Eye Focus

Holographic Technology

A hologram is similar to a photograph, but the viewer sees the image
in three dimensions.

The need for glasses is checked by using a letter chart and lenses.
Different lenses would be placed in front of the eye in sequential
pattern whilst the patient is looking at the letter chart at a distance.

The prescription is determined when the best vision is seen on the
letter chart and with a certain lens combination.

A special hologram was designed to incorporate a letter chart but in
three dimensions. Instead of using lenses, the viewer can look into the
hologram and by determining which part of the letter chart is most
clear, the prescription is determined within a few seconds.

Studies have been done to show that the technique is both as accurate
and reliable as an eye test in an optometrist's clinic.

Holograms are relatively cheap to manufacture, and the technology
could be adaptable to be used for different applications such as testing
for the focusing strength of the eye (accommodation), other focusing
errors of the eye (such as astigmatism)and much much more.

This holographic technology is cheap, can be used with minimal
training, and can measure the need for glasses accurately and reliably.