Thai people who wear contact lenses have been advised to be careful due to the way the contact lenses are sold in the country.
Speaking to the Bangkok Post, ophthalmologist Tisha Prabriputaloong explained that in Thailand, contact lenses are easy to buy in shops from staff who are not opticians.
As a result, it is easy to wear contact lenses that do not fit properly or are not the correct prescription.
Dr Tisha urged people to get a prescription before buying contact lenses and also stressed the importance of keeping them clean and caring for them properly, not using water or saliva instead of solution.
In addition, she warned that novelty items known as "big-eye contact lenses" are not tested for quality and doubts remain about the material used to make them.
Meanwhile, Asian publication the Straits Times has reported a warning by the Singaporean Ministry of Health to unlicenced blogshops to cease selling contact lens products.
They have been threatened with imprisonment and fines if they carry on such trading without the required qualifications.
by Alexa Kaczka