Lens cleaners

Allergan enzymatic contact lens cleaner Allergan Papain Plant Tablet... 

When you dissolve sugar in water, sugar is the solute—the substance being dissolved. The substance that dissolves the solute, in this case water, is the solvent. When the solvent is water, the solution is called an aqueous solution. Many of the solutions you encounter are aqueous solutions, for example, soda, tea, contact-lens cleaner, and other clear cleaning liquids. In addition, most of the processes of life occur in aqueous solutions. 

Contact lens cleaners Proteases To remove proteins on contact lens to prevent infections. 

Uses Surfactant, wetting agent, and dispersant for chemical industry, institutional and household detergents and cleaners, metal degreasers, window, car windshields, and spectacle lens cleaners Features Compat, with anionic and nonionic substances Properties Liq, sol. in water (forms cloudy sol n.), isopropanol, wh, min, spirits, and xylene sp, gr, 1.1 pH (5% aq.) surf tension (0.1% distilled water) 29 mN/m 60% cone. 

Amidex CO-1 Glascol Ell dispersant, spectacle lens cleaners Lutensit A-BO dispersant, spice blends... 

Contact lens care products can be divided into three categories cleaners, disinfectants, and lubricants. Improperly cleaned lenses can cause discomfort, irritation, decrease in visual acuity, and giant papillary conjunctivitis (GPC). This latter condition often requires discontinuation of lens wear, at least until the symptoms clear. Deposits can also accumulate preservatives from lens care products and produce toxicity and can act as a matrix for microorganism attachment to the lens [317]. Thus, cleaning with the removal of surface debris, tear components, and contaminating microorganisms is one of the most important steps contributing to the safety and efficacy of successful lens wear [318]. 

Enzymatic cleaners contain enzymes derived from animals, plants, or microorganisms. Plant and micro-organism-derived enzymes may cause sensitization in many lens wearers [322], A list of commonly used enzymes is provided in Table 10. All of these enzymes are effective in removing deposits from the contact lens surface [323]. They are biochemical catalysts that are specific for catalyzing certain chemical reactions. Those... 

Marketed lens care products fall mainly into the following categories cleaners, disinfectants, lubricants, and multipurpose products. Cleaners are subdivided into daily or weekly cleaners. Disinfectants comprise solutions containing chemical antimicrobial agents, which do not require heating the lenses, and preserved or unpreserved saline solutions, which are used with an electrical thermal device for lens disinfection. These products are also used to rinse contact lenses. Lens lubricants are intended to enhance the comfort of lens wear and are used prior to insertion and during wear. Multipurpose solutions are intended to accomplish... 

Most of the cleaners marketed are out-of-the-eye cleaners however, in recent years there has been a trend to try to develop cleaners for use while the lenses are inserted. A specific instance where such products could be beneficial is the case of the extended-wear lenses, which are not removed daily but are worn up to a week at a time. Generally, these cleaners are less effective in removing deposits already formed on the lens surface. However, they may play a role in retarding deposit formation. 

Cleaners for lens wearers are used either on a daily or weekly basis and are fairly innocuous. Even upon gross misuse, they are not likely to be sight-threatening. Professional cleaners, however, are potent as well as toxic if not used properly. They are also more likely to damage the lens if used too frequently. 

Deposit-shearing particles are incorporated in suspension form in some daily cleaners. These formulations are more effective than daily surfactant cleaners as they are capable of removing tenaciously bound and denatured deposits. Some of the marketed products contain polymeric beads or silica. When used as recommended, these products are very effective and do not scratch the lens surface. 

Solvents such as isopropyl alcohol have been incorporated in daily cleaners to aid in removing lipid type of deposits. Such solvents have been reported to affect certain lens materials, especially silicone acrylate rigid gas-permeable lenses. 

Begley CG, Paraguia S, Sporm C. An analysis of contact lens enzyme cleaner. J Am Optom Assoc 1990 61 190-193. 

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