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.
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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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Description
Claims
Application Information
- IPC
- A61B3/036; A61B3/032; A61B3/103
- Inventors
- 孙永欣; 王巾