the FOCOMETER Fact sheet

The FOCOMETER was developed by Drs. Ian Berger and Larry Spitzberg at the University of Houston College of Optometry in Houston, Texas to provide a subjective refraction without the need for electricity or complicated protocols. The portable, hand-held instrument is highly appropriate for use in remote and poor areas. It is manufactured by and available from InFOCUS, a non-profit organization with a mission to provide primary eye care to poor and hard-to-serve populations. Click here to purchase online.

Based on Badal optics, the FOCOMETER® allows the patient to view a real, unmagnified target, and bring it into focus, with a direct reading of spherical correction on a linear diopter scale.

Measurement of cylinder for astigmatism is easily accomplished, utilizing a "clock target" supplied with the instrument.

"Add" power requirements for presbyopes can also be measured, simply by first obtaining the distance correction and then adding plus power in small increments until a target at the desired "near" distance is clear.

In extensive field testing, the FOCOMETER® was found to be as accurate as other methods of subjective refraction and retinoscopy. Field test data were published in Optometry and Vision Science (April 1993).

The FOCOMETER® is patented and registered with the F.D.A.

Utilized in over 40 countries, the FOCOMETER® is manufactured by InFOCUS, a non-profit international primary eye care development organization based in Houston, Texas.

The design eliminates the need for many pieces which could be lost or broken and may be difficult to replace.

Many clinicians in the USA and other developed countries find the FOCOMETER® useful for over-refraction of contact lens wearers and for patients ordinarily difficult to refract, such as patients with keratoconus.

Contact InFOCUS to order a FOCOMETER,® to learn about donating a FOCOMETER® to a colleague in a developing country, or with any questions that you may have about the FOCOMETER® or primary eye care.