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US 8,556,425 B2Granted
Purkinjie image-based alignment of suction ring in ophthalmic applications
AssigneeLensar, Inc.
InventorsRudolph W. Frey, Steven E. Bott
Life of this patent
Estimating the term…
Abstract
An alignment device including means for releasably attaching a suction ring and means for applying a pattern of light to an eye of a patient. The alignment device further including means for detecting light reflected from the eye and determining whether the suction ring is aligned relative to the eye based on the detected light.
Claims24
An alignment device comprising:
- means for releasably attaching a suction ring;
- means for applying a pattern of light to an eye of a patient;
- and
- means for detecting light reflected from said eye and determining whether said suction ring is aligned relative to said eye based on said detected light, wherein said detecting comprises detecting an image from the group consisting of reflection from a posterior lens surface of said eye, reflection from an anterior cornea surface of said eye and reflection of an anterior crystalline lens surface.
1 more element
An alignment device comprising:
- a housing comprising a mechanism that releasably engages a suction ring;
- a light source comprising multiple light emitters that are arranged in a pattern so that the light emitters apply light in a said pattern of light to an eye of a patient;
- and
- a detector that detects light reflected from said eye and determines whether said suction ring is centered on said eye based on said detected light, wherein said light detected by said detector comprises an image from the group consisting of reflection from a posterior lens surface of said eye, reflection from an anterior cornea surface of said eye and reflection of an anterior crystalline lens surface.
1 more element
A method of aligning a suction ring on an eye, the method comprising:
- positioning a suction ring over an eye of a patient;
- applying a pattern of light to said eye, wherein said pattern of light is generated from multiple light emitters;
- and
- detecting light reflected from said eye and determining whether said suction ring is aligned relative to said eye based on said detected light, wherein said detecting comprises detecting an image from the group consisting of reflection from a posterior lens surface of said eye, reflection from an anterior cornea surface of said eye and reflection of an anterior crystalline lens surface.
1 more element
Dependencies are inferred from the claim text.