LKC TECHNOLOGIES RETeval - Device Specifications and Safety

Regulatory and Safety Information
RET eval Device User Manual 86
Specifications
Light source
Red LED
(621 nm)
Green LED
(530 nm)
Blue LED
(470 nm)
White
(RGB)
Flash luminance
energies (cd∙s/m
2
)
0.0001 –
15
0.001 – 17
0.0001 – 5
0.002 –
30
Background
luminance (cd/m
2
)
0.03 –
3000
0.2 – 3500
0.03 –
1200
0.4 –
6000
To convert to Trolands, multiply luminance by the pupil area in mm
2
.
Input Type
Custom 3 pin connector with positive, negative, and right leg drive
signals.
Noise
< 0.1 µVrms at the flicker frequency for flicker protocols
CMRR
> 100 dB at 50-60 Hz
Frequency Range
DC-coupled
Flicker Frequency
Approximately 28.3 Hz
Data Resolution
Approximately 71 nV / bit
Input Range
± 0.6 V
Sampling rate
Approximately 2 kHz
Timing accuracy
†
(electronic eye)
< ±0.1 ms
Timing precision
†
(human eye, 1σ)
Typically < ±1 ms
Pupil measurements
1.3 mm – 9.0 mm, < 0.1 mm resolution
Safety
Battery-powered. Complies with optical, electrical, and
biocompatibility safety standards.
Power source
Li-Ion battery allows testing of approximately 70 patients before
recharging, depending on the protocol used
Recharge time
4 hours – charger included
Size
2.8” W x 3.8” D x 8.4” H (7 cm x 10 cm x 21 cm)
Weight
8.5 oz. (240 g)
Docking station
Convenient storage location, charging stand, and USB connectivity to
your computer and network
Protocols
Based on software options, choose from retinal illuminance (Td) and
luminance (cd/m
2
) versions of ISCEV standard protocols, flicker
protocols, and a diabetic retinopathy assessment protocol.
†
For Troland-based flicker protocols having a retinal illuminance energy ≥ 4 Td∙s.
All specifications are subject to change.
Contraindications
Use of the RET eval device is contraindicated under these conditions:
• Do not use with patients diagnosed with photosensitive epilepsy.