Precision Diagnosys
Strictly conforming to the newest perimetry standard of IMAING and PERIMETRY SOCIETY, IFA series simultaneously fulfill the needs for opthalmological and neurological uses.
Equipped with world- wide accepted 31.5 asb background illumination, incorporated with efficient HISA, algorithm, comprehensive fixation control and age-related normal database, IFA's test result is highly consistent with Goldmann standard perimeter. Its aspheric dome effectively shrinks its size, while ensuring the full field test range.
Front Projection, More Accurate Position & Intensity
As other mainstream high-end perimeters, IFA has adopted the advanced front projection structure: one independent light source, incorporated with rotating optical system, can project the uniform
light spot on any position of the carefully prepared aspheric diffuse surface. The light spot has uniform intensity, despite of your observation angle.
Low Light-declining LED, No Replacement & Calibration
LED light source has characteristics of high efficiency, low heat, long life and low light decay. Its radiating energy reduction is less than 20% after 30,000 hours of illumination.
That is, if there is about 300 stimulus for each test, and each stimuli lasts for 200 ms, then, after 1.8 million tests, the stimulus intensity of IFA has attenuated less than 1 dB.
However, to ensure foolproof, IFA has built a light measuring sensor internally and any abnormal changes of the lighintensity have been under control.
