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System for movement tracking of spherical object

A target, spherical technology, used in eye testing equipment, medical science, diagnosis, etc., can solve the problems of inaccurate recording of measurement parameters, inability to achieve optimal vision correction, etc., and achieve the effect of easy tracking

Inactive Publication Date: 2009-04-29
BAUSCH & LOMB INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Voluntary or involuntary eye movements may cause specific measurement parameters to be recorded inaccurately, resulting in suboptimal visual correction

Method used

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  • System for movement tracking of spherical object
  • System for movement tracking of spherical object
  • System for movement tracking of spherical object

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Embodiment Construction

[0016] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which the same reference numerals denote the same elements.

[0017] figure 1 A preferred embodiment of the system 100 is shown for monitoring the spatial position of the corneal surface 104 of a patient's eye and tracking the movement of the corneal surface 104 . figure 1 Also reflected is an image registration system 100 for multiple images of spherical or quasi-spherical object surfaces such as the cornea of ​​the eye. System and device 100 generally includes projection element 102 (shown in FIG. 2 ), image capture element 120 , and computing element 160 operably connected to image capture element 120 . As shown in Figures 2a and b, the projection element 102 includes at least one light emitting element 110 and the projection element projects at least 4 light spots 112a-d onto a surface 104 (spherical or quasi-spherical). As shown at 111 in Figure ...

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Abstract

A system for registering a series of video images of a spherical or quasi-spherical surface target based on projections on at least four diffused scan points on the surface, in a preferred angular manner, and monitoring said spots relative to the Image motion of the reference image. A preferred target is the cornea of ​​the human eye.

Description

technical field [0001] The present invention relates to diagnostic image processing, and more particularly to an apparatus and system for localization and motion monitoring of spherical target surfaces, and to a system for detecting such motion and recording said target surface Method for a series of adjacent image frames. Background technique [0002] The first step in any kind of ophthalmic treatment is to diagnose the pathology of the eye and / or characterize its structure. In the field of refractive surgery for the correction of defective vision in a patient's eye, it is important to gather accurate information about the profile and pachymetry of the eye as well as the nature and extent of the deformation leading to poor vision. The collection of these diagnostic information usually requires the patient to interface with some type of instrument and observe the target steadily, while the diagnostic information is usually obtained through multiple video images obtained at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/113
CPCA61B3/113
Inventor 巴里·伊根劳埃德·M·考德威尔罗伯特·D·卡迪唐纳德·C·格罗夫格雷格·D·尼文灿·恩古延
Owner BAUSCH & LOMB INC