Priority gaze visual acuity test chamber

Abstract

A cabin (10) developed for outpatient clinics and clinics for quantifying visual acuity using Teller technology, regardless of verbal information provided by the subject (pc), and to be used by professionals; the cabin (10) has a modular structure (20), thereby providing an isolated environment (AS) for the subject (pc) to perform a priority gaze visual acuity test by reading a Teller visual acuity card (CT), the Teller visual acuity card being placed in a visible area (21a) in the center of a movable bulkhead (21), which can be moved by pulleys (rd) along a wall mounted on the cabin floor (22) and The track (30 and 31) on the ceiling (25) supported by the frame (25a) moves; the entire modular structure (20) has a white and matte tone and is equipped with a cabin lighting device (IL) that can be adjusted and controlled according to the test needs; in front of the movable bulkhead (21), close to the rear wall (24) in the cabin (10), a seat (28) for the person being tested (pc) and his companion is installed; the distance (d1) between the person being tested (pc) and the visible area (21a) of the card (CT) is adjusted by sliding the movable bulkhead (21), wherein the minimum distance is 38 cm and the maximum distance is 84,55 cm, and the distance should be adjusted according to the characteristics of the person being tested (pc) to ensure the effectiveness of the test.

Description

Technical Field

[0001] The present invention relates to a preferential gaze visual acuity test chamber for quantifying visual acuity regardless of the verbal information provided by the subject, more precisely, a chamber using the "Teller" technique; the visual acuity test chamber is developed for environments such as outpatient clinics and clinics and must be used by professionals; it should be noted that the structure of the chamber is conducive to improving the accuracy of diagnosis because it has a movable wall that can slide, through which the relative distance between the "Teller" visual acuity card and the subject in the chamber can be adjusted according to the characteristics and test specifications of each subject. The internal environment of the chamber does not have any visual influencing factors that can distract the subject's attention, thereby greatly improving the accuracy, reliability and repeatability of the preferential gaze visual acuity test. Background Art

[0002] As we all know, visual acuity basically refers to the ability of the eyes to distinguish spatial details, that is, the ability to recognize the outline and shape of objects. If the person being tested is an infant who has not yet learned to speak, an illiterate child, a person with psychomotor retardation, a person with cognitive dysfunction, a brain-damaged person with quadriplegia and inability to speak, etc., it is necessary to adopt the preferential gaze visual acuity test method, which is suitable for all persons being tested.

[0003] The principle of visual acuity is that humans naturally prefer to look at things that show details rather than areas without details, so when faced with a whiteboard, people will focus on any specific part of the whiteboard, no matter how small it appears.

[0004] The Teller test is one of the most commonly used visual acuity test methods. This method requires the use of Teller visual acuity cards. Each card includes a neutral rectangular area with another contrasting stripe area on one side of the rectangular area that is significantly different in color from the rectangular area. The stripes in this area are arranged according to the mathematical calculation of "centimeter cycles". There is also a peephole in the center of the visual acuity card, through which the tester can observe the reaction of the person being tested.

[0005] During the Teller test, the tester positions himself at a distance of 84, 55 or 38 cm from the eyes of the person being tested, depending on the test specifications, and faces the side of the card with the contrasting stripes towards the person being tested.

[0006] Since the detail area only occupies half of the card surface facing the subject, when the subject realizes the existence of the detail, the tester can observe his action through the peephole on the card (observe whether the subject sees the detail). After confirming that the subject has seen the details of the first card, the second card is changed and the subject is asked to look at the detail area of ​​the card, and so on. When the subject no longer looks at the detail area, it can be considered that the previous card corresponds to the visual acuity of the subject.

[0007] It turns out that in order to conduct the test smoothly, the tester must hold the card in front of him / her with both hands until it is level with the person being tested's eyes, and align his / her eyes with the peephole on the card, but doing so will cause the card to be unstable.

[0008] Another disadvantage of the current use of "Teller" acuity cards to test visual acuity is external interference. For example, the tester's hand holding the card may cause the person being tested to stare at the tester's hand instead of the contrast stripes, making it difficult for the tester to make an accurate diagnosis in the preferential gaze acuity test.

[0009] In a study of a special database, a document numbered CN205378090 on the priority gaze visual acuity test was found. The document discloses a visual acuity card inspection synchronous video system, which is placed in front of the position of the person being tested, and a front video camera is arranged on the visual acuity board at the same level as the position of the person being tested, and a visual acuity card placement position is arranged at the position of the person being tested, and a video recording client is arranged below the visual acuity board facing away from the position of the person being tested, and a synchronous video player is arranged above, and the video recording client and the synchronous video player are connected through an image transmission line, and a connecting rod is arranged horizontally above the position of the visual acuity board facing the position of the person being tested, and a rear video camera is arranged at the end of the connecting rod downwardly facing the position of the person being tested, and the rear video camera is connected to the synchronous video player through a connecting line; the interface between the image transmission line and the synchronous video player host has a USB interface. When operating, you only need to turn on the video recording client and instruct the child being tested to sit in the designated position. After turning on, this tool can observe and record all the movements of the child being tested in real time according to the needs of the examining physician, without the assistance of other special equipment, which is fast, convenient, objective and accurate.

[0010] Although the documents cited in the above paragraphs belong to the same application field, they do not have any features of the present improved invention content, so the present invention content is guaranteed to meet the legal requirements for patent applications. Summary of the invention

[0011] The purpose of the present invention is to provide a preferential gaze visual acuity test cabin based on a "Teller" visual acuity card, wherein the test cabin provides an environment for a subject to perform a preferential gaze visual acuity test by reading a "Teller" visual acuity card, wherein the "Teller" visual acuity card is placed in a visible area at the center of a movable cabin wall, and the cabin wall can be moved along tracks installed on the floor and ceiling of the cabin, thereby adjusting the relative distance between the card and the subject's eyes under relevant restrictions.

[0012] Another object of the present invention is to provide a neutral and isolated cabin environment for the subject to undergo visual acuity testing to avoid potential external interference when viewing the Teller card, thereby ensuring an accurate diagnosis based on the subject's response.

[0013] Another object of the present invention is to provide a viewing area on the movable wall within the cabin that can stably support the card.

[0014] Another object of the present invention is to provide a chamber with fixed and controlled lighting so that the cards can be more easily viewed during testing.

[0015] In short, the accuracy, reliability, and repeatability of the preferential fixation visual acuity test chamber will be greatly improved with the use of the chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to supplement this description and make the features and advantages of the present invention more easily understood, the attached description includes a set of drawings, which describe the embodiments of the present invention in an exemplary and non-limiting manner:

[0017] Figure 1 is an exploded perspective view of the cabin structure;

[0018] Figure 2 A three-dimensional diagram of the installation of the cabin;

[0019] Figure 3 It is the AA longitudinal section of the previous figure and the corresponding enlarged details;

[0020] Figure 4 It is a longitudinal section view of AA, and shows how the test distance in the preferential gaze visual acuity test can be appropriately adjusted by sliding the movable bulkhead. DETAILED DESCRIPTION

[0021] As shown in the accompanying drawings, the patent of the present invention relates to a "preferential gaze visual acuity test cabin", more specifically, a cabin (10) developed for environments such as outpatient departments and clinics, using "Teller" technology to quantify visual acuity regardless of the verbal information provided by the person being tested (pc), and must be used by professionals.

[0022] According to the invention, the cabin (10) has a modular structure (20) made of wood, plasterboard walls, PVC or other materials, thereby providing an isolated environment (AS) for the test person (pc) to perform a preferential gaze acuity test by reading a "Teller" acuity card (CT) placed in a visual area (21a) in the center of a movable bulkhead (21) that can be moved by pulleys (rd) along rails (30 and 31) installed on the cabin floor (22) and on the ceiling (25) supported by a frame (25a). The entire modular structure (20) has a white and matte color tone and is equipped with an interior lighting device (IL) that can be adjusted and controlled according to the test needs.

[0023] In front of the movable bulkhead (21), a seat (28) for the person being tested (PC) and his companions is installed close to the rear wall (24) in the cabin (10).

[0024] The distance (d1) between the person being tested (pc) and the visible area (21a) of the card (CT) is adjusted by sliding the movable bulkhead (21), wherein the minimum distance is 38 cm and the maximum distance is 84.55 cm. The distance should be adjusted according to the characteristics of the person being tested (pc) to ensure the effectiveness of the test.

[0025] In a preferred construction form, the modular structure (20) has a height (t1), length (c1) and width (l1) that are perfectly matched to the interior of an outpatient department, clinic or similar institution, and is composed of a floor (22), side walls (23), a rear wall (24) and a ceiling (25), and an opening (VF) with a frame (26) is arranged on the front side for installing a movable bulkhead (21), the width (l2) and height (t2) of which are slightly smaller than the width (l2') and height (t2') of the opening (VF). One of the side walls (23) is provided with a door opening (23a) for installing a hinged door (27), which is fixed by hinges (db) and equipped with a handle (Px).

[0026] The card (CT) viewing area (21a) on the movable bulkhead (21) is a central rectangular cutout (21b), and an L-shaped support (21c) is arranged on its outer surface to cover the cutout (21b), thereby forming a space (IT) for placing the card (CT). The support (21c) has a central hole (21d), which is aligned with the card peephole (o1) when the card (CT) is placed, so that the tester can observe the reaction of the person being tested (pc) in the cabin (10).

[0027] It should be understood that the present invention is not limited to the specific embodiments described above, and various changes may be made thereto in form and structure without departing from the basic principles clearly stated in the claims of the present invention, and therefore the terms used in the document are not intended to be limiting.

Claims

1. A "Preferential Gaze Visual Acuity Test Chamber" is a chamber (10) developed for outpatient and clinic environments using "Thiele" technology, which is used to quantify visual acuity and must be used by professionals regardless of the verbal information provided by the person being tested (pc), characterized by: The cabin (10) has a modular structure (20), thereby providing an isolated environment (AS) for the test person (pc) to perform a priority gaze visual acuity test by reading a "Thiele" card (CT), which is placed in a visible area (21a) in the center of a movable bulkhead (21), which can be moved by using pulleys (rd) along rails (30 and 31) installed on the cabin floor (22) and on the ceiling (25) supported by a frame (25a); the entire modular structure (20) has a white and matte color tone and is equipped with a device that can be adjusted according to the test needs. and controlled cabin lighting device (IL); a seat (28) for the person being tested (pc) and his companion is installed in front of the movable bulkhead (21) and close to the rear wall (24) in the cabin (10); the adjustment of the distance (d1) between the visible area (21a) of the person being tested (pc) and the card (CT) is related to the sliding of the movable bulkhead (21) on the tracks (30 and 31); the test shows that the minimum distance is 38 cm, the maximum distance is 84 cm, and the accuracy of the intermediate distance is 55 cm. The distance should be adjusted according to the characteristics of the person being tested (pc) to ensure the effectiveness of the test.

2. The "preferential gaze visual acuity test chamber" as claimed in claim 1, characterized in that: There is a modular structure (20) made of wood, plasterboard walls, and PVC.

3. The "preferential gaze visual acuity test chamber" as claimed in claim 1, characterized in that: The modular structure (20) has a height (t1), a length (c1) and a width (l1) matching the interior of an outpatient department or clinic, and is composed of a floor (22), a side wall (23), a rear wall (24) and a ceiling (25). A front entrance (VF) with a frame (26) is arranged on the front side for installing a movable bulkhead (21), and the width (l2) and height (t2) of the bulkhead are slightly smaller than the width (l2') and height (t2') of the front entrance (VF); one side wall (23) is provided with a door opening (23a) for installing a hinged door (27), and the hinged door is connected by a hinge (d b) on a fixed side wall (23) and including a handle (Px); a card (CT) visible area (21a) on the movable cabin wall (21) includes a central rectangular cutout (21b), and an L-shaped support member (21c) is arranged on its outer surface for covering the cutout (21b), thereby forming a space (IT) for placing the card (CT); the support member (21c) has a central hole (21d), and when the card (CT) is placed, the central hole (21d) is aligned with the peephole (o1) of the card so that the tester can observe the reaction of the person being tested (pc) in the cabin (10).

Images