Artikel
Toric intraocular lenses in correction of high degree ametropia
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Autoren
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Marija Ivanova
- IRTC Eye Microsurgery Complex, Ekaterinburg, Russland
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Boris Laptev
- IRTC Eye Microsurgery Complex, Ekaterinburg, Russland
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Alexey Ulyianov
- IRTC Eye Microsurgery Complex, Ekaterinburg, Russland
| Veröffentlicht: | 13. Juni 2018 |
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Gliederung
Text
For today surgical correction of corneal astigmatism is widely used with IOL correcting spherical refraction usually from 6 diopters and astigmatism from 0.75 to 4.0 diopters (standard toric IOL), but there are patients with high degrees of ametropia, who do not fall within available standard toric IOL.
Purpose: To analyze the results of torbi 709 Zeiss toric IOL with extended sphere-cylindrical range implantation in patients with high degree of ametropia (astigmatism)
Material and methods: We have performed a retrospective study of 10 patients (15 eyes), there were 6 males and 4 females aged from 26 to 65 years (mean age 45 ±12.44). All patients were operated from January 2017 to February 2018. All the patients underwent standard examination. Calculation of spherocylindrical IOL power was performed by zcalc.meditec.zeiss.com online calculator. Preoperative marking of the horizontal level and intraoperative marking of the IOL implantation axis were performed. All the patients underwent standard phacoemulsification with Torbi 709 IOL implantation. Visual acuity (UCVA and BCVA), power of spherocylindrical correction according to viso-and refractometry were evaluated before, at the first day and one month after the operation.
Before surgery: UCVA ranged from 0.005 to 0.3 BCVA from 0.15 to 1.0. Spherical component was from -27.0 to +4.47, and cylinder was from -7.0 to +5.75. Keratometry ranged from 33.05 to 46.8 (mean 44.05 ±3.2).
Results: There were no intra- and post-operative complications.
At the 1st day after surgery, UCVA ranged from 0.1 to 0.7 (mean 0.35 ±0.17), BCVA was from 0.45 to 1.0 (0.8 ±0.16) Spherical component was from -3.0 to +0.5 (medium -1.5 ±1.2), astigmatism from -2.0 to +1.75 (medium -0.6 ±0.9.). Keratometry was from 46.75 to 30.86 (mean 43.5 ±3.8).
According to refractometry spherical component was from -3.0 to +0.5 (mean -1.4 ±1.4), cylinder was from -3.5 to -0.25 (mean -1.01 ±1.1).
One month after surgery UCVA was from 0.1 to 1.0 (mean 0.45 ±0.3), BCVA was from 0.5 to 1.0 (mean 0.85 ±0.15) Spherical component was from -0.25 to -3.5 (mean -2.0 ±1.0), astigmatism was from -1.0 to -0.5 (mean -0.65 ±0.2.).
Keratometry was from 32.2 to 42.8 (mean 43.8 ±3.9).
According to refractometry spherical component was from -3.5 to -0.25 (mean -1.8 ±1.05), cylinder was from -2.0 to -0.25 (mean -0.8 ±0.71.).
Conclusions: The analysis of implantation results showed high efficiency of TORBI 709 Zeiss toric IOL with extended spherocylindrical range in patients with high degree ametropia.
