Ophthalmic Laser Treatment Guide Display for Multi-Spot Alignment
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Solution Overview
Problem
Existing ophthalmic laser treatment devices require skilled operators to adjust the aiming point of treatment laser light using a contact lens with a reflective surface, which is challenging due to the need for precise alignment and rotation of the lens, especially when multiple tissue areas are treated.
Innovation Solution
An ophthalmic laser treatment device with a treatment laser light source, aiming light source, irradiation position moving unit, observation optical system, display unit, and control unit that supports accurate and efficient treatment by providing a guide for aligning irradiation spots and adjusting the aiming point using a contact lens with a reflective surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a contact lens with a reflective surface is used to treat multiple tissue areas, then the treatment coverage is improved, but the operator's skill requirement and alignment difficulty increase
Solution Approach 1:
The patent introduces a guide light as an intermediary element that projects onto the reflective surface of the contact lens to indicate the next irradiation position. This guide light serves as a mediator between the treatment plan and the operator's aiming action, eliminating the need for the operator to mentally calculate or manually adjust the aiming point when rotating the contact lens to treat multiple areas.
2Measurement precision
If the operator manually adjusts the aiming point for each irradiation spot, then the treatment precision can be maintained, but the treatment time increases
Solution Approach 1:
The system performs preliminary calculation of all irradiation positions and sequences before treatment begins. The guide light pre-indicates the next target position on the contact lens reflective surface, so when the operator completes one irradiation and rotates the lens, the next aiming point is already visually indicated, eliminating the need for time-consuming manual adjustment and maintaining both precision and efficiency.
3Adaptability or versatility
If the irradiation position is moved frequently to treat multiple spots, then the treatment completeness is improved, but the observation image stability deteriorates
Solution Approach 1:
The guide light projects onto the contact lens reflective surface as an intermediary reference that remains stable relative to the lens rotation. This allows the observation image of the tissue to remain stable while the guide indicator shows the next target position, decoupling the stability requirement from the position-changing requirement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device enhances the accuracy and efficiency of laser treatment by reducing the operator's workload and maintaining a stable observation image, allowing for precise alignment of multiple irradiation spots even when the contact lens is rotated or the device position changes.
Implementation Method 1
using a contact lens having a reflective surface that reflects the treatment laser light and the aiming light in a direction intersecting an optical axis
Data Source
AI summary
An ophthalmic laser treatment device includes a control unit that executes a guide display step of controlling a display unit to display a guide in accordance with a progress of an irradiation plan. The guide is used to align a target position on a tissue of a patient's eye with a next irradiation spot of a plurality of irradiation spots at which treatment laser light is scheduled to be emitted next time. The control unit further executes an irradiation position movement step of moving an irradiation position of the treatment laser light and an aiming light by controlling an irradiation position moving unit.