- LED Frenzel glasses
- For recognising a nystagmus (spontaneous and provoked nystagmus)
- Dioptre strength of at least +15 dioptres
- Firm lenses
- 3 LED light diodes for optimal illumination
- Nearly lifelong durability of light source
- Continuously regulable brightness
- Available in 2 models: type 823 with battery handle ; type 821-A with power cable
- Automatic on/off function
- Timer function optionally settable to 30, 60, 90 seconds
- Tempered lenses
- White housing
- Manufacturer: DeHag