These multiple combined symbols specialises in healing any ailments with the Soul and your Client's relationship with the Universal OM. They were defined during the reign of Guru King Advaiyyan, but were refined during the time of the Twelve Gurus also.
These symbols have the power to holistically heal another person. All you have to do is visualise the Ud-Taulyan symbols/Loka and link it to the person by visualising them.
If you are in contact with the person you can perform the healing by tracing the symbols on the back of the person you are trying to heal with your index finger. If you or your client do not wish physical contact you can also trace just above the body. (The Ud-Taulyan symbols affect the soul – so can be placed anywhere, though generally most Aaiyyanist trace on the back).
Note: a more in-depth discussion on the healing Loka Yantras can be found in the official Hindu Aaiyyanist Healer's manual. This can be found here and is free to use. Do make sure you download it and use it to heal yourself and others.