Tregear Eye (トレギアアイ Toregia Ai) is a transformation device used by Ultraman Tregear's human form, Kirisaki. Its design when opened is based on the mask he wears, while its closed form resembles the restraint on Tregear's chest.
Kirisaki presses the button at the top of the device to open it up, changing its design from Tregear's chest to his mask. He then places the device adjacent to his face and transforms into Tregear.
|Showa Items||Beta Capsule | Ultra Eye | Willpower | Ultra Rings | Ultra Badge | Leo Ring | Beam Flasher | Bright Stick | Bright Bracelet|
|Heisei Items||Delta Plasma | Willpower | Beta Capsule/Flash Prism | Estrellar | Pikari Brush | Sparklence | Lieflasher | Esplender | Agulater | Nice Dreamer | Cosmo Pluck | Just Lancer | Evoltruster | Darkevolver | Max Spark | Mebius Brace | Knight Brace | Ultra Zero Eye | Saga Brace | Ginga Spark | Dark Spark | Dark Dummy Spark | Gunpad | Ginga Light Spark | Livepad | Victory Lancer | Chibull Spark | Ultra Fusion Brace | X Devizer | Orb Ring | Orb Calibur | Riser | Ultra Zero Eye NEO | Giga Finalizer | Gyro | Orb Ring NEO|
|Reiwa Items||Taiga Spark | Tregear Eye | Taiga Tri Blade | New Generation Eye | Z Riser | GUTS Sparklence|
|Other Media Items||Zoffy Bracelet | Jack Bracelet | Gorian Belt | Zaji Sword | Drew Bracelet | Flare Coin | Alphone Pendant | Ars Ring | Mimicry System | Ultra Operation|