Lenses for photosensitive epilepsy
Zeiss Clarlet Z1 (F133) blue lenses
- Blue tinted lenses (filter red light) have the most research support
- 610 patients in a large study had Z1 lenses abolish the EEG light response in 75% and reduced in additional 18% and unchanged in 6%
- Red is the most epileptogenic wavelength
- The darker the tint the more reduction of the EEG response possible but vision is also reduced especially in lower light environments making functioning more difficult with darker tints
Other blue lens tints
- B1+G1 or B1+G2 combinations have shown EEG improvement as well.
Other complementary strategies
- wearing regular sunglasses
- covering one eye
- sitting > 2 meters from screens
- reducing screen contrast