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Guoqiang Li, Zengzhuo Li; Adaptive electro-optic occluder with variable transmission and contrast. Invest. Ophthalmol. Vis. Sci. 2018;59(9):4124.
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© ARVO (1962-2015); The Authors (2016-present)
It is well known that the neural signals from the amblyopic eye are supressed by the fellow eye. The current clinic treatment of amplyopia mostly uses eye pads to compleely block the fellow eye. A couple pilot studies used switchable liquid crystal device with binary (on and off) states. It would be more functionally powerful to use an adaptive electro-optic occluder with continuously tunable transmission to enhance binocular vision. Furthermore, it would be even more attractive if both transmission and contrast in each eye can be independently controlled for rebalancing the asymmetric binocular vision.
By using a new liquid crystal device as the eyewear and a resolution target as the object, we measured both the transmission and the contrast through the model eye with about 60-diopter power and a camera as a function of the applied electric field. The amplitude of the field is fixed to be 14.4Vrms, but the frequency is changing. The transmission and the contrast can be controlled independently to different values for each eye.
When the frequency of the electric field is changed from 40k Hz to 80k Hz, both the transmission and the contrast are continuously tuned from 0 to about 0.9.
The new liquid crystal eyewear can continuously change both the transmission and the contrast. It could be a promising alternative for treatment of amblyopia and it may have an impact in vision care.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
Adaptive electro-optic occluder with variable transmission and contrast.
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