Frequently Asked Questions
Q1. What is FoFo?
Q2. How to use the device?
Q3. What's the price of FoFos and where can I buy them?
a. As a set of 3 FoFos, each set costing Rs. 1180 (17 USD) including taxes. Inside the box set, you will find 3 assembled devices and 3 targets.
Indian residents can purchase these sets from Amazon.in (free shipping). For shipping outside of India, please fill the form here. Our team will get back to you with the pro forma invoice and payment details. Please note that in this case, shipping charges are extra and payable before the devices are shipped.
b. As single FoFos inside flat envelopes, each costing Rs. 500 (7 USD) including taxes. Here, the device (along with its target) comes ready-to-assemble. It can be quickly put together with the help of the instruction pamphlet included in the envelope.
Single devices are available for in-person purchase at the LVPEI KAR campus in Hyderabad, Indi However, bulk orders would be considered for shipment on a case-by-case basis. For inquiries, please write to us at firstname.lastname@example.org.
Q4. Where does my purchase go?
Q5. Can I buy glasses based on FoFo's readings?
Q6. What do the graduations and numbers on the scale mean?
The plus sign denotes farsightedness (Hyperopia), a condition in which you can see distant objects clearly, but objects nearby may be blurry. For instance, if FoFo reads +1 D, then you have one diopter of farsightedness. Meanwhile, +4 D indicates more farsightedness and you might need more powerful glasses.
The minus sign denotes nearsightedness (Myopia), a condition in which you can see objects near to you clearly, but objects farther away are blurry. For instance, -1 D indicates one diopter of nearsightedness and -4 D indicates more nearsightedness.
If FoFo reads 0 D, it means you have a normal vision (emmetropia) and do not require any correction. However, make sure that both the eyes are tested with FoFo for at least 3 times before drawing any conclusions.
Q7. The readings show only +0.5/-0.5 diopter error. Do I still need a further examination?
However, in children, even a mild refractive error reading must be taken very seriously. Read question no.8 to learn why.
Q8. How does the refractive error affect school children and how does FoFo help them?
Unfortunately, most kids don't realize their vision problem and hardly complain about it. Conducting vision screening programs in schools requires trained professionals, expensive equipment, and incurs cost and time. This often creates a roadblock in reaching these children in need, especially at rural schools. FoFo strives to change this by offering a simple, accessible and affordable solution. We train the rural school teachers to use FoFo on their students and screen them for early-onset refractive error. Those children with vision defects are recommended for further examination at the nearest eye care facility.
Q9. Can I make a donation instead of buying the device?
Q10. What if the target does not become clear at any point? / Can FoFo measure astigmatism? / Can FoFo measure cylindrical power?
Q11. What's the durability of the device?
Q12. How to maintain the device?
Q13. Is FoFo safe to use?