Myopia (short-sightedness) can be better controlled through the use of bifocal lenses rather than with single-vision glasses, according to Hong Kong Polytechnic University research.
In a study of 135 myopic Chinese Canadian children, those who wore bifocal lenses had a 38 per cent slower rate of myopia than their single lens-wearing counterparts.
Those wearing special bifocals with a "prism" a substance imbedded into the lenses to help the eyes coordinate better with each other - achieved a 58 per cent slower rate than those with single lenses.
Desmond Cheng, the lead author of the paper, told the Los Angeles Times in an email: "The modest benefit should be weighed against factors such as the increased cost of the lenses, poor cosmetic appearance and attitude of the parent and child if bifocal spectacles are to be prescribed for the purpose of controlling myopia."
Dr Cody Jones, an optometrist at Complete Family Eye Care in the US, recently highlighted the importance of eye tests for young children to identify and correct problems as soon as possible.
by Alexa Kaczka