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Scleral Lens Fenestrations and Fluid Reservoir Debris
Damien Fisher1, Luisa Holguin Colorado1, David Alonso-Caneiro1,2
1Centre for Vision and Eye Research, Optometry and Vision Science, Queensland University of Technology, Brisbane, Queensland, Australia.
Summary
Fenestrated scleral lenses significantly reduce fluid reservoir debris compared to non-fenestrated designs. This finding suggests fenestrations may improve scleral lens wear by managing debris accumulation.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Contact Lens Technology
Background:
- Scleral lens wear can lead to debris accumulation in the fluid reservoir, potentially impairing vision and necessitating lens removal.
- Understanding factors influencing debris accumulation is crucial for optimizing scleral lens performance and patient comfort.
Purpose of the Study:
- To quantify the impact of limbal scleral lens fenestrations on the accumulation of debris within the fluid reservoir.
- To compare debris levels between fenestrated and non-fenestrated scleral lenses over a 3-hour wear period.
Main Methods:
- Twenty healthy adults wore both fenestrated and non-fenestrated scleral lenses for 3 hours on separate occasions.
- Customized MATLAB image analysis quantified central fluid reservoir debris from Scheimpflug images.
- Scleral lens parameters were standardized, with fenestrations being the primary variable.
Main Results:
- Fluid reservoir debris increased over time, with significantly greater accumulation in non-fenestrated lenses (p=0.03).
- After 3 hours, non-fenestrated lenses showed a 4.8-fold greater increase in total debris metric compared to fenestrated lenses.
- No significant difference in debris was observed for fenestrated lenses with or without an air bubble (p=0.80).
Conclusions:
- Fenestrated scleral lens designs demonstrate a potential benefit in managing fluid reservoir debris accumulation.
- Further long-term studies involving patients with ocular conditions are warranted to confirm these findings.
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