Table 1.

Subdivision of the studies in relation to the site of stimulation and the treated pathology

Site of stimulation	Kind of stimulation	Clinical Conditions	First Author and year
Pre-chiasmatic	rtACS	Age-related macular	Gall et al,2010; Fedorov et al., 2011; Gall et al, 2011; Sabel et al., 2011; Schmidt et al., 2013; Bola et al., 2014; Gall et al., 2016; Shinoda et al., 2008; Anastassiou et al., 2013; Chaikin et al., 2015; Gil-Carrasco et al., 2018; Fujikado et al., 2006; Inomata et al., 2007; Oono et al., 2011; Schatz et al., 2011; Naycheva et al., 2013; Ozeki et al., 2013; Robles-Camarillo et al., 2013; Schatz et al., 2017; Bittner et al., 2018; Bittner et al., 2018; Ota et al., 2018
	tpES	degeneration
	tcES	Macular dystrophy
		Retinal artery occlusion
		Retinitis Pigmentosa
		Glaucoma
		Optic nerve damage
		Optic neuropathy
Post-chiasmatic	hf-tRNS	Visual field loss	Camilleri et al, 2014; Campana et al., 2014; Camilleri et al., 2016; Moret et al., 2018; Halko et al., 2011; Plow et al., 2011; Plow et al., 2012a; Plow et al., 2012b; Cowey et al., 2013; Olma et al., 2013; Spiegel et al., 2013; Spiegel et al., 2013; Ding et al., 2016; Kim et al., 2016; Alber et al., 2017; Matteo et al., 2017
	tDCS	Post-stroke visual perception degradation
		Amblyopia
		Myopia

Notes: rtACS: repetitive transorbital alternating current stimulation, tpES: transpalpebral electrical stimulation, tcES: transcorneal electrical stimulation, hf-tRNS: high-frequency random noise stimulation, tDCS: transcranial direct current stimulation.