Gaussian Laser Beam Profile for Iris Treatment Fundus Protection
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Solution Overview
Problem
Existing methods for applying electromagnetic radiation to the human iris for ophthalmic procedures cannot guarantee 100% protection against accidental exposure to the fundus, as contact lenses can move and eye tracking systems are susceptible to errors and slow response times.
Innovation Solution
A device with a Gaussian laser beam profile that converges and diverges at specific angles to ensure higher energy density at the anterior iris, combined with computerized scanning systems and eye movement tracking, to prevent fundus exposure. Additionally, head and eye fixation techniques are used to restrict movement during procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If contact lens occlusion is used to block electromagnetic radiation pathway, then fundus protection is improved, but reliability deteriorates because contact lenses can move during surgery leaving the pupil unprotected
Solution Approach 1:
The patent introduces an intermediary protective element - a physical barrier or occluding device positioned between the electromagnetic radiation source and the fundus. This intermediary structure actively blocks the radiation pathway while allowing the treatment to proceed, solving the reliability issue by providing a stable, non-moving protection mechanism rather than relying on contact lens occlusion that can shift during surgery.
Solution Approach 2:
The patent implements preliminary protective measures by pre-positioning occluding structures or safety barriers before the electromagnetic radiation treatment begins. These pre-established protective elements ensure that the fundus is already protected when the radiation is applied, eliminating the need for real-time adjustments and ensuring continuous protection throughout the procedure.
2Object-affected harmful factors
If eye tracking systems are used to shift treatment pattern, then fundus protection is improved, but reliability deteriorates due to mechanical and calculation errors and slow response time
Solution Approach 1:
The patent introduces an intermediary safety mechanism - a physical or optical barrier that stands between the treatment system and the fundus. This intermediary provides passive, fail-safe protection that does not depend on the complexity or speed of eye tracking algorithms, thereby improving reliability by eliminating dependence on computational processes that can introduce errors.
Solution Approach 2:
The patent implements beforehand cushioning by establishing pre-programmed safety zones, protective barriers, or occluding structures that are positioned in advance to prevent radiation from reaching the fundus. These pre-established protective measures act as a safety buffer that compensates for potential tracking errors or delays, ensuring the fundus remains protected even when eye movement detection fails.
3Productivity
If electromagnetic radiation is applied to large portion of iris, then treatment efficacy is improved, but harmful factors worsen due to risk of accidental exposure to fundus
Solution Approach 1:
The patent segments the iris treatment area from the fundus by using anatomical landmarks, optical barriers, or spatial delimitation techniques to define clear boundaries. This segmentation allows the electromagnetic radiation to be applied effectively to the anterior iris while physically or optically separating the treatment zone from the fundus, thereby maintaining treatment efficacy while preventing harmful exposure to the posterior eye structures.
Solution Approach 2:
The patent applies local quality by concentrating the electromagnetic radiation energy density specifically at the anterior iris treatment site while reducing or eliminating energy delivery to the fundus region. This localized energy distribution achieves effective treatment of the target area (anterior iris) while minimizing or preventing harmful effects on adjacent or posterior structures (fundus), thereby improving the risk-benefit ratio.
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 ensures uniform application of electromagnetic radiation to the anterior iris while minimizing risk to the fundus, providing effective protection against accidental exposure through controlled beam divergence and movement restriction.
Implementation Method 1
The profile of the laser beam may be Gaussian, such that the beam profile converges to a focal point and then diverges from that focal point. Due to the profile of the laser beam, the energy density at the anterior iris is greater than the energy density at the fundus.
Data Source
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AI summary
Rather than rely solely upon restriction of eye movement or tracking of eye movement to protect the funds from accidental exposure to electromagnetic radiation, the present invention also utilizes an electromagnetic radiation pathway with a profile such that the energy density at the iris is greater than the energy density at the posterior portion of the eye. This disparity in energy density allows for efficacy at the anterior iris treatment site, without injury to the fundus.