About 4,000 boxes of Johnson & Johnson's Acuvue disposable contact lens in Hong Kong are being recalled after users in Japan complained of eye irritation or discomfort. Hong Kong and Macau have joined a voluntary recall in the region after a 'limited number' of complaints last month in Japan of 'unusual stinging or pain upon insertion' when using 1-Day Acuvue TruEye made in Ireland, a Johnson & Johnson (Hong Kong) spokeswoman said. No complaints have been received so far in Hong Kong. Some of the complaints in Japan were associated with ocular redness but long-term problems were unlikely, she said. She advised people to stop using the affected product and contact eye specialists. An investigation found 'an isolated issue in one portion of the lens rinsing process on a particular manufacturing line' had affected 16 lots. The first six digits, found on the packages, of the affected lots are: 492237, 492238, 492241, 492245, 492250, 492251, 492252, 492254, 492268, 492280, 492281, 492282, 492283, 492287, 492288, 492289. The company has suspended shipment of the affected lots. Users can bring the affected product, along with the original packaging, to an eye care professional or optical shop from Monday until September 22 to exchange for other products. Additional information on the recall is available on the company's website at www.acuvue.com.hk , or through a hotline at 2963-6799 from today until September 22 between 9am and 6pm. The company spokeswoman said no other products under the brand were involved. The Department of Health was notified and it is monitoring the recall.