Wearing soft contact lenses (whether monthly or bi-monthly) offers unparalleled freedom in daily life. However, this freedom comes with an unavoidable requirement: the rigor of maintenance. Poor hygiene or an ill-suited product directly exposes your eyes to the risks of severe infections, dry eyes, or allergies.
When faced with the shelves of your optician, the choice generally boils down to a duel: the peroxide-based oxidising solution on one side, and the multifunction "all-in-one" solution on the other.
So, should you opt for the formidable efficiency of peroxide or the practicality of the all-in-one? A complete breakdown to make the best choice for your eyes.
1. The "All-in-one" solution (Multifunction): The reigning simplicity
Multifunctional solutions, commonly referred to as "all-in-one", are the best-selling and most widely used around the world. As their name suggests, they centralise all the necessary actions in a single bottle.
How does it work?
This unique liquid allows you to clean, degrease, rinse, disinfect and preserve your lenses.
The Advantages:
Absolute practicality: A single bottle to carry while travelling or to keep in your bathroom.
Safety of use: In case of accidental direct contact with the eye, it stings, but there is no risk of chemical burn.
Flexibility: Possibility to rinse the lens just before insertion.
The Disadvantages:
Presence of preservatives: To keep the product sterile in its bottle, preservatives are added. Some sensitive or allergic eyes may not tolerate them well over time.
Limited antimicrobial effectiveness: It requires a prior mechanical step (rubbing the lens in the palm of your hand) to effectively remove lipid and bacterial deposits.
2. Hydrogen Peroxide: The purity and high disinfection option
Hydrogen peroxide-based systems (usually dosed at 3%) are powerful oxidising solutions. They are aimed at wearers seeking impeccable hygiene or those with particularly reactive eyes.
How does it work?
Peroxide is a formidable disinfectant. However, it is strictly forbidden to put it directly in contact with the eye under penalty of causing a corneal burn. This is why these solutions must be used with a specific case equipped with a catalyst disc (in platinum) or neutralising tablets.
The peroxide destroys microbes and proteins overnight, then gradually transforms into a neutral saline solution without preservatives after a minimum of 6 hours.
The Advantages:
Maximum disinfection: Nearly total elimination of bacteria, fungi and allergens. Ideal for people prone to allergies or excessive secretions.
Zero preservatives: Once neutralised, the lens bath contains no aggressive chemical agents, providing unparalleled comfort in the morning for sensitive eyes.
No mandatory rubbing: The effervescence of the peroxide cleans the lens deeply without the mechanical action of fingers (thus reducing the risk of tearing).
The Disadvantages:
Time constraint: It is imperative to respect a strict soaking time (generally 6 hours). If you put a lens back in before the end of neutralisation, the burning sensation is immediate and intense.
Rigidity of the process: Forget using a standard or improvised case. If the catalyst disc is worn (remember to change the case with each new bottle!), the product does not neutralise.
Comparison table: At a glance
| Criteria | All-in-one solution | Peroxide solution |
| Main action | Practical and versatile | Deep disinfection and purity |
| Presence of preservatives | Yes | No (after neutralisation) |
| Manual rubbing required | Recommended (strongly advised) | No |
| Minimal exposure time | Often 4 hours | 6 strict hours |
| Risk in case of mishandling | Discomfort / slight irritation | Chemical burn of the cornea |
| Ideal profile | Versatile, busy user | Sensitive, allergic eyes, lovers of great comfort |
The optician's verdict: Which one to choose?
There is no "bad" product, there is mainly the product suited to your physiology and your lifestyle.
Opt for the all-in-one if you are looking for ease of use, travel often, and are used to thoroughly rubbing your lenses every evening.
Opt for the peroxide if you feel discomfort at the end of the day, if your eyes easily redden, if you are prone to seasonal allergies, or if your vision specialist has recommended it to eliminate deposits more effectively.
Golden rule: Never change your maintenance system (switching from all-in-one to peroxide or vice versa, or changing brand) without the advice of your ophthalmologist or optician. Some solutions are not compatible with all silicone-hydrogel lens materials.
A question about the health of your eyes or need personalised advice for your lenses? Come and see us in store or contact our team of experts for a tailored eye test.