Self-optimised vision correction with adaptive spectacle lenses in developing countries.
It is estimated by the World Health Organization that about 1 billion people in the developing world would benefit immediately from distance vision and near vision correction if it were available to them. Here we address this problem and provide a solution by correcting vision in the field with adaptive liquid-filled variable focus lenses. We describe the details of the lens and present the results of a series of experiments performed in Ghana, Nepal, Malawi and South Africa that demonstrate that it is possible by simple means to self-determine and obtain correct refraction using such lenses.
Douali
M G
MG
Department of Atomic and Laser Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, UK.
Silver
J D
JD
D000293:Adolescent; D000328:Adult; D001251:Astigmatism / Q000453:epidemiology / Q000503:physiopathology / Q000534:rehabilitation; D003906:Developing Countries; D004867:Equipment Design; D005139:Eyeglasses; D005869:Ghana / Q000453:epidemiology; D006801:Humans; D008295:Malawi / Q000453:epidemiology; D008875:Middle Aged; D009390:Nepal / Q000453:epidemiology; D012029:Refraction, Ocular / Q000502:physiology; D012030:Refractive Errors / Q000453:epidemiology / Q000503:physiopathology / Q000534:rehabilitation*; D012648:Self Care / Q000379:methods; D013019:South Africa / Q000453:epidemiology; D015348:Vision, Binocular / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology