There are some that let you hook up headphones as well. It's all about bilateral stimulation and some people get it better through touch as opposed to visually. From the APA:
"During EMDR therapy, clinical observations suggest that an accelerated learning process is stimulated by EMDR’s standardized procedures, which incorporate the use of eye movements and other forms of rhythmic left-right (bilateral) stimulation (e.g., tones or taps). While clients briefly focus on the trauma memory and simultaneously experience bilateral stimulation (BLS), the vividness and emotion of the memory are reduced."
There are some that let you hook up headphones as well. It's all about bilateral stimulation and some people get it better through touch as opposed to visually. From the APA:
"During EMDR therapy, clinical observations suggest that an accelerated learning process is stimulated by EMDR’s standardized procedures, which incorporate the use of eye movements and other forms of rhythmic left-right (bilateral) stimulation (e.g., tones or taps). While clients briefly focus on the trauma memory and simultaneously experience bilateral stimulation (BLS), the vividness and emotion of the memory are reduced."
https://www.apa.org/ptsd-guideline/treatments/eye-movement-r...