Ophthalmologic Laser Apparatus Iris Obstruction Handling
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Solution Overview
Problem
Laser treatment in ophthalmology faces challenges such as misalignment of treatment laser light due to eye conditions, iris obstruction, and optical aberrations, leading to reduced therapeutic effects and safety concerns.
Innovation Solution
A laser treatment apparatus with a photographing system, irradiation system, and controller that determines the irradiation pattern of treatment laser light based on a photograph of the eye and a preset aiming pattern, adjusting to ensure accurate and safe delivery of laser energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If laser treatment is performed to peripheral site of fundus or when size of aiming pattern is large, then treatment coverage is improved, but treatment laser light is blocked by iris causing safety issues
Solution Approach 1:
The system performs preliminary photography of the eye to capture the actual irradiation pattern before treatment. Based on this captured pattern, the irradiation-pattern determining part pre-determines which positions should be excluded from treatment, preventing iris obstruction issues before they occur.
Solution Approach 2:
The system uses feedback from the photographing system that captures the actual irradiation pattern on the eye. This feedback information is used by the irradiation-pattern determining part to adjust and determine the final irradiation pattern, ensuring that blocked positions are excluded from treatment.
2Area of stationary object
If laser treatment is performed to peripheral site of fundus, then treatment coverage is improved, but optical aberration blurs treatment laser light reducing therapeutic effects
Solution Approach 1:
The system performs preliminary photography to capture the actual irradiation pattern including any blur or aberration effects before treatment. The irradiation-pattern determining part uses this information to pre-determine excluded positions where precision is compromised.
Solution Approach 2:
The photographing system provides feedback on the actual irradiation pattern quality. The irradiation-pattern determining part uses this feedback to identify and exclude positions where optical aberration has degraded the laser spot precision, ensuring only high-quality treatment positions are treated.
3Reliability
If adjustments of treatment positions and aiming pattern are performed on each occasion to avoid iris obstruction and optical aberration, then treatment safety and precision are improved, but operative duration and labor increase
Solution Approach 1:
The system performs self-diagnosis by automatically photographing the eye and capturing the actual irradiation pattern. The irradiation-pattern determining part automatically determines which positions to exclude based on this self-captured information, eliminating the need for manual adjustments by the operator.
Solution Approach 2:
The system accelerates the diagnostic process by using automated photography and image processing to rapidly identify excluded positions, replacing time-consuming manual assessment and adjustment procedures.
Data Source
AI summary
Safety of ophthalmologic laser treatment is improved. A laser treatment apparatus of an embodiment includes: a photographing system that photographs an eye; an irradiation system that irradiates aiming light of a preset pattern and treatment laser light onto a fundus of the eye; an irradiation-pattern determining part that determines an irradiation pattern of the treatment laser light based on a photograph image of the eye acquired by the photographing system and the preset pattern; and a controller that controls the irradiation system so as to irradiate the treatment laser light of the determined irradiation pattern.