Contact lens wearers are being warned about contaminated batches that could scratch their eyes.

There are concerns that some Johnson & Johnson Acuve daily contact lenses may have rogue particles on them, or in the blister solution.

If people do not notice the particles before the lenses are put into their eyes, they could cause redness, discomfort, or even damage the surface of the eye itself.

Although there have been no serious incidents to date, problems have been reported in a "low level of stock" of certain batches of 1-day Acuvue Moist for Astigmatism lenses.

Johnson & Johnson has notified affected opticians and optometrists - recalling the affected lots - and has instructed them to contact patients who may have received the contaminated products.

Contact lens users who are concerned should speak to their optician or optometrist.

Customers can check if their products are affected by checking the lot number of the lens boxes against the list published by Johnson & Johnson in the company's field safety notice.

These include batches from master lots 395749, 395750 and 395751.

Specific lots affected are: 3957490102, 3957490102, 3957490107, 3957490108, 3957490109, 3957490112, 3957500108, 3957500109, 3957500112, 3957510102 and 3957510103.

Lot numbers are displayed on the back or side of each carton of 28 lenses, as well as on the foil cover of individual lenses.

Mark Birse, Medicines and Healthcare products Regulatory Agency (MHRA) group manager for device safety and surveillance, said: "Whilst the risk is low, the MHRA takes the safety of the medicines and devices we regulate very seriously. It is therefore important that as many customers as possible are made aware of the need to check their lenses for these lot numbers. Contact lens users who still have concerns should contact their optician or optometrist.

"They can also report any adverse effects to the MHRA's yellow card scheme."