- Provides perhaps the most positive fixation for corneal relaxing incisions as well as phaco incisions
- Low profile design with no glare
- The original Thornton Ring was designed to fixate the globe while performing Radial and Astigmatic Keratotomy (RK and AK) (original design was fixed only and not a swivel handle)
- Dr. Howard Fine asked Mastel to remove a segment of the Thornton ring to allow phaco incisions, and the rest is history.
- Provides a pattern for performing non-guided LRI incisions in a simple manner
- Properly finished teeth may redden the conjunctiva but not lead to subconjunctival hematomas
- By retropulsing the globe while applying pressure to the sclera, IOP increases which improves incision depth
- Note: All modern globe fixation rings have their origins based upon designs by Spencer P. Thornton, MD.