CN102485162A

CN102485162A - Fine-resolution eye chart

Info

Publication number: CN102485162A
Application number: CN2010105826857A
Authority: CN
Inventors: 郭毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-02
Filing date: 2010-12-02
Publication date: 2012-06-06

Abstract

The invention provides a fine-resolution eye chart. When the eyesight perception exceeds the applicable range of the Weber's law, the eyesight resolution is finely tested and remembered; a plurality rows of visual targets are inserted between every two adjacent visual target rows of a standard logarithmic eye chart with geometric series relationship so as to subdivide the geometric series increment between the two rows, wherein the plurality rows of visual targets have the arithmetic series relationship and other series relationships; and the reading and recording mode is to mark ':N' after the 5 grade (or decimal), wherein N is a natural number. A plurality of rows of visual targets with arithmetic series relationship are inserted into the adjacent visual target rows with arithmetic series relationship to subdivide the visual value increment between the two rows; and the reading and recording mode is to mark ':N:M' after the 5 grade (or decimal), wherein N and M are respectively a natural number.

Description

A kind of fine resolution visual acuity chart

Affiliated technical field

A kind of visual acuity chart relates in the visual acuity chart manufacturing process, on the Weber's law basis, formulates the sighting target mark and the note of standard logarithmic visual acuity chart and reads mode.

Background technology

At present, the making of known standard logarithmic visual acuity chart is that sighting target mark and the note of on the Weber's law basis, formulating standard logarithmic visual acuity chart read mode, adopts five fens or little number scale is read mode; But when visual discrimination power was in borderline condition, the vision law of perception had exceeded the Weber's law applicable scope, and in the ranks vision value difference value is big for sighting target on the present visual acuity chart, can not carry out meticulousr visual discrimination.

Summary of the invention

A kind of fine resolution visual acuity chart provides a kind of new method, and when the vision perception had exceeded the Weber's law applicable scope, the DCO detailed checkout note was watched the power resolving power attentively.

This fine resolution visual acuity chart solves the technical scheme that its technical problem adopted: at the standard logarithmic visual acuity chart sighting target capable adjacent two with geometrical progression ordered series of numbers relation in the ranks; List the multirow sighting target in to segment this two geometrical progression increment in the ranks, listed multirow sighting target has arithmetical series ordered series of numbers relation and has other ordered series of numbers relations; Read the note mode and be to indicate after (or decimal) note value at 5 minutes ": N ", N is a natural number.

The beneficial effect of this fine resolution visual acuity chart is: be in borderline condition in visual discrimination power, and when the vision perception has exceeded the Weber's law applicable scope, can DCO detailed checkout visual discrimination power, precisely mark and note is read sighting target.

Description of drawings

Below in conjunction with accompanying drawing and embodiment this fine resolution visual acuity chart is described further.

Fig. 1 is the partial view of an embodiment fine resolution visual acuity chart.

Fig. 2 is the partial schematic diagram of another embodiment fine resolution visual acuity chart.

1. standard logarithmic visual acuity charts, 5.0 (1.0) sighting targets are capable among the figure; 2. standard logarithmic visual acuity chart 5.1 (1.2) sighting targets are capable, and 3. the note value is that the sighting target of 5.0: 1 (1.0: 1) is capable, and 4. the note value is that the sighting target of 5.0: 2 (1.0: 2) is capable; 5. the note value is that the sighting target of 5.0: 9 (1.0: 9) is capable; 6. the note value is that the sighting target of 5.0: 1: 1 (1.0: 1: 1) is capable, and 7. the note value is that the sighting target of 5.0: 1: 2 (1.0: 1: 2) is capable, and 8. the note value is that the sighting target of 5.0: 1: 9 (1.0: 1: 9) is capable.

The specific embodiment

At an embodiment shown in Figure 1; This fine resolution visual acuity chart; At standard logarithmic visual acuity chart sighting target capable adjacent two in the ranks with geometrical progression ordered series of numbers relation; List the multirow sighting target in to segment this two geometrical progression increment in the ranks, listed multirow sighting target has arithmetical series ordered series of numbers relation and has other ordered series of numbers relations; Read the note mode and be to indicate after (or decimal) note value at 5 minutes ": N ", N is a natural number; Between (1) and (2), list (3), (4) to (5) totally 9 row sighting targets successively in, between its adjacent lines the tolerance of sighting target size be (1) with (2) in the ranks dimension difference 1/10.

In an embodiment shown in Figure 2, this fine resolution visual acuity chart has arithmetical series ordered series of numbers relation and has between the capable adjacent lines of the sighting target of other ordered series of numbers relations listed, lists the multirow sighting target again in to segment this two apparent value increment in the ranks; Read the note mode and be to indicate after (or decimal) note value at 5 minutes ": N: M ", N, M are natural number, between (3) and (4), list (6), (7) to (8) totally 9 row sighting targets successively in, between its adjacent lines the tolerance of sighting target size be (3) with (4) in the ranks dimension difference 1/10.

Claims

1. fine resolution visual acuity chart; It is characterized in that: in the ranks at standard logarithmic visual acuity chart sighting target capable adjacent two with geometrical progression ordered series of numbers relation; List the multirow sighting target in to segment this two geometrical progression increment in the ranks; Listed multirow sighting target has arithmetical series ordered series of numbers relation and has other ordered series of numbers relations, read the note mode and be to indicate after (or decimal) note value at 5 minutes ": N ", N is a natural number.

2. a kind of fine resolution visual acuity chart according to claim 1; It is characterized in that: between the adjacent two row sighting targets of standard logarithmic visual acuity chart, list the sighting target that multirow has arithmetical series ordered series of numbers relation in; The 9 row sighting targets of listing in; The tolerance of sighting target size between its adjacent lines, be standard logarithmic visual acuity chart adjacent two the row sighting targets between dimension difference 1/10.

3. a kind of fine resolution visual acuity chart according to claim 1; It is characterized in that: after adjacent two row of standard logarithmic visual acuity chart are listed the sighting target that multirow has arithmetical series ordered series of numbers relation between sighting targets in; Have between the capable adjacent lines of the sighting target of arithmetical series ordered series of numbers relation at these, list the sighting target that multirow has arithmetical series ordered series of numbers relation again in, to segment this two apparent value increment in the ranks; Read the note mode and be to indicate after (or decimal) note value at 5 minutes ": N: M "; N, M are natural number, the tolerance of sighting target size between 9 row sighting target its adjacent lines of listing in, be between separated adjacent two row sighting targets dimension difference 1/10.