Patent ID: 8506083

Claim:
A wavefront sensor module configured to be attached to or integrated with an ophthalmic instrument for eye examination and/or vision correction procedures where the working distance of the ophthalmic instrument is the distance between a light input window and a subject eye, with the wavefront sensor module having oppositely disposed first and second surfaces and an interior, with the first surface having a first optical window configured to pass light between the interior of the wavefront sensor module and a subject eye and with the second surface having a second optical window configured to pass light between the interior of the wavefront sensor module and the ophthalmic instrument, where the first and second optical windows are aligned to form an optical path to pass light between a subject eye and the ophthalmic instrument via the interior of the wavefront sensor module and with the wavefront sensor module comprising: a front lens, being the first lens of a wavefront relay, disposed substantially at the first optical window of the wavefront sensor module and oriented substantially perpendicular to the optical path, with the front lens configured to focus light returned from a subject eye and to transmit the light along the optical path; a beam splitter/combiner disposed along the optical path to intercept light transmitted by the front lens, with the beam splitter/combiner configured to transmit at least a portion of the light returned from the subject eye meant for the ophthalmic instrument, and to reflect at least a wavefront beam returned from the subject eye to the interior of the wavefront sensor module; and a compensating lens disposed substantially at the second optical window and configured to compensate the influence of the front lens on the light returned from the subject eye meant for the ophthalmic instrument.