Peripheral defocus lenses: an option to slow the progression of myopia

14/10/2025

Options available for correcting myopia

Myopia correction can be carried out with glasses, contact lenses, or surgery (in adults), all with excellent results.

Why it is important to slow its progression

The prevalence of myopia around the world is increasing at an alarming rate. It currently affects 23% of the global population, and forecasts indicate that this will rise to 50% by 2050. High myopia carries a greater risk of developing conditions associated with myopia, such as retinal detachment, glaucoma, cataracts, and myopic maculopathy, which can lead to low vision.

Therefore, the search for effective solutions for myopia control has become essential. At present, there are three types of measures to slow its progression: behavioural measures (good visual habits), pharmacological treatments (atropine eye drops), and optical measures, which have been shown in numerous studies worldwide to slow this progression.

What are peripheral defocus lenses?

Function and optical design

Peripheral defocus lenses are a type of contact lens or spectacle lens specifically designed for myopia control from early childhood until the end of puberty. This innovative technology has generated great interest in the field of ophthalmology due to its potential to slow the progression of myopia in children and young people. These lenses are designed to create a controlled blur in the periphery of the visual field while maintaining clear vision in the centre.

How they act on eye growth

The peripheral defocus induced by these lenses triggers a “growth delay” response in the elongation of the eye, which helps to reduce the progression of myopia.

Who can use these lenses?

Prior evaluation by a specialist

It is important to emphasise that peripheral defocus lenses must be prescribed by an ophthalmologist specialising in myopia control. A complete eye examination will determine whether the patient is a suitable candidate for this type of lens.

Importance of follow-up and adaptation

In addition, regular follow-up and proper adaptation of the lenses are essential to ensure their effectiveness and safety.

Complementing treatment with good visual habits

Time outdoors and visual rest

Although peripheral defocus lenses have been shown to be effective in controlling myopia, there are other behavioural factors that also influence its progression. The most important factors we can address are spending more time outdoors and limiting screen use. It is recommended to spend at least two hours a day outdoors, and for near-vision activities, to follow the 20-20-20 rule: every 20 minutes of close work, rest for 20 seconds by looking at an object 20 feet (6 metres) away.

Early prevention and control of myopia can make a great difference to long-term visual quality and reduce the risk of associated ocular complications.

Dr Anna Monés, ophthalmologist, Barraquer Ophthalmology Centre