As explained by ophthalmologist Tiago César Pereira-Ferreira, Professor of Ophthalmic Surgery at the Faculdade Ciências Médicas de Minas Gerais (FCM-MG) who specializes in contact lenses, cataract, refractive surgery and keratoconus, the benefits that this type of glasses promise are meaningless. Scientifically speaking.
Screen light and natural light
“The claim that blue light is harmful to the eyes is because it is the closest thing to UV rays, but there is no definitive evidence that UV rays cause damage to the eyes. Furthermore, the amount of blue light coming from artificial sources such as computer screens is about 1,000 times less than that from natural daylight, and blue light filter lenses retain only about 10 to 25% of this light,” explains Thiago César Pereira-Ferreira.
Ophthalmologist Tiago Cesar Pereira-Ferreira says that saying that blue light is harmful to the eye comes because it is closest to ultraviolet light.
(photo: personal archive)
In order for these lenses to provide these benefits, according to Tiago Cesar, they need to be significantly darker: “The review of studies also did not find convincing evidence that these lenses actually reduce eye strain and improve sleep, which are the main promises.” of these products.
is reading: Screens: cause irreversible damage to the development of infants and children.
the recipe
The ophthalmologist also recommends limiting the use of electronic devices before going to bed and maintaining a dark and quiet environment. To control eye strain, he leaves out another piece of advice.
The main strategy is to follow the “20-20-20” rule, which involves looking away from the screen every 20 minutes, and focusing on something 20 feet (about 6 meters) away for 20 seconds. Keeping them clean and using adequate lighting are important practices.
Charlotte Whitmore is a contributor at Mediarunsearch.co.uk, covering a broad range of topics including news, politics, business, technology, sport, entertainment, and lifestyle. She focuses on delivering clear, balanced reporting and practical information that helps readers stay informed about current events and emerging developments. Her work highlights stories that matter to everyday audiences, with an emphasis on accuracy, relevance, and accessible journalism that keeps readers connected to the issues shaping the UK and beyond.