Cleaning Products

What is the function of CL solution

• Loosen & or solubilise and remove contaminants (deposits) bound to or located on CL surface

• kill and/or remove majority of viable & necrotic microorganisms

• to prevent/minimise deposits

• maintain hydration and wettability

• provide comfort and clear vision

• prevent or reduce risk of ocular infection/inflammation

What are the types of CL solutions

• multi-purpose CL solutions

• Hydrogen peroxide-based care systems

• Saline solutions

• Lubricating drops

Which solutions to use for soft lenses

• multipurpose solutions

• Hydrogen peroxide (case with cobalt disc attached or tablet)

• protein removers

What solutions to use for RGP lenses?

• Cleaner and conditioner

• All in one

• hydrogen peroxide (case with cobalt disc attached otherwise tablet)

• conditioner can also be used with H2O2

Artificial tears/lubricating drops

• Saline → used to rinse residual H2O2 off

• Lubricating drops help with dry eyes or any debris or hydrating CLs

What are multipurpose solutions used for ?

• to clean, rinse , disinfect and store CL

• most popular method of CL care

• widely recommended by eye care practitioners

What are the actions of disinfectants and preservatives in MPS

• restrict growth of micro-organisms

• maintain sterility of solution remaining in bottle and CL case

• ingredient → Benzalkonium Chloride

• Polyquats → polihexadine

Actions of Chelating agents on MPS

• Enhance action of many common preservatives

• EDTA → sodium Edetate

Action of buffers in MPS

• controls pH (6-8)

• sodium phosphate

• sodium borate

What are the actions of Surfactants / Cleaning agents in MPS

• remove protein , lipids, mucin and/or debris from CL

• Improve lens surface Wettability

• Isopropyl aclohol

• Sodium borate

• Sodium phosphate

• sodium citrate

• Poloxamine

What is the action of wetting agents used in MPS

• aid solution to spread across the lens surface

• polyvinyl alcohol

• Polysorbate

• Polyvinyl Pyrrolidone

What are the actions of lubricating agents in MPS?

• helps reduce surface tension on a lens

• improves wettability

• increases viscosity

• improve lens comfort

• Hydroxypropyl

• Methylcellulose (HMPC)

What are the actions of Tonicity agents used in MPS

• Adjusts salt concentration to ensure compatibility with tears

• sodium

• potasium chloride

What do Hydrogen Peroxide solutions contain?

• NO preservatives or allergens

• breaks up proteins and removes deposits on lenses during disinfection process

• H2O2 bottles will have red or orange top as a way to identify

What is the 1-step system used ?

> 3% H2O2 concentration

> uses a catalyst → Platinum (Pt) and a carbon-coated disc

• or delayed release biological catalase-containing tablet

What is the 2-step system H202

> 3% H2O2 concentration

• uses catalase tablet

• colour indicators (cyanocoblamine) + Vitamin B12 may be included to confirm neutralisation

What are enzyme remover issued for

• remove proteins from lens surface

• tablets dissolved in saline or disinfecting solution

• Liquid form used by adding a drop in CL case with disinfecting solution

• ingredients :

• Lipase

• Protease

• EDTA

• Pacnreatin

What is the action of Saline

• Sodium chloride concentration equivalent of that to human tears

• Rinse residual H2O2 off lens

• used to rinse CL, rinse eyes

• Hydrate CLs and used in CL blisters

• 0.9% isotonic solution

What do lubricating drops alleviate discomfort from?

> Dry eye

> poorly wetting CLs

> noxius atmosphere

> rehydrate CLs

> tired and/or sensitive eyes

What should be the desired properties of Lubricating drops ?

• should be relatively slow to drain from anterior surface

• may have a viscous formula

• should be quick to act

• should have no discomfort on insertion

• should be preservative-free

Formulation fo lubricating drops ?

Natural polymers used in lubricating drops

• Bioadhesive polymers attach to pre corneal mucin layer via non covalent bonds

most common polymers → PVA, Carbomer , Hyaluronic acid