True Seeing

Level & School
6th-level divination
Casting Time
Action
Range
Touch
Components
V, S, M (mushroom powder worth 25+ GP, which the spell consumees)
Duration
1 hour
Classes
Bard, Cleric, Sorcerer, Warlock, Wizard

For the duration, the willing creature you touch has Truesight with a range of 120 feet.

Level & School
6th-level divination
Casting Time
Action
Range
Touch
Components
V, S, M (an ointment for the eyes that costs 25 gp; is made from mushroom powder, saffron, and fat; and is consumed by the spell)
Duration
1 hour
Classes
Bard, Cleric, Sorcerer, Warlock, Wizard

This spell gives the willing creature you touch the ability to see things as they actually are. For the duration, the creature has truesight, notices secret doors hidden by magic, and can see into the Ethereal Plane, all out to a range of 120 feet.

True Seeing 5.5e 2024 vs. 5e 2014 edition differences

The 2024 version simplifies the effect, stating the creature has Truesight with a 120-foot range, whereas the 2014 version explicitly grants the ability to see things as they are, notice secret doors by magic, and see into the Ethereal Plane. The 2024 version omits these specific details.