Contact lens lipid deposits

Contact lens lipid deposits refer to the accumulation of various lipid species from the tear film onto the surface and within the matrix of contact lenses during wear (Lorentz & Jones, 2007). These deposits primarily originate from the meibomian glands and include non-polar lipids like wax esters and sterol esters, as well as polar lipids like phospholipids (Jones et al., 2003). While these lipids are essential for tear film stability on the ocular surface, their deposition on lenses can lead to reduced wettability, visual blurring, and physical discomfort for the wearer (Stapleton et al., 2017). Furthermore, lipid spoilation can alter the lens's surface properties, potentially promoting the adhesion of bacteria and increasing the risk of inflammatory responses such as contact lens-induced papillary conjunctivitis (Panjwani, 2001). Management of these deposits typically involves the use of surfactants in contact lens care solutions, such as poloxamers, which emulsify and remove the lipids to maintain lens performance and ocular health (Jones et al., 2003).

Other names

Tear film lipid depositsLipid spoilationMeibomian lipid depositsContact lens fouling

Surfactants interact with lipid deposits through emulsification and solubilization, where hydrophobic tails bind to the lipids and hydrophilic heads allow the complex to be rinsed away in aqueous solution (Jones et al., 2003).