Equipment for modeling the structure of the eye

A technology for optical components and beams, applied in the field of eye modeling, to solve problems such as refractive index failure

Active Publication Date: 2016-11-30
ALCON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Failure to resolve the refractive index leads to errors in all measurements beyond the first optical surface (cornea)

Method used

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  • Equipment for modeling the structure of the eye
  • Equipment for modeling the structure of the eye
  • Equipment for modeling the structure of the eye

Examples

Experimental program
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Embodiment Construction

[0076] Apparatus and methods for modeling one or more eye structures are described. Modeling will indicate the shape and / or location of eye structures, which can be determined using optical methods used to determine one or more ocular structures of interest, as well as structures in front of the ocular structures of interest. The one or more parameters include shape, thickness, distance and refractive index.

[0077] Measurements of either the shape, thickness, and / or refractive index of any ocular structure of interest will use the orientation of the light according to some measurement technique experienced by the light as it passes through the ocular structure in front of any ocular structure of interest Change the range on. Thus, depending on the technique, measurements of shape, thickness, and / or one aspect of the refractive index of an ocular structure are corrected as a basis for measuring the values ​​of other parameters of this structure, as well as any parameter of t...

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Abstract

an imaging system for an optical element, the imaging system comprising means for illuminating a target optical element with at least one incident beam and means for directing at least two beams returning from at least one surface of the optical element onto a detector; detecting The device is adapted to measure relative optical properties of the at least two return beams and to calculate at least one parameter of the optical element using the measured properties of the at least two return beams.

Description

technical field [0001] The present invention relates to eye modeling. Background technique [0002] Eye surgery typically modifies one or more structures of the eye, such as the cornea, lens, or retina. Some surgeries involve removing or replacing one or more eye structures, or adding a graft. For example, lens replacement surgery involves removing a patient's existing lens and replacing it with a new lens. Some procedures, such as laser vision correction surgery, do not remove or replace a patient's existing structures, or add implants in the eye, but reshape existing structures. Regardless of the modification made (eg, removal, replacement, insertion, or remodeling), the optical properties of the eye will change through the adjustments made to the structure of the eye. It is therefore necessary to determine the ocular parameters of the eye in order to accurately model any eye structure. These parameters include shape, thickness, and refractive index of ocular structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/10A61B3/107A61B3/14A61B3/135A61F9/008
Inventor E·恩格A·甘查拉夫P·柯林斯
Owner ALCON INC
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