Large Pupil Zone Imaging Method
The large pupil zone imaging method enables the measurement of wide area refraction of up to 6 mm diameter and
can indicate the difference between wide area refraction and the central area refraction of up to 3.5 mm diameter. The
pupil diameter is measured simultaneously. The difference of the measurement allows assessment of the effect of pupil
size such as a vision in dim light.
Super Luminescent Diode and Highly Sensitive CCD
Incorporation of the Super Luminescent Diode (SLD) provides a sharper and clearer image compared to a conventional
LED. The highly sensitive CCD detects the ring image even if the fundus reflection is weak. The system combining the
SLD and highly sensitive CCD significantly improves measurement capability even in dense cataractous eyes.