Head-Mounted Vision Tester Switching Display Images to Reduce Stress
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Solution Overview
Problem
Vision testing devices that require testees to wear a head-mounted device often cause psychological uneasiness and stress due to the dark environment, making them unaware of their surroundings.
Innovation Solution
A vision testing device equipped with a camera to capture external images and a display control unit that switches between test images and external images, allowing the testee to optically confirm their surroundings during the test using an operation device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a head-mount type vision testing device is used to perform a vision test in a dark environment, then the test precision is improved, but the testee experiences psychological uneasiness and stress
Solution Approach 1:
The display device dynamically switches between displaying test images and external images captured by the camera. The display control unit receives switching instructions and alternates the display content based on test requirements and testee comfort needs, allowing the system to adapt between precision testing mode and comfort maintenance mode
Solution Approach 2:
The camera and display device act as intermediaries between the testee and the external environment. The camera captures external images that can be displayed to the testee, serving as a mediator that provides visual connection to surroundings while maintaining the head-mount testing configuration
2Reliability
If the display device shows only test images in a dark environment, then the test conditions are maintained, but the testee becomes unaware of surrounding circumstances
Solution Approach 1:
The display device periodically switches between test images and external images based on switching instructions. This periodic alternation allows the testee to occasionally perceive external environment information while maintaining test condition stability during the majority of testing time
Solution Approach 2:
The camera continuously captures external images in advance, and the display control unit is prepared to switch to external images when needed. This preliminary preparation ensures that environmental information can be provided immediately when the testee needs reassurance or awareness of surroundings
3Measurement precision
If the device maintains a completely dark environment, then the vision test accuracy is improved, but the testee cannot confirm their safety and surroundings
Solution Approach 1:
The lighting environment dynamically transitions between dark (for accurate vision testing) and illuminated (for safety confirmation). The display control unit switches between test images and external images based on real-time needs, allowing the testee to confirm safety while maintaining test accuracy when required
Data Source
AI summary
A vision testing device capable of reducing a psychological sense of uneasiness, stress and the like given to a testee when a vision test is performed with a main body of the vision testing device mounted on a head portion of the testee, including: a device main body mounted on a head portion of a testee who undergoes a vision test, and having display devices for displaying a test image for the testee and a camera for photographing an external image; a switch operated by the testee; and a display control unit which performs switching of display images to be displayed on display devices between a test image and the external image photographed by the camera when the switch is operated under a predetermined operation condition in a state that the test image is displayed on the display devices.