CN-224206813-U - Visual acuity chart

Abstract

The utility model discloses an eye chart, which is technically characterized by comprising a chart body substrate and an eye testing pattern arranged on the chart body substrate, wherein a detection pattern area corresponding to the eye testing pattern and a blank pattern area positioned at the periphery of the eye testing pattern are arranged on the chart body substrate, a reflective coating is arranged on the detection pattern area and/or the blank pattern area, a non-reflective color filling layer is arranged on the blank pattern area when the reflective coating is arranged on the detection pattern area, a non-reflective color filling layer is arranged on the detection pattern area when the reflective coating is arranged on the blank pattern area, and a non-reflective color filling layer is arranged on the detection pattern area when the reflective coating is arranged on both the detection pattern area and the blank pattern area. Therefore, when the visual testing machine is used in a darker environment, a user can conveniently test the vision by using the visual testing machine through the reflecting effect of the reflecting coating only by holding the light source by the user, the use scene is not limited by a power supply, and the use flexibility and the application range of the visual testing machine are greatly improved.

Inventors

• WANG YUNLONG

Assignees

• 温州一度智光科技有限公司

Dates

Publication Date

20260508

Application Date

20250118

Claims (2)

1. 1. An eye chart comprises a chart body substrate and an eye testing pattern arranged on the chart body substrate, wherein the chart body substrate is provided with a testing pattern area corresponding to the eye testing pattern and a blank pattern area positioned at the periphery of the eye testing pattern, the eye chart is characterized in that the testing pattern area and/or the blank pattern area are provided with a reflective coating, When the detection region is provided with a reflective coating, the blank region is provided with a non-reflective color filling layer; when the blank region is provided with a reflective coating, the detection region is provided with a non-reflective color filling layer; when the detection region and the blank region are both provided with the reflective coating, the detection region is provided with the non-reflective color filling layer.
2. 2. The visual acuity chart according to claim 1, wherein the chart base material is made of soft paper or cloth or film.

Description

Visual acuity chart Technical Field The utility model relates to the technical field of vision testing tools, in particular to an eye chart. Background The visual acuity chart is a chart for measuring eyesight, and a visual acuity test pattern for measuring eyesight is arranged on the chart body. At present, china patent with the application number 201220318612.1 discloses an eye chart, which comprises a cuboid-shaped eye chart case, wherein the front surface of the case shell of the cuboid-shaped eye chart case is transparent glass, rotating rollers with handles are respectively arranged at the upper end and the lower end in the case body, at least two groups of strip-shaped eye charts with complete sets of eye marks printed on the surfaces are wound on the rotating rollers, the paper surface printed with the eye marks is positioned at the back of the transparent glass, and a plate-shaped LED luminous screen is arranged at the back of the strip-shaped eye chart. The visual chart is characterized in that the light source is improved into a plate-shaped LED luminous screen from a common fluorescent tube, so that the brightness of the whole visual chart is uniform and soft, and the visual chart is favorable for a person to be inspected to identify visual symbols, but the existing visual chart combined with the lamp box is too large in size and inconvenient to carry, and can only be used in an environment with a power supply, and the applicable scene is limited. Disclosure of utility model Aiming at the defects in the prior art, the utility model aims to provide an eye chart so as to solve the problems in the background art. In order to achieve the purpose, the utility model provides the technical scheme that the visual acuity chart comprises a chart body substrate and a visual acuity test pattern arranged on the chart body substrate, wherein the chart body substrate is provided with a test pattern area corresponding to the visual acuity test pattern and a blank pattern area positioned at the periphery of the visual acuity test pattern, the test pattern area and/or the blank pattern area are provided with reflective coatings, When the detection region is provided with a reflective coating, the blank region is provided with a non-reflective color filling layer; when the blank region is provided with a reflective coating, the detection region is provided with a non-reflective color filling layer; when the detection region and the blank region are both provided with the reflective coating, the detection region is provided with the non-reflective color filling layer. The utility model further provides that the surface substrate is made of soft paper or cloth or film. In summary, the visual testing device has the advantages that when the visual testing device is used in a darker environment, a user can conveniently test the vision by using the reflective effect of the reflective coating only by holding the light source to illuminate the visual testing chart, the use scene is not limited by the power supply, and the use flexibility and the application range of the visual testing chart are greatly improved. Drawings FIG. 1 is a schematic view of an eye chart; fig. 2 is a schematic technical diagram of a reflective coating. The reference sign is 1, the surface body base material, 11, the detection region, 12, the blank region, 2, the vision detection pattern, 3, the reflective coating, 31, the glass microsphere, 32, the adhesive layer, 33 and the reflective layer. Detailed Description The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, in which like parts are denoted by like reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component. Referring to fig. 1-2, an eye chart comprises a chart body substrate and an eye test pattern arranged on the chart body substrate, wherein a detection pattern area corresponding to the eye test pattern and a blank pattern area positioned at the periphery of the eye test pattern are arranged on the chart body substrate, the detection pattern area is overlapped with the eye test pattern, and a reflective coating is arranged on the detection pattern area and/or the blank pattern area, wherein the reflective coating is a known technology and can be made by adopting the prior reflective coating, and when light irradiates the reflective coating, most of the light can be concentrated in a very small angle range and reflected back to a light source to form a retro-reflection (also called as 'retro-reflection') phenomenon, so that an excellent reflective effect is generated. The tec