Dojutsus

Dojutsu are eye techniques. Press G to turn yours on or off. While it's on it drains chakra every second.

If the eyes don't sit right on your skin, fix them with /sreyes (see Fixing Your Eyes).

Awakening

An eye you own can be dormant: it shows in the Dojutsu menu, but turning it on says "Not awakened yet".

Eye	Awakening
Byakugan	Usable from the moment you get it
Ketsuryugan	Usable from the moment you get it
Sharingan	Born dormant. It wakes from a shock: survive a fight at 20% health or less, or see a party member die within 10 blocks of you (see Sharingan & Mangekyou)
Mangekyou Sharingan	The Mangekyou trial
Eternal Mangekyou	Evolves from the Mangekyou
Rinnegan	48h of Eternal Mangekyou use, then the Rinnegan trial's eyes and cell. It awakens straight away

How eyes level up

Every eye has 3 levels. After it awakens, it levels up from time spent active, not from time online. New jutsu unlock automatically at each level.

Eye	How you get it	Level 2	Level 3	Drain
Sharingan	Uchiha or Otsutsuki clan, DNA Lab	8h active	20h active	1/s
Byakugan	Hyuga or Otsutsuki clan, DNA Lab	6h active	16h active	1/s
Ketsuryugan	Chinoike clan, DNA Lab	6h active	16h active	1/s
Mangekyou Sharingan	The Mangekyou trial	12h active	48h active	2/s
Eternal Mangekyou	Evolves from the Mangekyou	-	-	3/s
Rinnegan	Sharingan → Mangekyou → Eternal Mangekyou → Rinnegan	8h active	20h active	2/s

The Uchiha road

Sharingan: awaken it in a near-death fight or when a comrade falls.
Mangekyou: the Mysterious Uchiha's trial, level 475+.
Eternal Mangekyou: Mangekyou level 3 and 72h of Mangekyou use in total.
Rinnegan: 48h of Eternal Mangekyou use, then the Rinnegan trial (level 850+): implant 2 Sharingan Eyes and a Hashirama Cell.

The Hyuga road

Byakugan: Hyuga or Otsutsuki clan, or DNA.
Tenseigan: 96h of Byakugan use, then the Tenseigan trial (level 700+): implant 2 Byakugan Eyes.

Off-clan eyes

An eye that isn't your clan's bloodline (for example from the DNA Lab) drains extra chakra.