The TTL25 is designed for users who want to wear loupes for the first time or who want a wider field of vision.
The diameter of the loupe bore is larger than a typical loupe, so there is less external interference, allowing the user to wear the loupe comfortably for longer periods of time with much less stress on the eyes compared to loupes with a smaller bore.
The TTL27/TTL32 are ultra-lightweight loupes that are comfortable to use.
The small lens size allows for a large field of vision over the cervical canal, making it easy to check instruments and monitor patient response during procedures.