Imaging Approaches for Contact Lens Deposition.

Area of Science:

• Ophthalmology
• Biomaterials Science
• Surface Chemistry

Background:

• Contact lens (CL) wear is associated with ocular surface issues, often linked to deposit formation.
• Deposits on CLs, comprising tear film components and external substances, can reduce lens-ocular surface biocompatibility.
• Understanding deposit characteristics is vital for developing strategies to enhance CL performance and patient comfort.

Purpose of the Study:

• To review and analyze the literature on imaging methods for studying deposits on contact lenses.
• To evaluate the effectiveness of various imaging techniques in characterizing CL deposits.
• To identify preferred imaging modalities for deposit analysis and their contribution to understanding adverse CL-related conditions.

Main Methods:

• A comprehensive literature search focused on imaging techniques for analyzing CL deposits.
• Inclusion of studies describing in-vitro, in-vivo, and ex-vivo imaging methods.
• Focus on methods providing both qualitative (morphological) and quantitative data.

Main Results:

• Fluorescence-based techniques and scanning electron microscopy (SEM) are frequently employed for CL deposit imaging.
• Imaging methods successfully revealed deposit morphologies and identified deposit types on various CL materials.
• Different CL materials exhibit distinct deposition patterns and quantities.

Conclusions:

• Imaging methods are superior to traditional assays for comprehensive CL deposit analysis, offering morphological and compositional insights.
• Advanced imaging techniques are essential for elucidating the relationship between CL deposits and adverse ocular conditions.
• Future research should integrate imaging with molecular-level analysis techniques for a complete understanding of CL deposits.