CPC A61B 3/102 (2013.01) [G01B 9/02091 (2013.01); G01B 2290/45 (2013.01)] | 19 Claims |
1. A system measuring a change in a refractive error of an eye, the system comprising:
a swept light source to generate a light beam and vary a wavelength of the light beam;
a scanner comprising a mirror coupled to the swept light source to simultaneously scan a measurement beam along a corneal zone of the eye and a retinal zone of the eye;
an interferometer coupled to the swept light source and the scanner, the interferometer comprising a measurement optical path and a reference optical path to generate a first plurality of A-scans of the corneal zone and the retinal zone at a first time and a second plurality of A-scans of the corneal zone and the retinal zone at a second time, wherein the first plurality of A-scans and the second plurality of A-scans are generated with a zero point of the measurement optical path and the reference optical path located between a lens of the eye and a retina of the eye;
a detector coupled to the interferometer to receive the first plurality of A-scans and the second plurality of A-scans from the interferometer; and
a processor coupled to the detector, the processor configured with instructions to determine a first axial length of the eye in response to the first plurality of A-scans, a second axial length of the eye from the second plurality of A-scans, and the change in refractive error in the eye, wherein the change in refractive error corresponds to a difference between the first axial length and the second axial length.
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