Halloween contact lenses: 6 of 47 cosmetic lens websites met UK law

In a February 2023 check, only 6 of 47 websites selling cosmetic contact lenses complied with section 27 of the Opticians Act 1989. Section 27 allows a zero powered contact lens to be sold only by or under the supervision of a registered medical practitioner, a registered optometrist or a registered dispensing optician.

No study here looks at Halloween contact lenses as such. In a web survey of 3,803 women in Japan, buying lenses online or in a shop rather than from an eye clinic or hospital was associated with more self-reported eye problems needing care.

What the Japanese survey did

In November 2018, a market research company surveyed 4,000 lens-wearing women aged 16 to 49, chosen at random from its Japanese panel. Of the 3,803 analysed, 1,833 wore cosmetic lenses (colour-enhancing, opaque or limbal circle) and 1,970 wore clear lenses. They reported where they bought lenses, how they wore them, and whether tearing, pain or blurred vision from a lens had sent them for eye care in the previous year. Japan's medical research agency funded it, and one author declared contact lens industry funding outside the work.

What it found

Cosmetic and clear lens wearers reported a problem about as often (35.7% against 33.4%), and lens type was not associated with problems before or after adjustment (adjusted odds ratio 0.95, 95% CI 0.81 to 1.11). Compared with buying from an eye clinic or hospital, buying online was associated with more problems (adjusted odds ratio 1.23, 95% CI 1.05 to 1.45), and so was buying in a shop (1.28, 1.06 to 1.54). So were replacing lenses late (1.53) and sleeping in them (1.25). Half the cosmetic lens wearers bought online (50.9%, against 25.3% of clear lens wearers).

Who presents with a cosmetic lens infection

Over 12 months at 11 centres in eight Asian countries, cosmetic lens wearers made up 204 of 694 patients with a contact lens corneal infection (29.4%). They were more often female (90% against 59%) and under 25 (68% against 44%), and newer to lenses. Presenting disease and visual outcomes were similar in both groups, but Acanthamoeba caused 9% of the cosmetic lens infections, against 1% of the others.

In a smaller French study in 12 university hospitals from 2007 to 2009, 32 of 256 patients with a contact lens infection (12.5%) had worn cosmetic lenses, rarely dispensed by eye care professionals. Final acuity was worse than 20/200 in 60% of the cosmetic lens cases, against 13% of the others. These two studies and the website check are open only as abstracts, and nothing here goes beyond them.

In Birmingham and Nottingham from 2016 to 2020, 35 of 66 culture-proven Pseudomonas keratitis cases were in contact lens wearers. Of those, 94.3% ended with a corrected distance visual acuity of 6/24 or better, which the authors say was likely due to milder disease at presentation and timely management.

I found no UK count of costume lens infections around Halloween. In a series of 861 severe keratitis admissions in Toulouse from 2016 to 2021, published in September 2026, contact lens cases peaked in summer: 103 of 277, against 63 in autumn.

What UK law says about Halloween contact lenses

Giving a lens away still counts as selling it, and the seller must make arrangements for the wearer to receive aftercare, in so far as and for so long as is reasonable. Selling in breach of the supervision rule can bring a fine of up to level 5 on the standard scale. In the 2023 check, 13 of 49 brands on sale (26.5%) had no CE marking.

Why it matters in practice

• Ask a young patient with a red eye about coloured or costume lenses by name. In both hospital studies, cosmetic lens wearers were younger and newer to lenses, and I suspect a pair worn for one night is easy to leave out of a history.
• Ask where the lenses came from and how they were worn, including whether they were slept in.
• Treat a painful red eye in a costume lens wearer as contact lens keratitis until shown otherwise, with Acanthamoeba on the list. The Midlands authors think timely management helped their patients, and this week's piece on firework eye injuries makes the same case for early care.
• Tell parents to buy costume lenses only where the sale is made by or under the supervision of a registered medical practitioner, a registered optometrist or a registered dispensing optician. A lens that leaves an eye red and painful should come out, and the eye should be seen that day.

The caveats

• The Japanese survey is cross-sectional and self-reported, in women recruited online, with no data on lens brands. A problem meant seeking eye care, not a confirmed infection.
• Its categories (eye clinic or hospital, shop, internet) do not match the UK's line between supervised and unsupervised sale. Its authors warned that counterfeit cosmetic lenses could harm young women disproportionately.
• The French and Asian studies report outcomes differently, so the contrast is only suggestive.
• Neither 2026 study separates cosmetic lenses, and Toulouse counted only severe cases admitted to one hospital.

Sources

1. 1.A web-based survey of contact lens-related adverse events among the Japanese female population · Scientific Reports, 5 August 2021
2. 2.Opticians Act 1989, section 27: sale and supply of optical appliances · legislation.gov.uk
3. 3.Cosmetic Contact Lenses in the United Kingdom: Assessment of Online Regulation and Quality of Consumer Health Information · Eye & Contact Lens, 13 March 2024
4. 4.Cosmetic Contact Lens-Related Corneal Infections in Asia · American Journal of Ophthalmology, 13 March 2021
5. 5.Microbial keratitis as a foreseeable complication of cosmetic contact lenses: a prospective study · Acta Ophthalmologica, 15 March 2011
6. 6.Severe Infectious Keratitis Among Inpatients at an Emergency Tertiary Hospital Ophthalmology Department in France · Eye & Contact Lens, 16 September 2026
7. 7.Contact lens-related versus non-contact lens-related Pseudomonas aeruginosa keratitis: The Midlands Infectious Keratitis Study · Frontiers in Medicine, 10 July 2026