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Fixation and how to use it

An optotype and user technology, which is applied in the field of gaze optotypes and the use of gaze optotypes, and can solve problems such as large errors in measurement results.

Inactive Publication Date: 2015-08-05
王涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the subject does not necessarily know the difference between "seeing" and "gazing". When reporting "gazing" at the point light source 1, it may only "see" the point light source 1, resulting in large errors in the measurement results

Method used

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  • Fixation and how to use it
  • Fixation and how to use it
  • Fixation and how to use it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The present invention will be described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.

[0017] Look at the sight mark, such as figure 2 As shown, it includes: a point light source 1 and a cylindrical body 6; the point light source 1 is set at one end of the cylindrical body 6; the other end of the cylindrical body 6 is open.

[0018] In the above-mentioned embodiments of the present invention, by arranging the cylindrical body 6, the line of sight of the subject needs to pass through one end of the opening of the cylindrical body 6 to see the point light source 1 located at the other closed end, that is, to make the detected The gaze axis 3 of the subject is forced to be located inside the cylindrical body 6, so that when the subject reports gazing at the visual mark, he really "watches" the visual mark instead of "seeing" the visual mark, so that the deviation of the measurement result is small.

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PUM

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Abstract

The invention relates to the field of measurement or inspection in the ophthalmology department, and in particular relates to a watching sighting mark and a method for using the same. The watching sighting mark comprises a spot light source and a cylinder body, wherein the spot light source is arranged at one end of the cylinder body, and the other end of the cylinder body is opened. The method for using the watching sighting mark is that the sight of a person to be inspected is guided by the cylinder body to focus on the spot light source inside the cylinder body. According to the watching sighting mark and the method for using the same, the person to be inspected can see the spot light source at one closed end from the other opening end of the cylinder body, namely, the watching axis of the person to be inspected is compulsorily positioned inside the cylinder body, so that the person to be inspected indeed watches the sighting mark rather than seeing the sighting mark when reporting the situation of watching the sighting mark, and the deviation of a measurement result is small.

Description

technical field [0001] The invention relates to the field of measurement or detection of ophthalmology, in particular to a fixation target and a method for using the fixation target. Background technique [0002] An optotype is a device used in ophthalmology for measurement or detection. It is usually used to measure the eye axis, strabismus, room angle or intraocular lens inclination angle of the subject. [0003] In related technologies, a continuously bright or flashing red point light source is usually used as a fixation target. When performing ophthalmology measurement or detection, the tester will ask the subject to fixate on the target and answer whether to fix it, and the tester will report whether to fix it. [0004] Due to related technologies when doing ophthalmological measurement or detection, such as figure 1 As shown, point light source 1 is used as the visual target. When the subject looks at the point light source, the line between the point light source 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/08A61B3/02
Inventor 王涛
Owner 王涛