In one aspect, a device includes a processor, at least one lens accessible to the processor, and a memory accessible to the processor. The memory bears instructions executable by the processor to receive synchronization information from another device, and based on the synchronization information, actuate the at least one lens to permit visible light to pass therethrough at times at which first frames of first content are presented and not at times that second frames different from the first frames for second content different from the first content are presented.