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Cornea surface morphology measuring device and method

A corneal surface and measuring device technology, applied in the field of medical examination, can solve the problems of difficulty in obtaining corneal topography, cumbersome measurement process, etc., and achieve the effects of convenient screening, simple and fast operation, and low coordination requirements

Active Publication Date: 2021-06-25
东北大学秦皇岛分校
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] However, due to the cumbersome measurement process of the existing corneal topography instrument, high requirements on the eye state of the subject and the high cooperation of the subject, it is difficult to obtain an accurate corneal topography for children who cannot maintain a fixed posture and cooperate with the measurement

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  • Cornea surface morphology measuring device and method
  • Cornea surface morphology measuring device and method
  • Cornea surface morphology measuring device and method

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Embodiment Construction

[0042] The invention will be further described below in conjunction with the accompanying drawings and specific implementation examples. This method does not require corneal center alignment. Compared with the current method, the operation is simple and quick, and the requirements for the cooperation of infants and young children are relatively low.

[0043] like figure 1As shown, a corneal surface morphology measurement device includes two cameras I, camera II, a point matrix light source, a calculation processing module, and a display module, and the camera I, camera II, and point matrix light source are respectively electrically connected to the calculation processing module, The computing processing module is electrically connected to the display module;

[0044] The dot matrix light source is used to emit dot matrix light, forming a dot matrix light spot on the surface of the cornea as a target point;

[0045] The camera is used to take images of the cornea with dotted l...

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Abstract

The invention provides a cornea surface morphology measuring device and method. The cornea surface morphology measuring method comprises the steps that firstly, a cornea image containing dot matrix light spots is obtained through a binocular camera system, then three-dimensional coordinates of each measuring point are calculated through coordinate conversion, and all the three-dimensional coordinate points are subjected to a curved surface fitting method to obtain an approximate spherical surface where the cornea is located; finally, the Gaussian diopter at each measuring point is calculated, and a data field interpolation method, color coding and other operations are combined to generate the corneal topographic map. According to the invention, the Gaussian diopter of the corneal vertex position does not need to be determined to serve as a numerical form of the corneal topographic map, corneal center alignment does not need to be conducted, and compared with an existing method, the operation is easy and convenient; the invention is low in cooperating requirement for infants; the device can be integrated into a handheld end, is suitable for cornea detection of the infants, and facilitates screening of early eye diseases.

Description

technical field [0001] The invention relates to the technical field of medical examination, in particular to a corneal surface morphology measurement device and method. Background technique [0002] In recent years, corneal morphology measurement has become an important part of optometry research and clinical application. Corneal topography is a digital analysis of corneal morphology through a computer image processing system, and the obtained information is displayed as a color map with different characteristics. Because it looks like the ups and downs of the topographic surface in geography, it is called corneal topography. It can accurately measure and analyze the curvature of any point on the front surface of the whole cornea, and detect the refractive power of the cornea. It is a method for studying the shape of the front surface of the cornea. Systematic and comprehensive quantitative analysis methods. Corneal topography is used in the diagnosis of corneal astigmatism...

Claims

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Application Information

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IPC IPC(8): G06T7/80G06T7/66G06T5/00G06T15/04G06T17/20A61B3/107A61B3/14
CPCG06T7/85G06T7/66G06T17/20G06T15/04A61B3/107A61B3/14G06T2207/30041G06T2200/04G06T5/80
Inventor 全禹臣王毅陈思佳陈悦江张雨珂
Owner 东北大学秦皇岛分校
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