الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
In addition to removing the opacified crystalline lens, cataract surgery has developed from a simple precedure to one that tries to rectify all refractive problems. The major aim of intraocular lens (IOL) implantation in the past was to achieve emmetropia for distance vision. Furthermore, both cataract surgeons and patients want an intraocular lens implanted that will give quality vision for distant, intermediate, and near. Over time patients’ expectations for cataract surgery have grown, surgical equipment and lens technology has also continued to advance. Intermediate vision tasks, such as utilising tablets, phones, computers, and having hobbies, have become increasingly vital.
Conventional IOLs are monofocal lenses with asphericity technology that produce good results in far vision but are unable to improve intermediate and near vision. The Tecnis Eyhance (ICB00 IOL) is a novel monofocal IOL , that claims to offer better intermediate vision while retaining distance vision equivalent to a traditional monofocal IOL. This IOL has a similar aspheric platform like the Tecnis- ZCB00 1 single-piece, but it has a continuous shift in power from the periphery to the centre, providing a distinctive anterior surface that enables improved depth of focus.
Our study was a single prospective randomized interventional study which included 108 eyes of 54 patients who underwent uncomplicated phacoemulsification surgery. 60 eyes were implanted with the Eyhance IOL and 48 eyes implanted with the Tecnis IOL. The mean age for the Eyhance group was 54.6 ± 10.93 years while for the Tecnis group was 53.2±12.72 years. The mean corneal astigmatism was 0.52 ± 0.18diopters and 0.48 ± 0.24 diopters for the Eyhance and Tecnis group respectively. Mean axial length was 24.25 ± 1.27 mm and 24.0 ±1.82 mm for the Eyhance and Tecnis groups respectively. Mean IOL power used was 19.33 ± 5.10 diopters and 20.95 ± 3.54 diopters for the Eyhance and Tecnis groups respectively. There was no statistical significant difference between both groups regarding age, preoperative corneal astigmatism, axial length and IOL power.
One month postoperative patients were evaluated for uncorrected and best corrected distance (6 meters), intermediate (65 cm) and near (35 cm) visual acuities using ETDRS charts. Monocular defocus curves, and subjective quality of vision (using VFQ-25) were also assessed.
The postoperative spherical equivalent values for the Eyhance and Tecnis groups were -0.06 ± 0.32 diopters and -0.14 ± 0.27 diopters respectively; UCVA for far vision 0.17 ± 0.15 logMAR and 0.23 ± 0.13 log Mar; UCVA for intermediate vision 0.23 ± 0.05 logMAR and 0.4 ± 0.06 logMAR; UCVA for near vision 0.29 ± 0.33 LogMAR and 0.51 ± 0.37 logMAR; BCVA for far vision 0.17 ± 0.13 logMAR and 0.19 ± 0.13 logMAR; BCVA for intermediate vision 0.05 ±0.08 logMAR and 0.09 ± 0.08 logMAR; BCVA for near vision 0.19 ± 0.07 logMAR and 0.41 ±0.05 logMAR.In UCVA and BCVA for near and intermediate, the Eyhance group demonstrated statistical significance (p<0.05) when compared to the Tecnis group, whereas there was no statistical significant difference between the two groups in UCVA and BCVA for far.
As regards the defocus curve the Eyhance group had better logMAR visual acuities at vergence of -1, -1.25 and -1.5 diopters. The differences were statistically significant (p<0.05) for vergences of -1 to -1.5 diopters and not for vergence of -0.25,-0.75 and 0 diopters.
All patients in our study attained excellent scores in the VFQ-25 and no statistical significance difference was noted between both groups.
Lastly, there was a statistically significant correlation between patient satisfaction and more negative corneal spherical aberration in the eyhance group for near vision, r (-0.996), p<0.05).There was however no significant correlation between patient satisfaction and corneal spherical aberration in the tecnis group, r (-0.328), p>0.05