الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The advancement of new technologies in intraocular lens (IOL) design and surgical techniques has increased the expectations of patients for exceptional postoperative vision and complete spectacle independence after cataract surgery.
Toric IOLs provide better UDVA, greater spectacle independence, and lower amounts of postoperative residual astigmatism than nontoric IOLs, even when relaxing incisions are used.
Application of viscoelastic substances aims in cataract surgery to prevent loss of the corneal endothelium. This purpose is achieved through deepening of the anterior chamber, protection of the endothelial cells from surgical trauma mechanically and coating of IOL.
The study was carried out on 40 eyes of 26 patients of either sex. The eyes were randomly assigned to 1 of 2 groups according to the Viscoelastic material used in toric IOL implantation.
The first group included 20 eyes of 12 patients with Healon Viscoelastic material used during IOL implantation. The second group included 20 eyes of 14 patients with hydroimplantation of toric IOL.
VERION system (Alcon Laboratories, Ft. Worth) was used for Toric IOL power calculation and planning and intraoperative alignment of axis for both groups.
For the first group; viscoimplantation of toric IOL (Healon) was done
For the second group; hydroimplantation of toric IOL was done.
Follow-up visits were performed on first day, 1 week and 2weeks postoperative to record patients’ uncorrected distance visual acuity (UDVA), manifest refraction including residual refractive astigmatism, best corrected distance visual acuity (CDVA), post operative IOP and post operative ECD.
A 2 weeks post-operative astigmatism was - 0.01± 0.53 D (mean ±SD) in Healon group and BSS group - 0.24 ± 0.25 D(mean±SD). There was no statistically difference between post operative corneal astigmatism occurred in both groups during any visit. Time of toric IOL implantation in the Healon group was 255.15 s± 3.38 s (mean±SD) and in the BSS group was 95.37 ±4.28 s (mean±SD), there was a statistically significant difference in the time of toric IOL