Refractometer capable of measuring accommodation power of lens

A technology of refractometer and lens, which is applied in the field of refractometer, can solve problems such as complex measurement algorithms, and achieve the effect of convenient measurement operation and simple structure

Pending Publication Date: 2018-07-20
苏州兆乘四海通科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, it is only for the measurement of accommodation power of hyperopic glasses and the measurement algorithm is complex

Method used

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  • Refractometer capable of measuring accommodation power of lens
  • Refractometer capable of measuring accommodation power of lens
  • Refractometer capable of measuring accommodation power of lens

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Embodiment Construction

[0031] 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. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0032] This embodiment provides a refractometer capable of measuring the accommodation power of the lens, and the refractor also has the functions of measuring diopter and corneal curvature that traditional computerized refractors have. In the following, the description will be focused on the measurement function of the lens accommodation force of th...

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Abstract

The invention discloses a refractometer capable of measuring the accommodation power of a lens. The refractometer is simple in structure and convenient to measure. The refractometer comprises a casing, a diopter measuring module and a fixation module, the fixation module forms a fixation optical path for human eyes to stare at, the fixation module comprises an arranged visual target plate and a fixation lens group, the visual target plate is provided with a visual target for observation of the human eyes, and the visual target plate is movably disposed on the casing along an optical axis of the fixation optical path; the casing is provided with a window right against the fixation optical path for the human eyes to stare at; the refractometer has a first measurement state and a second measurement state, and in the first measurement state, the visual target is located in the fixation optical path and has a first distance from the window to acquire a first image of the hyperopia diopter of the corresponding lens; in the second measurement state, the visual target on the visual target plate is located in the fixation optical path and has a second distance from the window to acquire a clear second image of the myopic diopter of the corresponding lens; the first distance is greater than the second distance.

Description

technical field [0001] The invention belongs to the field of optometry instruments, in particular to an optometry instrument capable of measuring the accommodation force of a lens. Background technique [0002] The lens is located in front of the vitreous body of the eye, and is connected to the ciliary body by the suspensory ligament of the lens. It is biconvex lens-shaped and elastic. The lens is a biconvex transparent tissue suspended behind the iris and in front of the vitreous by the zonules. In the lens, farsightedness and nearsightedness due to its own adjustment mechanism. The adjustment power of the lens is mainly reflected in its ciliary muscle. When the ciliary muscle is relaxed, the lens tends to be flat; when the ciliary muscle is tensed, the lens tends to be round. In this way, the lens can selectively focus on near and far objects, thereby providing near and distance vision respectively. The lens is an important part of the refractive system of the eyeball,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/103A61B3/107
CPCA61B3/103A61B3/0016A61B3/107
Inventor 沈兆乘
Owner 苏州兆乘四海通科技有限公司
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