Perimetry Instrument

1. Spherical radius: 175mm ± 5mm
2. Stimulus light intensity: 0-10000asb (± 10%)
3. Projection light: red, blue, white (wideband visible light).

Cable connection of stimulator and computer mainframe as below
Stimulator Rear Interface (this is for model APS-T90)

Diopter correction: when checking 30 degrees field vision, to make sure the stimulating cursor focused on the retina accurately, the testing eye must be carried out refractive correction.

Central fixation lamp – located in the Bowl center, applicable for most patients checking.
Small diamond fixation lamp - located under the center target,

During the progression of the disease, most patients have no pain, no itching, and vision will not be affected much.