Preferred Retinal Locus Training Using Head-Motion Analysis
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Solution Overview
Problem
Patients with visual field damage cannot accurately identify their preferred retinal locus, leading to inefficient peripheral vision reinforcement, as conventional methods rely on professional diagnosis and may not align with the patient's actual preferred retinal area, thereby reducing treatment efficacy.
Innovation Solution
An apparatus and method that uses a stimulus providing device to provide first and second stimuli, analyze head motion in two-dimensional coordinates, classify responses, and specify the preferred retinal locus through principal component analysis, enabling targeted training for central fixation and reinforcement of the preferred retinal locus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional professional measurement methods (microperimetry) are used to identify preferred retinal locus, then measurement precision is improved, but device complexity and loss of information increase because professional medical staff intervention is required and patient's own perception is not directly captured
Solution Approach 1:
The system enables patients to self-identify their preferred retinal locus through direct interaction with the display device. Patients indicate their preferred viewing location by responding to stimuli and controlling cursor movement, eliminating the need for professional medical staff to perform the measurement. This self-service approach reduces device complexity while maintaining measurement precision.
Solution Approach 2:
The system introduces an intermediary interface between the patient and the measurement process. A cursor control mechanism serves as a mediator, allowing patients to indirectly indicate their preferred retinal locus through natural eye movement and response patterns, thereby simplifying the system while capturing accurate patient-specific data.
2Ease of operation
If eccentric viewing training is performed without accurate PRL identification, then ease of operation is improved, but treatment efficacy deteriorates because the reinforced peripheral vision does not align with the patient's actual preferred retinal area
Solution Approach 1:
The system performs preliminary identification of the patient's preferred retinal locus before initiating the eccentric viewing training. By first accurately determining where the patient naturally focuses their vision, the system can then configure the training stimuli to target the correct peripheral area, ensuring that the training reinforces the patient's actual functional vision rather than arbitrary locations.
Solution Approach 2:
The system incorporates feedback mechanisms that continuously monitor patient responses and adjust training parameters accordingly. By observing how patients respond to stimuli and move their eyes, the system refines its understanding of the preferred retinal locus and adapts the training to align with the patient's actual visual preferences, thereby maintaining high treatment efficacy.
3Measurement precision
If professional diagnosis is required for PRL identification, then measurement precision is improved, but loss of information increases because patient's own visual perception and preference data are not directly captured
Solution Approach 1:
The system directly captures patient perception data by enabling patients to interact with the display and indicate their preferred viewing locations through their own responses and eye movements. This eliminates the information loss that occurs when professionals interpret indirect measurement data, as the system records the patient's actual visual behavior and preferences first-hand.
Solution Approach 2:
The system replaces the mechanical/professional diagnosis process with a digital interaction system. Instead of relying on professionals to interpret visual field data, the system uses electronic sensors and software to directly capture and record patient responses, eye movements, and preference indications, thereby preserving complete patient-specific information without loss.
Data Source
AI summary
Provided are a device, method and program for searching and training a preferred retinal locus of a patient with visual field damage. The method comprises the steps of: providing first stimulation to a patient by means of a stimulation providing device linked to the device; receiving, from the patient, a response with respect to the first stimulation by means of the stimulation providing device; if the response is correct, analyzing the movement of the patient's head corresponding to the first stimulation; specifying a preferred retinal locus on the basis of the analysis result; performing training associated with the patient's central fixation; and performing training associated with reinforcement of the patient's preferred retinal locus.