In many parts of the world, even the basics of vision care are not available.  Something as simple as a pair of spectacles are often out of reach because of cost or because no trained Eye Care Professional is available.  

To address this problem, several companies have engineered simple, yet effective, self-adjusting glasses for ordinary vision correction.

One candidate  in particular, AdSpecs, of the UK is of interest to me.

AdSpecs are based on the Alvarez lens (named after the inventor and Nobel Prize laureate, Luis Alvarez). The mechanism used to move the Alvarez lens parts was invented and patented by VU University, Amsterdam.

The power of each lens can be simply adjusted to suit the needs of the user: turn the dials to change the power of the lens and once clear vision is attained, fix the power and the eyeglasses are ready to wear.

AdSpecs can be fitted by a trained health worker in a matter of minutes. The spectacles have a dioptric range of -6 to 3 diopters and can correct up to 90% of refractive errors. With economies of scale and the latest production techniques, AdSpecs can be produced at low-cost, making them a cost-effective solution to the elimination of avoidable blindness.

Advantages of the AdSpecs :
—Can be fitted by trained health workers in a matter of minutes;
—Offer correction for up to 90% of refractive errors;
—Low cost to produce;
—Patient does not need monitoring appointments;
—Variable powers fully adjustable.

I have been developing a strategy for their production and distribution in Africa in collaboration with Christian ministries, as directed by The Holy Spirit.

To learn more about Adspecs, see: