A Monk doesn't choose the Way of the Four Senses like one does with other Monastic Tradition, A Monk that has been blinded must still be deemed worthy of such a path by the Eyeless one, the Blind Overlord Tyr.
A Monk who loses his Sight in battle or for a great cause will often be accepted by the Eyeless one though it is not absolute. A Monk who takes his own Sight will almost never be accepted by Tyr all though it is not unheard of for one or two Great Monks to still have been accepted after taking their own sight.

Until 3rd level you are permanently effected by the Condition Blinded.

Blindsight:
Level 3-7 - 10 Feet
Level 8-11 - 20 Feet
Level 12-16 - 30 Feet
Level 17-20 - 40 Feet

From level 3 you gain advantage in all insight checks to do with Touch, Smell, Taste and Sound.

After years of growing accustomed to having lost your sight you others senses grow even stronger, At level 12 you gain the following:

Smell: As your senses grow sharper you begin to notice that not only do different creatures have different smells but individual people have their own unique scent. Now you can identify familiar people by their unique smell. If they are a "close friend" you can smell them from 100ft. (Someone is considered a close friend when you have travelled with them for a week or longer.) If it is a creature you have engaged with on multiple occasions beforehand (at least 3) or a prolonged period of time. You can now identify their scent from 80ft. You also become immune to surprise attacks from said creatures within 80ft.

Touch: If you can manage to lay your hand on a Creature you can manipulate the ki inside of them and if they fail a Wisdom saving throw of 10+ your Wisdom modifier they gain the condition Restrained. 

Sound:  If you are within 20ft of a person you can hear their heartbeat and breathing. (This helps with determining if someone may be lying to you.)

Taste: You might detect poison in a drink. You can learn the ingredients in anything you taste. (this could help you find out if something has put something in your food or drink.)

Way of the Four Senses

Blindsight:
Level 3-7 - 10 Feet
Level 8-11 - 20 Feet
Level 12-16 - 30 Feet
Level 17-20 - 40 Feet

You gain advantage in all insight checks to do with Touch, Smell, Taste and Sound.
You also have Disadvantage in all checks to do with Sight.

Tremorsense

Tremorsense is an innate ability of creatures that allows them to sense vibrations within a specified radius. Using this form of vibrolocation, they can pinpoint exactly where the vibrations originated from. This can be used to identify the location of unseen creatures.

You can not sense incorporeal, flying, floating or gliding creatures.

Tremorsense has a range of 40 feet.

Wholeness of Mind

At 11th level, you gain the ability to heal yourself. As your only bonus action, you can regain hit points by rolling 3D6 + your Con modifier. You get +1 D6 at Levels 13,16,19. You must finish a Short rest before you can use this feature again.

Enlightenment

At 17th level you understand the full potential of your enhanced abilities. You get the following benefits:

-10 feet truesight

-Proficiency in Perception and Insight. If you already have proficiency in one of the skills your bonus is doubled instead. Also you have advantage on perception and insight checks.

-You can touch a creature and spend 1 ki point to let your ki rest in that creature. Within 100 feet you know the exact location of the creature. Beyond the 100 feet you only can tell in   which direction the creature is. Your ki lasts for 1 week in the creature and if you use this on more then one creature you can't tell them apart.

-On a successful unarmed strike you can spend up to 5 ki to your your ki rest in the target for 1 minute. With a bonus action you can force the creature to do a constitution saving throw   against a DC of 8+ your proficiency bonus + your wisdom modifier. On a failed save you can use the ki in the target to cause a condition on the creature as shown below.
 1 ki - Deafened. 2 ki - Blinded. 3 ki - Stunned. 4 ki - +2 Exhaustion. 5 ki - Paralyzed.