New 355-Degree Intracorneal Ring and Simultaneous Intrastromal Crosslinking for Treatment of Nipple-Type Keratoconus
Narrative Responses:
Purpose
To evaluate the efficacy, safety, and predictability of new 355º intrastracorneal ring segment (ICRS) and simultaneus intrastromal cross-linking for correction of nipple type keratoconus.
Methods
This study comprised patients with nipple type keratoconus who had 355º ICRS implantation with femtosecond laser and simultaneus intrastromal cross-linking followed for 6 months. The uncorrected (UDVA) and corrected (CDVA) distance visual acuities, residual refractive errors, and complications were analyzed.
Results
The study enrolled 7 eyes (4 patients). Mean age was 28.96 years (19 to 39). 6 months after ICRS implantation and simultannues intrastromal cross-linking, mean UDVA (decimal) was 0.17 Snellen preoperatively, improved to 0.5 Snellen . The mean preop CDVA was 0.47 Snellen, improved to 0.65 Snellen. 100% of eyes were within 1.00 diopter (D) of the desired refraction. Mean preop SE -7.05 D (-4.00 D to -8.25 D), mean postop SE -0.59 D (-0.75 D to +1.00 D). No complications were found.
Conclusion
The new 355º intracorneal ring segment (ICRS) and simultaneus intrastromal cross-linking provided good visual acuty and refractive outcomes, the combination of both procedures are an adequate option for the correction of nipple type keratoconus.