Table 2.

Summary of wearable EOG platforms.

Wearable Platforms	Electrodes			Platforms		Refs.
	Types	Materials	Counts	Size	Features
Earplug	Foam	Silver	2	2 × 2 × 1 mm3	-Stable and comfy during sleep	[44,45]
	Foam	Conductive cloth	2	2 × 2 × 1 mm2	-Stable and comfy during sleep	[43]
Eyeglass	Gel	Ag/AgCl	6	15 × 14 × 5 cm3	-Lots of wires were attached	[37]
	Metal	Silver	3	15 × 14 × 5 cm3	-Real-time delivery of feedback in the form of an auditory	[32,33,117]
	Metal	Ag/AgCl	5	15 × 14 × 7 cm3, 150 g	-Constant pressure for electrodes	[34,116]
	Foam	CNT/PDMS	5	15 × 14 × 5 cm3	-UV protection via sunglass lens	[5]
	Foam	Ni/Cu	5	14 × 12 × 7 cm3	-Absorbing the motion force via Foam and platform	[38]
Facemask	Fiber	Silver/Polyamide	3	14 × 7 × 2 cm3	-The wires are embedded in the eye mask platform	[40]
	Metal	Silver/Carbon	8	20 × 15 cm2	-Tattoo-based platform-Stable and comfy	[41]
	Fiber	Graphene	5	15 × 7 × 2 cm3	-High degree of flexibility and elasticity	[42]
Headband	Gel	Ag/AgCl	4	15 × 7 cm2	-Waveforms were well measured on the headband platform	[51]
	Metal	Ag/AgCl	4	15 × 7 cm2	-Reduction in the total cost by using disposable Ag/AgCl medical electrodes	[55]
	Fiber	Graphene	3	15 × 7 cm2	-Long-term EOG monitoring applications	[21,57,96]
	Fiber	Silver	5	15 × 7 cm2	-Reusable and easy-to-use electrodes are integrated into the cap.	[89]
	Fiber	silver-plated and nylon	3	15 × 7 cm2	-Long-term EOG monitoring applications	[58]