| Customization: | Available |
|---|---|
| Classification: | Visual Electrophysiology |
| Type: | Visual Electrophysiology |
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Visual Electrophysiology Muli-Focal Visual Electrophisiology
Model: LTE-VEC
TECHNICAL DATA
| Amplifier | |
| Input Impedience | ≥ 1000 MΩ |
| CMRR | ≥ 115dB |
| Input Noise | ≤ 4uVpp |
| Filter | Full real time digital filter, band-pass, band-stop, high-pass, low-pass, comb filter apply to every channel independently |
| A/D Resolution | 24 bit |
| Port | Optical isolated USB 2.0 |
| Power Supply | Li-ion battery, switch to USB power automatically when low battery |
| Flash Stimulator | |
| Light Source Color | White, Red, Green, Blue, Yellow and any of their combination |
| Flash Luminance | Can produce 100cd·s/m2 broad-band white flash in < 4ms |
| Flash Luminance Range | 0-1000 cd·s/m2 |
| Stimuli Mode | Single, Double, String, On/Off, On duration can be adjusted |
| Background Illumination | 0-3000 cd/m2 |
| Stimuli Frequency | 0.01-200Hz |
| Fixation & EOG | 11 Fixation/EOG indicator, 64 adjustable intensity; -25 - +25 EOG saccade range |
| Monitor | Infra-red camera |
| Pattern Stimulator | |
| Luminance | 0-200 cd/m2 |
| Contrast | > 98% |
| Pattern Shape | Checkerboard, Horizontal/vertical stripes, rectangle, adjustable element angle |
| Stimuli Mode | Reversal, On/Off, String |
| Stimuli Field | Full field, left/right/upper/lower half, up-down/left-right margin; ¼ left-top/right-top/left-bottom/right-bottom; horizontal/vertical center, 1/8 center; Center circle with any angle; Field outside center circle with any angle. |
CASE EXAMPLE
VEP - depend on functional integrity of central vision at any level of the visual pathway including the eye, retina, the optic nerve, optic radiations, and occipital cortex;
ERG/FERG - mainly reflect function of rod/cone and connected bipolar cells, rod/cone system can be isolated through dark/light adaptation;
PERG - represent function of ganglion cells when photo-receptor & bipolar cells works fine;
EOG - is an electrophysiological test of function of the outer retina and retinal pigment epithelium (RPE).
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