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First Author: T.Manoilo UKRAINE
Co Author(s): G. Parkhomenko Z. Gurbic M. Beliy
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To evaluate clinical results of thin flap aspherical LASIK with static and dynamic cyclotorsional eyetracking for correction of ametropia with high astigmatism.
Noviy Zir ophthalmosurgical clinic, Ukraine, Kyiv
This retrospective study evaluated 6 month results of thin flap aspherical LASIK for myopic and mixed astigmatism in 112 eyes of 60 patients. The LASIK flaps were created with the Carriaso-Pendular microkeratome and the ablation with the Schwind Amaris® 500 excimer laser (SCHWIND eye-tech-solutions GmbH&Co. KG, Kleinosstheim, Germany). Cyclotorsional movements were evaluated for static cyclotorsion component (SCC) for mean and repeatability, and for dynamic cyclotorsion component (DCC) for mean and amplitude. Clinical outcomes were evaluated for predictability, refractive outcome and safety.
Mean preoperative spherical equivalent was -3.03 D ±3.01 D (+3.50 to -7.25 D) and mean preoperative refractive cylinder was - 2.32 D ±1.32 D (-2.00 to -5.50 D). Mean flap thickness was 101ḟ7 ṁm. Rates of registration were 92% for SCC and 97% for DCC. SCC data was within ±5 degrees in 62% of cases, SCC data was within ±8 degrees in 8% of cases. Repeatability of SCC was ±1,8 degree in 86% of cases. Mean DCC was within ±1 degree in 95% of cases. DCC amplitude was within ±2 degrees in 84% of cases. At 6-month follow-up best spectacle-corrected visual acuity improved in 58% of eyes, 82% of eyes were within ±0.50 diopter (D) of astigmatism. Mean defocus was -0.15 ±0.24 D and astigmatism was 0.37 ±0.22 D. Only 2 eyes (1,8%) were retreaded after 6 months due to residual astigmatism. No other complications were occurred during follow-up.
Thin flap aspherical LASIK with advanced cyclotorsion compensation using the Schwind Amaris® 500 excimer laser is safe and predictable and yields good astigmatism correction. Refraction and visual acuity remain stable during fillow-up