Single-dose eye drops

Single-dose eye drops are eye drops packaged in small, sterile, disposable vials intended for single use. Each vial usually contains between 0.3 and 0.5 millilitres of liquid, just enough for one or two drops per eye. After use, you should dispose of the vial, even if there is a small amount of liquid left inside.

The key feature of single-dose packaging is that the liquid contains no preservatives. Preservatives are normally added to multi-dose bottles to prevent bacteria and fungi from multiplying once the bottle has been opened. As a single-dose vial is used only once and then discarded, this additive is not necessary. The solution remains sterile until you open the vial.

Single-dose eye drops are often used by people with sensitive eyes or by contact lens wearers, as preservatives can sometimes cause irritation or an allergic reaction. Even with regular or long-term use of eye drops, a preservative-free version may be gentler on the surface of the eye.

When to use single-dose eye drops

Single-dose eye drops are often chosen for dry, irritated or sensitive eyes, and when wearing contact lenses. As the solution contains no preservatives, there is less risk of further irritation. At SMEYEL , you’ll find a wide range of moisturising eye drops, including preservative-free varieties in single-dose packaging.

A single-dose variety can also help relieve discomfort caused by hay fever or other forms of allergic irritation, as it rinses the surface of the eye without adding preservatives that could exacerbate the irritation. Please bear in mind, however, that eye drops do not cure or prevent an allergic reaction; they are intended to moisturise and rinse the eye. If you have persistent symptoms or are unsure, please have them assessed by your optician, optometrist or ophthalmologist.

Advantages of single-dose packaging

• No preservatives: suitable for sensitive eyes and long-term use.
• Sterile: each bottle is sealed and is only opened just before use, thereby minimising the risk of contamination.
• Handy when you’re out and about: the small bottles are easy to carry, so you don’t need to take a large bottle with you.
• No shelf life after opening: you don’t need to keep track of when you opened the bottle, as you simply throw it away after use.

Disadvantages and practical considerations

Single-dose eye drops are often more expensive per drop than multi-dose bottles, as each unit is produced and packaged separately. They also generate more waste, as each bottle is discarded after a single use. For people who use eye drops several times a day, the cost can really add up.

Some single-dose bottles contain slightly more liquid than you need for a single application. You may use the remainder for a second drop or for the other eye, but never keep an opened bottle for later use; its sterility can no longer be guaranteed.

Use and storage

Only open a single-dose bottle immediately before use. Twist or cut off the cap according to the instructions for use, apply the drop without touching the eye or eyelashes, and then dispose of the bottle. Store unopened single-dose vials at room temperature, away from direct sunlight and heat, and always check the expiry date on the packaging.