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Peripheral retina aberration optical measurement system based on Hartmann-Shack wave front aberration measuring instrument

An optical measurement system and wavefront aberration technology, applied in medical science, eye testing equipment, diagnosis, etc., can solve the problems of complex measurement methods of aberrometers, time-consuming data analysis, etc., to achieve consistent illuminance and eliminate interference conditions Effect

Pending Publication Date: 2020-05-08
TIANJIN EYE HOSPITAL OPTOMETRIC DEPT
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Problems solved by technology

Early aberrometer measurement methods were complicated and data analysis was time-consuming

Method used

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  • Peripheral retina aberration optical measurement system based on Hartmann-Shack wave front aberration measuring instrument
  • Peripheral retina aberration optical measurement system based on Hartmann-Shack wave front aberration measuring instrument
  • Peripheral retina aberration optical measurement system based on Hartmann-Shack wave front aberration measuring instrument

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Embodiment

[0089] A method of using the device based on the Hartmann–Shack wavefront aberration measuring instrument peripheral retinal aberration optical measurement system of the present invention is:

[0090] The device is operated in a dark room.

[0091] First of all, carry out center positioning, start the Hartmann–Shack wavefront aberration measuring instrument 1. The debugger sits on the stool 6 and looks at the built-in optotype of the Hartmann–Shack wavefront aberration measuring instrument 1. The pupil axis is in line with the Hartmann–Shack wavefront Align the optical path of the aberration measuring instrument 1; rotate the height adjustment knob 12 with one hand and rotate the support platform 9 with the other hand so that the external visual target field 3 and the built-in visual target appear in the field of view at the same time; by controlling the adjustment platform (7, 8, 9) to adjust the angle and position of the beam splitter 2 so that the center point of the built-...

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Abstract

The invention relates to a large-field-of-view aberration optical objective measurement method based on a Hartmann-Shack wave front aberration measuring system (HSWS). The method adopts a method of combining internal sighting mark and beam splitter off-axis watching to objectively measure aberration at corresponding field-of-view of multiple horizontal and vertical intersected meridians, the measurement process of peripheral aberration is based on eyeball rotation of a subject, and an aberration instrument and wave front are kept parallel in the process. The environmental illumination and measurement accuracy are calibrated, and an aberration calculation method is improved to express and calculate peripheral aberration with a Zernike polynomial. The method can realize measurement of off-axis large-field-of-view high-order aberration, and provides a reliable and convenient measurement means to understand composition and distribution laws of off-axis large-field-of-view high-order aberration of human eyes.

Description

technical field [0001] The invention relates to the technical field of human eye aberration measurement, in particular to a peripheral retinal aberration optical measurement system based on a Hartmann-Shack wavefront aberration measuring instrument. Background technique [0002] As the application of modern physical optics theory in astronomy, wavefront aberration has been gradually introduced into the field of evaluation and correction of human visual optics, and has experienced a development process from measurable, assessable, and correctable. The measurement of wavefront aberration of the human eye has gone through a complicated development process from simple laboratory research in the early days to being used as a routine inspection method in vision correction, especially corneal refractive surgery. Early aberrometer measurement methods were complicated and data analysis was time-consuming. With the updating of technology, existing instruments can realize high-speed r...

Claims

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Application Information

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IPC IPC(8): A61B3/10A61B3/14
CPCA61B3/1015A61B3/14
Inventor 张琳王雁
Owner TIANJIN EYE HOSPITAL OPTOMETRIC DEPT
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