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Dynamic astigmatism detector for crystalline lens and detecting method

A detection device and lens technology, which are used in refractometers, eye testing equipment, medical science, etc., can solve problems such as astigmatism that cannot be directly detected, and achieve the effects of convenient use, simple operation methods, and simple detection equipment.

Inactive Publication Date: 2006-08-23
孙永欣
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Problems solved by technology

Currently, there are many methods for examining corneal astigmatism. The lens is located in the eye, and astigmatism cannot be detected directly, only through indirect methods.

Method used

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  • Dynamic astigmatism detector for crystalline lens and detecting method
  • Dynamic astigmatism detector for crystalline lens and detecting method
  • Dynamic astigmatism detector for crystalline lens and detecting method

Examples

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Embodiment Construction

[0016] 1. The retinal retinoscopy optometry of the eye to be inspected, and the total astigmatism was detected. Application of keratometer or corneal topography to detect corneal astigmatism. Calculate the near point, far point, intermediate point and adjustment range, and the degree of convex lens that should be worn at a distance of 40cm;

[0017] 2. Keep your eyes 40cm away from the computer screen, and observe the near eye chart on the left side of the static picture figure 1 , measure visual acuity, and then look at the astigmatism diagram on the right figure 2 Measure the astigmatism and axial position with Figure 3;

[0018] 3. Change static pictures to dynamic pictures and watch Figure 4 Dynamic picture for 40 seconds, elicit adjustment, and then watch the astigmatism diagram on the right Figure 5 , respectively measure the astigmatism and axial position of the far point, near point, and middle point at this time; transform another dynamic picture with a differe...

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Abstract

The present invention discloses dynamic detector and detecting method for astigmatism of crystalline lens. Dynamic pictures with changeable colors and patterns and astigmatism pattern for astigmatism measurement are shown on the screen and dynamic astigmatism of crystalline lens is induced through the observation of eyes to the screen. By means of observing the astigmatism pattern and matching with the detection with slit lens, the dynamic astigmatism of crystalline lens for different colors and different distances are detected. The detector of the present invention can detect the dynamic astigmatism of crystalline lens accurately, and the detection method is simple in operation. The present invention is especially suitable for detecting the corrected diopter of computer operator.

Description

technical field [0001] The invention relates to the technical field of eye astigmatism detection, in particular to a detection device and method for lens dynamic astigmatism. Background technique [0002] Light rays entering the eye cannot form a focal point on the retina, and this refractive state of the eye is called astigmatism. Astigmatism is divided into corneal astigmatism and lens astigmatism. The sum of the two is the total astigmatism (except for corneal compliance and lens irregularity). The cornea is located on the surface of the eye and is easy to examine. Currently, there are many methods for examining corneal astigmatism. The lens is located in the eye, and astigmatism cannot be detected directly, only through indirect methods. Lens astigmatism is divided into static lens astigmatism and dynamic lens astigmatism. Static lens astigmatism can be obtained by summing astigmatism - corneal astigmatism. The detection of dynamic lens astigmatism is still blank in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/036A61B3/032A61B3/103
Inventor 孙永欣王巾董庆龙郭大光
Owner 孙永欣
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