Ophthalmic range finding

A machine-readable medium having machine-executable instructions configured to perform a method for analyzing the ophthalmic anatomy of a patient posterior to the cornea, the method comprising:

• scanning a focus of a femtosecond laser beam along a path within the patient's eye, wherein at least a portion of the path is disposed posterior to the patient's cornea, and wherein the path includes a first location and a second location;
• acquiring a first reflectance image associated with the focus disposed at the first location;
• acquiring a second reflectance image associated with the focus disposed at the second location;
• and
• determining the presence or absence of an ophthalmic anatomical feature of the eye based on a comparison between the first reflectance image and the second reflectance image.

A system for analyzing the ophthalmic anatomy of an eye posterior to a cornea comprising:

• a femtosecond laser, wherein a plasma-generating focus of the femtosecond laser beam is scanned along a path within the eye, wherein at least a portion of the path is disposed posterior to the cornea, and wherein the path includes a first location and a second location;
• an acquiring device, wherein the acquiring device acquires a first reflectance image associated with the focus disposed at the first location, and wherein the acquiring device acquires a second reflectance image associated with the focus disposed at the second location;
• and
• a computing device communicatively coupled with the acquiring device, wherein the computing device determines the presence or absence of an ophthalmic anatomical feature of the eye based on a comparison between the first reflectance image and the second reflectance image.