splitter , a z focus mechanism , an x-y scanner , a laser range detector and focusing optics , wherein the laser and the laser optics assembly are arranged in the system to direct the laser beam along a first laser beam path, the first laser beam path extending from the laser through the beam splitter, the z focus mechanism, the x-y scanner and toward the eye; an attenuator movable between a first position and a second position , wherein in the first position the attenuator is positioned in the first laser beam path between the laser and the beam splitter and, in the second position the attenuator is removed from the first laser beam path, wherein the attenuator in the first position reduces the power of the laser beam to less than the laser induced optical breakdown threshold; wherein the laser range detector is configured to receive a reflection of the laser beam along a second laser beam path extending from the eye through the x-y scanner, the beam splitter and to the range detector with the attenuator in the first position, wherein the laser range detector is configured to detect a position of an outer surface of the lens based on a pattern in the reflection beam indicating a transition from the lens's capsule to the outer surface; and, a control system , wherein the control system is configured to control the z focus mechanism and the x-y scanner to create a 3-D map of the outer surface of the lens based on the reflection of the laser beam with the attenuator in the first position, and to guide the laser beam in the lens based on the 3-D map with the attenuator in the second position. <EOS>