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US 8,128,228 B2Granted
Devices and methods for measuring axial distances
AssigneeWF Systems, LLC
InventorAnthony Y. Van Heugten
Life of this patent
Estimating the term…
Abstract
Axial distances between ocular structures can be measured by focusing an optical unit on focus planes corresponding to the ocular structures and using the distance between focus planes to determine the distance between the ocular structures. The method is particularly useful during eye surgery, e.g., cataract surgery, where the distance between ocular structures, particularly an aphakic pupil, can be used to more accurately predict the effective lens position for an intraocular lens.
Claims15
A method for measuring an axial distance, the method comprising:
- a. providing an optical unit capable of intraoperative use;
- b. focusing the optical unit on a first focus plane correlated to an at-rest pupil;
- c. refocusing the optical unit on a second focus plane correlated to a second ocular structure;
- d. detecting the distance between the first and second focus planes;
- e. using the distance between the first and second focus planes to calculate the distance between the at-rest pupil and the second ocular structure.
2 more elements
A method of eye surgery comprising:
- a. removing the natural lens of the eye;
- b. allowing the pupil of the eye to relax to an at-rest state;
- and
- c. measuring the distance between the at-rest pupil and a second ocular structure.
1 more element
Dependencies are inferred from the claim text.