Boston One Step Liquid Enzymatic Cleaner

June 2025

We have stocked the product in the past and are very pleased to finally be bringing it back again.

Boston One Step is a popular add-on for scleral lens patients who use Boston Simplus for daily disinfection. Boston One Step comes in single use vials that look a lot like artificial tears. Once a week, you use one vial to add two drops to each side of your case - after rub-cleaning your lenses, rinsing them and putting them in your case and filling it up. It does its thing overnight while your lenses are disinfecting.

SAFETY NOTE: Store this separately from any artificial tears! The vials are exactly the same. You definitely do not want to get this product in your eyes!

Boston® One Step Liquid Enzymatic Cleaner is a simple and convenient way to effectively remove protein deposits weekly from rigid gas permeable contact lenses to help maintain contact lens wearing comfort.

Label information

Key Features & Benefits

• Deep Cleaning & Protein Removal – Effectively breaks down and removes protein deposits that can impair lens clarity and comfort.
• Convenient One-Step System – Works directly in your lens case during disinfection, eliminating the need for separate enzymatic cleaning vials or tablets.
• Preservative-Free Formula – Reduces the risk of irritation for sensitive eyes.
• Enhanced Comfort – Regular use helps maintain lens hydration and smoothness, preventing protein buildup that can cause discomfort.
• Compatible with Boston® Conditioning Solutions – Designed to be used with Boston® Conditioning Solution or Boston ADVANCE® Comfort Formula Conditioning Solution for a complete cleaning and disinfection process.

Directions for use (use weekly)

1. After daily cleaning (with Boston® Cleaner or Boston ADVANCE® Cleaner) and rinsing, place lenses in lens case and fill to top with any fresh Boston® Conditioning Solution or Boston ADVANCE® Comfort Formula Conditioning Solution. It is important that the lens case is completely filled with fresh solution to ensure proper dilution of the Liquid Enzymatic Cleaner to reduce any chance of irritation.
2. Detach one container from the strip by pulling the tab toward you from the top to the bottom. To open, twist the tab off the single-use container. Squeeze container to release 2 drops of Boston One Step Liquid Enzymatic Cleaner into each lens well already filled with Conditioning Solution. Soak lenses for at least 4 hours (or overnight) before wearing and to ensure proper cleaning and disinfecting. Always use fresh solution for soaking and storing lenses. Discard container immediately after use. 
3. After removing lenses for approximately 5 seconds with any Boston Conditioning Solution to ensure that the enzymatic cleaner is thoroughly rinsed off the lenses. DO NOT USE TAP WATER FOR THIS FINAL RINSE.
4. Apply fresh Conditioning Solution to wet the lenses for additional cushioning, if desired, and insert. 
5. Discard solution from the lens case immediately and thoroughly clean interior of lens case with a sterile disinfecting solution and air dry after each use. 

Ingredients

•  Active Ingredient: Proteolytic enzyme (subtilisin) – Breaks down and removes protein deposits that can accumulate on the lens surface.
• Glycerol: Helps stabilize the enzymatic solution.

Contraindications

• Do not use this solution if you are allergic to any ingredient in this product.
• Not For Use With Soft (Hydrophilic) Contact Lenses. 

Important Safety Information

• Always follow the product directions for use. Failure to follow product directions may lead to vision loss. 
• Visit your eye care practitioner regularly. 
• Always wash and dry hands before handling lenses. 
• Do not use tap water, bottled water or saliva with lenses or lens care.
• Only use fresh solution to clean and disinfect contact lenses. 
• Always discard any remaining solution in your lens case after each disinfection cycle.
• Saline solution or rewetting drops will not disinfect your lenses. 
• Always replace your solutions, lenses and lens case as directed. 
• To avoid contamination, do not touch tip of container to any surface.
• Not for use with heat (thermal) disinfection. 

Precautions

• To ensure proper hygiene and handling of contact lenses and contact lens solutions, always follow label directions carefully. 
• Always discard solutions from lens case after each use. 
• Discard container immediately after use. 
• Store solution at room temperature. Do not freeze. 
• Use before the expiration date marked on the carton. 
• Keep out of reach of children.
• Never soak lenses in Boston One Step Liquid Enzymatic Cleaner Only.
• Never place more than 2 drops of Boston One Step Liquid Enzymatic Cleaner into each lens well.  

Adverse Effects: The following problems may occur

• Eyes stinging, burning, itching (irritation)
• Excessive watering (tearing) of the eyes
• Unusual eye secretions
• Redness of the eyes
• Reduces sharpness of vision (visual acuity) 
• Blurred vision
• Sensitivity to light (photophobia)
• Dry Eyes

If you notice any of the above conditions, immediately remove and examine lenses. If the problem stops and lenses appear to be undamaged, thoroughly clean, rinse and disinfect the lenses and reinsert. 
If the problem continues, IMMEDIATELY remove the lens of if a lens appears to be damaged DO NOT REINSERT. Contact your eye care practitioner immediately. 
If any of the above problems occur, a serious condition such as infection, corneal ulcer, neovascularization or iritis may be present. Seek immediate professional identification of the problem and treatment to avoid serious eye damage.