ers . ▁They ▁compr ise ▁a ▁s tere os cop ic ▁head - mount ed ▁display ▁( prov iding ▁separate ▁images ▁for ▁each ▁eye ), ▁s tere o ▁sound , ▁and ▁head ▁motion ▁tracking ▁sens ors ▁( which ▁may ▁include ▁gy ro scop es , ▁acceler om eters , ▁magnet om eters , ▁struct ured ▁light ▁systems ▁etc .). ▁Some ▁V R ▁head sets ▁also ▁have ▁eye ▁tracking ▁sens ors ▁and ▁g aming ▁controllers . ▁ ▁History ▁ ▁The ▁S ega ▁V R , ▁announced ▁in ▁ 1 9 9 1 ▁and ▁seen ▁in ▁early ▁ 1 9 9 3 ▁at ▁the ▁Winter ▁C ES , ▁was ▁never ▁released ▁for ▁cons oles , ▁but ▁was ▁util ized ▁for ▁the ▁S ega ▁V R - 1 ▁motion ▁sim ulator ▁ar cade ▁att raction ▁in ▁ 1 9 9 4 . ▁Another ▁early ▁V R ▁head set , ▁the ▁For te ▁V FX 1 , ▁was ▁announced ▁at ▁C ES ▁in ▁ 1 9 9 4 . ▁The ▁V FX - 1 ▁has ▁s tere os cop ic ▁displays , ▁ 3 - axis ▁head - track ing , ▁and ▁s tere o ▁head ph ones . ▁Sony , ▁another ▁pione er , ▁released ▁the ▁Glas str on ▁in ▁ 1 9 9 7 , ▁which ▁has ▁an ▁optional ▁position al ▁sensor , ▁allowing ▁the ▁wear er ▁to ▁view ▁the ▁surr ound ings , ▁with ▁the ▁perspective ▁moving ▁as ▁his ▁head ▁moves , ▁giving ▁a ▁deep ▁sense ▁of ▁imm ersion . ▁These ▁V R ▁head