Lens surface protein deposit

Lens surface protein deposits are accumulations of tear film components—primarily proteins like lysozyme, lipocalin, lactoferrin, albumin, and IgA—alongside mucins, lipids, calcium, and environmental contaminants on the anterior (and occasionally posterior) surfaces or within the matrix of contact lenses. These deposits form rapidly upon lens insertion and are encouraged by factors such as lens material, surface charge, and hydrophilicity. The deposits can denature, losing normal protein structure and function, leading to impaired lens clarity, reduced antimicrobial protection, ocular irritation, and inflammation. Clinical symptoms include discomfort, dryness, blurred vision, and a higher risk of ocular complications. Removal methods involve chemical cleaning solutions, enzymatic digestion, physical rubbing, and, most recently, electrophoresis. Unlike true molecular targets, lens surface protein deposits represent a pathology associated with medical devices rather than a specific molecular entity.

Other names

Lens debrisContact lens protein depositProtein filmJelly bumpsLens calculi

Physical/chemical removal—detergent, enzymatic digestion (e.g., proteases), chelating agents, electrophoresis[3][5][6]