Self-refraction is the method where an individual adjusts lenses to suit their own eyes, and is the principle that underpins Eyejusters.

Self-refraction has been validated by a number of independent peer-reviewed studies from leading institutions^1,2,3, and extensive studies of fieldwork performed in Ghana, Nepal, Malawi, Nicaragua, China and South Africa. It is reliable and effective for over 12s, with a recent independent World Bank-funded international clinical study^4,5 validating its use for over 12s.

In use, self-refraction has been found to be as accurate as other field refraction methods, such as auto-refraction, and approaches the quality of a field refractionist performing subjective refraction, the gold standard of refractive eyecare.

1. Smith et al, Optom. Vis. Sci. 87 (2010)
2. Douali & Silver, Ophthal. Physiol. Opt. 24 (2004)
3. Silver et al, S. Afr. Optom. 62 (2003)
4. He, Congdon et al, Ophthalmology 118 (2011)
5. Zhang, He et al, BMJ 343 (2011)

The Centre for Vision in the Developing World, based in Oxford, is a research centre dedicated to addressing the lack of eyecare in the developing world. The Centre was founded and is directed by Professor Josh Silver, the inventor of Adspecs (the original self-adjustable glasses).

The Centre performs the scientific research necessary to provide effective, sustainable and clinically validated vision correction in parts of the world that currently lack it, and it works closely with manufacturers and distributors to assist and assess new products and distribution services & methods.

Whatever mission your organisation has, distribution of Eyejusters is easy to implement and integrate, thanks to our comprehensive training and the simplicity of the glasses. They are particularly complementary to projects that work in areas such as:

Almost 40,000 self-adjustable glasses are already out in the world, providing clear vision to their owners. Many different organisations have used them successfully in a diverse set of locations and circumstances. Countless smaller organisations have distributed self-adjustable glasses thanks to Global Vision 2020, a US-based non-profit that provides fundraising and training assistance to smaller organisations working in the developing world.

Find out how you can get involved by clicking here.