All you need is a good contact lens solution, a contact lens case, a pair of soft plastic tweezers and a couple of minutes.įirst of all, you should use a proper contact lens solution for cleaning your colored lenses and storing them at night. Whether you wear Freshlook color contacts, Acuvue 2 Colors, Expressions Colors, or custom-made color or special effect lenses, caring for them is exactly the same.
#Good contacts cleaner how to#
Discover how to care for your colored contacts simple and fast. However, it is very important to take proper care of your color contacts, otherwise your eyes can become irritated or even infected. National Center for Biotechnology Information.Caring for color contact lenses is not at all difficult. PH consistency and stability of contact len… – PubMed – NCBI. PH OF MULTIPURPOSE CONTACT LENS SOLUTIONS OVER TIME. National Center for Biotechnology Information. The pH of multi-purpose soft contact lens solu… – PubMed – NCBI. Retrieved May 7, 2013, from Ĭontact Lenses in Ophthalmic Practice – Google Books. Ĭlinical Contact Lens Practice – Google Books. It was reported that a parasite had grown onto a contact lens and was eating through this girl’s left eye. There have been cases where contact lenses have destroyed or harmed people’s eyes.
Many people stick to wearing glasses because they are fearful of the dangers of wearing contact lenses.
The K a is simply indicating the acidic equilibrium and is used when a weak acid is present.Ĭontact lens solutions can not ensure that your contact lenses are safe to wear. Some buffering agents are more soluble than others and can be bases or acids. That helps maintain the equilibrium between your eye and the lens.īuffering agents such as citrates, phosphates, borates and trimethamines are used to stabilize the pH level between 7.0 and 7.4.Įg: Boric acid in water : B(OH) 3 + H 2O B(OH) – 4 + H + K a = 5.8×10 −10 mol/līoric acid is an example of a borate used as a buffering agent. Contact lens soluti ons have high buffering capacities, which means that they highly resist pH changes. The pH value of the liquid layer which bathes the cornea and conjunc tiva of our eyes ranges from 7.0 to 8.5, therefore the pH of contact lens solutions should ideally be between 6.0 and 8.5 to ensure ocular comfort. The lowest pH value that our eyes can tolerate is 6.2 and the highest is 9.0 at a strength of 0.2 mol/L. If the solution is hypertonic, the opposite will happen dryness is exhibited. Water always moves to areas of higher tonicty, which would be in your cornea. If your eye swells up because there is an excessive accumulation of water, it may be because the contact lens solution is hypotonic meaning that it contains a lower concentration of NaCl. Therefore, it is important that the contact lens solution be isotonic too. An equilibrium is to be maintained between the ocular tissues and the water in the lens. The contact lenses that we wear have been formulated to be isotonic, which means that they have the same osmotic pressure as the tear film in our eye (layer of lubricant bathing the cornea and conjunctiva of the eye). An equilibrium has to be maintained such that if the concentration of other salts increases, the concentration of NaCl would have to be decreased. For instance, an ideal contact lens solution should contain 0.9% NaCl (sodium chloride). The tonicity of a solution depends the quantity of salt it contains. In order for contact solutions to effectively replenish lenses, an equilibrium has to be maintained in the tonicity, buffering agents, and degree of acidity and alkalinity in water (pH), and viscosity etc. These ingredients are used to kill bacteria, microbes, calcium buildup and disinfect in general.
There are numerous other ingredients such as benzyl alcohol, edetat e disodium, polyaminopropyl biguanide and chrlohexidine gluconate. Hydrogen peroxide equation: H 2O 2 H +1 + HO 2 -1 The primary ingre die nts is hydrogen peroxide. Th e comfort experienced by w earing contacts differs from person to person.Ĭontact Lens Solution Ingredients and PropertiesĬontact lens solutions are used to cleanse and disinfect lenses. Contact lenses have become a very popular and convenient alternative to eyeglasses.
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