Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
Steinwender, G.
Optical quality after implantation of spherical or aspheric intraocular lenses in hyperopic and emmetropic patients
Doktoratsstudium der Medizinischen Wissenschaft; Humanmedizin; [ Dissertation ] ; 2018. pp.
[OPEN ACCESS]
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- Autor*innen der Med Uni Graz:
- Betreuer*innen:
- Ardjomand Navid
- Wedrich Andreas
- Altmetrics:
- Abstract:
- Purpose: To evaluate, whether hyperopic patients with short axial length and high dioptric intraocular lens (IOL) power may achieve a higher depth of focus after implantation of a monofocal spherical or aspheric IOL than emmetropic patients. Methods: In this randomized clinical trial patients presenting for cataract surgery were divided by calculated IOL power into a hyperopic (≥ 22.0 D) or emmetropic (18.0 to 21.5 D) subgroup, and received either an aspheric (Tecnis ZA9003, Abbott Medical Optics) or a spherical IOL (Sensar AR40e, Abbott Medical Optics). Postoperative measurements included corrected and uncorrected distance visual acuity (CDVA, UDVA), distance-corrected intermediate and near visual acuity (DCIVA, DCNVA), root-mean-square (RMS) values of corneal and total eye higher-order aberrations (HOA) and spherical aberrations (SA), and photopic and mesopic contrast sensitivity. Results: Sixty-two eyes of 62 patients were enrolled in this study; 34 eyes in the aspheric IOL group (15 hyperopic and 19 emmetropic eyes) and 28 eyes in the spherical IOL group (14 hyperopic and 14 emmetropic eyes). UDVA, CDVA, and contrast sensitivity did not differ significantly among the aspheric and spherical IOL group, whereas DCIVA and DCNVA were significantly better in the spherical IOL group (P = 0.004, P= 0.001, respectively). No significant differences were found between hyperopic and emmetropic patients in DCIVA and DCNVA with both, aspheric or spherical IOLs. Conclusions: Implantation of a monofocal spherical IOL resulted in an increased depth of focus without significant degradation of distance visual acuity or contrast sensitivity. There were no differences in depth of focus between hyperopic and emmetropic eyes.