Contact lens deposits (Proteins, lipids, and polysaccharides)

Deposited polysaccharides and other biomolecular film components on contact lens surfaces represent a heterogeneous accumulation of host-derived substances from the tear film. This film primarily consists of proteins such as lysozyme, lactoferrin, and albumin, alongside various lipids like cholesterol and wax esters, and polysaccharides including mucins (Luensmann & Jones, 2012). While some components like lysozyme maintain antimicrobial activity when in their native state, the denaturation of these proteins over time can trigger inflammatory responses (Omali et al., 2015). These deposits also serve as a scaffold for bacterial attachment and biofilm formation, significantly increasing the risk of microbial keratitis and giant papillary conjunctivitis (Willcox, 2013). In the context of ophthalmic care, these biomolecules are the primary targets for removal by contact lens solutions. Cleaning agents such as surfactants, proteolytic enzymes, and oxidative systems are designed to emulsify lipids, break down protein aggregates, and disinfect the lens surface to restore biocompatibility and maintain ocular health (Lorentz & Jones, 2007).

Other names

Lens spoilageContact lens biofilmTear film depositsProteinaceous depositsLipid depositsBiomolecular film

Removal via surfactant-mediated emulsification of lipids, enzymatic proteolysis of denatured protein aggregates, oxidative degradation of organic matter, and chelation of stabilizing metal ions to disrupt the film matrix.