Objective:
To explore the evolution of biocompatibility in contact lens materials and their impact on long-term wear success, emphasizing the relationship between material properties and user experience.
Key Findings:
- Contact lenses have over 140 million wearers globally, indicating their effectiveness in addressing vision correction needs.
- PMMA lenses improved wearability but revealed significant biocompatibility issues, particularly regarding oxygen transmission during long-term use.
- Silicone hydrogels significantly reduce hypoxia-related complications but do not eliminate all issues associated with overnight wear, leading to ongoing discomfort for some users.
Interpretation:
The evolution of contact lens materials reflects ongoing efforts to enhance biocompatibility and user comfort, yet challenges remain, particularly dropout rates due to discomfort linked to material properties.
Limitations:
- Mixed evidence in literature regarding contact lens dropout complicates understanding and addressing the issue, with varying reports on user experiences.
- Some complications persist despite advancements in material technology, particularly in relation to long-term wear and user comfort.
Conclusion:
While significant progress has been made in contact lens technology to improve biocompatibility and comfort, dropout rates due to ocular discomfort remain a challenge, necessitating further research and innovation.
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