Abstract FP15-10-REF
Refractive outcomes after surgical correction of astigmatism during phacoemulsification of cataract using the VERION system Print
Okuneva M., Tereshchenko A., Trifanenkova I., Vlasov M., Timofeev M.
Kaluga Branch of FGAU, NMIC, MNTK, Eye Microsurgery, Kaluga, Russian Federation
Purpose: To compare the results of manual limbal relaxing incisions (LRIs) with those of femtosecond laser arcuate keratotomies during the phacoemulsification of cataracts using the VERION system.
Methods: Phacoemulsification was performed in 46 patients with cataract and concomitant corneal astigmatism greater than 1.25 diopter. Patients of the group 1 (25 eyes) — conducted femtosecond laser arcuate keratotomy (Femto LDV Z8), group 2 (21 eyes) — manual LRIs. The calculated parameters in both groups: the mutual location of the main incision, paracentesis, arcuate cuts and IOL on the system VERION. The depth of the arcuate incisions was set at 80% or 90% of the initial thickness of the cornea, the diameter - 8.0 mm. To exclude cyclotorsion and localization errors in both groups, preoperative marking of arcuate incisions was applied using intraoperative navigation system VERION. One month after treatment, the uncorrected distance, spherical equivalent, corneal and refractive astigmatism were compared between groups. Correlation between targed-induced astigmatism (TIA) and surgically induced astigmatism (SIA) were also compared between the groups.
Results: The reduction of the initial astigmatism in all groups was statistically significant. The topographical location of the corneal arcuate incisions corresponded exactly to the planned one. Stabilization of keratometric parameters in all patients of groups 1 and 2 occurred within 3-6 months. Uncorrected visual acuity were in group 1 - 0,59 ± 0,14 and in group 2 - 0,49 ± 0,18, complete corneal astigmatism correction in group 1 was achieved in 73%, SIA to 0.75 ± 0.11 D and 42% SIA to 1.15 ± 0.25 D respectively. The correlation between TIA and SIA was greated in group1.
Conclusions: Topographically oriented and calculated on the VERION system femtolaser arcuate keratotomy allows to achieve a planned compensation of the initial corneal astigmatism and the maximum visual acuity.

Assigned speakers:
Marina Okuneva , Kaluga Branch of FGAU «NMIC «MNTK «Eye Microsurgery» named after acad. S.N. Fedorov» , Kaluga , Russian Federation

Assigned in sessions:
16.06.2019, 10:00-11:30, Free Papers/Rapid Fire, FP15, Oculoplastics, Refractive Surgery, Galliéni 1+2