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Static cyclotorsion measurements using the Schwind Amaris laser.
Arquivos Brasileiros De Oftalmologia
|October 9, 2014
Summary
Static cyclotorsion correction (SCC) is a useful tool for LASIK/PRK patients, reducing postoperative astigmatism variability. While not always feasible, SCC measurements improve refractive outcomes by minimizing astigmatic error.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Surgery
Background:
- Astigmatism remains a challenge in refractive surgery.
- Accurate cyclotorsion measurement is crucial for optimal outcomes.
- Static cyclotorsion correction (SCC) offers a potential solution.
Purpose of the Study:
- To evaluate the reliability and reproducibility of static cyclotorsion correction (SCC) measurements using the Schwind Amaris Excimer laser.
- To compare refractive outcomes of astigmatism treatment with and without SCC during LASIK and PRK.
Main Methods:
- Eighty eyes from 40 patients undergoing LASIK or PRK were included.
- Multiple sets of SCC measurements were taken pre- and post-operatively.
- Vector analysis was used to compare pre- and 3-month post-operative astigmatism.
Main Results:
- SCC measurements were feasible but had variable "no catch" rates.
- Significant cyclotorsion (≥2°) was observed in over 40% of eyes pre- and post-flap.
- While residual astigmatism showed no statistical difference, eyes with SCC had significantly less postoperative astigmatism (p<0.01).
Conclusions:
- Static cyclotorsion correction (SCC) is a simple and valuable tool in refractive surgery.
- SCC use leads to reduced variability in postoperative astigmatism.
- Further optimization of SCC measurement feasibility is warranted.
