Handheld independent vision measurement device and method

A measuring device and hand-held technology, applied in the field of hand-held autonomous vision measuring devices, can solve the problems of inaccurate measurement results, affecting the accuracy of vision correction, lack of professional skills, etc., and achieve convenient vision measurement, miniaturization, and portability. Effect

Active Publication Date: 2015-09-09
SUZHOU SIHAITONG INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For uncooperative subjects or measurers with insufficient professional skills, the actual measurement results will be inaccurate, which will directly affect the accuracy of vision correction when wearing glasses

Method used

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  • Handheld independent vision measurement device and method
  • Handheld independent vision measurement device and method
  • Handheld independent vision measurement device and method

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Embodiment Construction

[0035] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

[0036] figure 1 Shown is a hand-held autonomous vision measurement device of the present invention. combine figure 1 As shown, the visual acuity measurement device includes a first lens group 1, a second lens group 2, a first dichroic mirror 3, a first light source 4, a third lens group 5, a second dichroic mirror 6, and a fourth lens group 7. The first image collector 8, the first motor (not shown in the figure), the second light source 9, the diaphragm 10, the seventh lens group 11, the beam splitter 12, the fifth lens group 13, and the sixth lens group 14. The second image collector 5 and the second motor (not shown in the figure).

[0037] The first lens group 1 and the second lens group 2 form a fixation module f...

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Abstract

The invention provides a handheld independent vision measurement device and method. The handheld independent vision measurement device comprises a corneal curvature measurement module which comprises a first light source, a first image collector and a motor; first light beams are emitted from the first light source; the first image collector is used for collecting images formed by the first light beams after reflection through a cornea; the motor is used for driving the first image collector; the first image collector is driven by the motor to move along a corneal curvature measurement light path. The first image collector is driven by the motor to automatically focus and accordingly the focusing is achieved without the help of a second person and an examinee can achieve the version measurement independently. According to the handheld independent vision measurement device and method, the single-person operation of the examinee is implemented, the vision measurement is convenient, and the miniaturization and the portability of an optometry system can be effectively implemented.

Description

technical field [0001] The invention relates to a hand-held autonomous visual acuity measuring device and a visual acuity measuring method. Background technique [0002] At present, traditional optometry instruments are bulky and inconvenient to carry. Moreover, there are certain requirements for the user's professional knowledge, and professional optometrists are needed to measure the visual acuity of the measured person, and the measured person cannot complete the visual acuity measurement independently. The working principle of the traditional optometry instrument is: the person to be measured looks at the fixed visual mark inside (or outside) the instrument, and the measurer operates the three-dimensional joystick of the optometry instrument to adjust the three-dimensional distance between the optometry instrument and the human eye so that the human eye is in the center of the optometry system. Work position, and then perform visual acuity measurement. During the operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/107A61B3/103A61B3/14
CPCA61B3/028A61B3/107A61B3/14A61B3/0091A61B3/103
Inventor 谢佩蒋沁褚仁远周行涛王勤美曾骏文魏瑞华沈激
Owner SUZHOU SIHAITONG INSTR
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