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Contralateral comparison of visual outcome of AcrySof IQ and SA60AT intraocular lenses

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      Abstract

      Objective: To compare the visual performance of aspherical AcrySof IQ (SN60WF) and SA60AT spherical intraocular lenses after cataract surgery. Design: Prospective comparative study.
      Participants: Seventy eyes of 35 patients who underwent phacoemulsification for cataract surgery.
      Methods: The IQ lens was implanted in one eye and the SA60AT lens in the other eye of every patient. Refraction, uncorrected visual acuity (UCVA), and best spectacle-corrected visual acuity (BSCVA) were measured 1 and 3 months after surgery. At 3 months’ follow-up, the quality of vision, in terms of contrast sensitivity (CS) with and without glare and higher-order aberrations (HOA), was also determined.
      Results: At 3 months postoperative, the mean UCVA in the IQ and SA60AT groups was 0.25 (SD 0.26) and 0.30 (SD 0.27), respectively, and BSCVA was 0.10 (SD 0.16) in both groups. Spherical refractive error was -0.56 (SD 1.03) D and -0.47 (SD 0.64) D in the IQ and SA groups, respectively. In photopic conditions without glare, IQ eyes had statistically significant better CS at 12 cycles per degree (cpd) and better function at 3 and 18 cpd, and in mesopic conditions without glare, IQ eyes also had better results at 3, 12, and 18 cpd. In mesopic conditions with glare, IQ eyes also had better CS in 6 and 18 cpd. In terms of aberrations, the IQ group had significantly (p < 0.05) lower spherical aberrations, root mean-square, and coma X and Y values with 6 mm pupil size than the SA group.
      Conclusions: In terms of refraction, no significant difference was found between these 2 types, but there was a difference in the quality of vision in photopic and mesopic conditions and also HOA. Those with reactive and dilated pupils, such as younger patients and night drivers, may be more satisfied with IQ aspherical lenses.

      Résumé

      Objet: Comparaison entre la performance visuelle des lentilles intraoculaires asphériques AcrySof IQ (SN60WF) et
      celle des lentilles sphériques SA60AT après la chirurgie de la cataracte.
      Nature: Etude prospective comparative.
      Participants: Soixante-dix yeux de 35 patients qui ont subi une phacoémulsification pour la chirurgie de la cataracte.
      Methodes: La lentille IQ a été implantée dans un œil et la SA60AT dans l’autre œil de chaque patient. La réfraction, l’AVNC (acuité visuelle non corrigée) et la MAVC (meilleure acuité visuelle corrigée) ont été mesurées 1 et 3 mois après la chirurgie. Après 3 mois de suivi, la qualité de la vision, en termes de sensibilité au contraste (SC) avec et sans éblouissement, et d’aberrations d’ordre supérieur ont aussi été déterminées.
      Résultats: Trois mois apres l’opération, la moyenne d’AVNC de la QI et celle de la SA60AT étaient de 0,25 (ÉT 0,26) et 0,30 (ÉT 0,27), respectivement, et celle de la MAVC était de 0,10 (ÉT 0,16) dans les deux groupes. L’ES (erreur réfractive sphérique) était −0,56D (ÉT 1,03) et −0,47D (ÉT 0,64) des les groupes QI et SA respectivement. Dans les conditions photopiques sans éblouissement, les yeux QI avaient une SC (sensibilité au contraste) statistiquement significative supérieure à 12 cycles par degré (CPD) et fonctionnaient mieux à 3 et 18 CPD et, dans des conditions mésopiques sans éblouissement, IQ avait aussi de meilleurs résultats à 3, 12, et 18 CPD. Dans des conditions mésopiques avec éblouissement, les yeux QI avaient aussi une meilleure SC dans 6 et 18 CPD. Quant aux aberrations, le groupe QI avait significativement moins d’aberrations spheriques (p < 0,05), de RMS, de coma X et de valeurs Y avec des pupilles de 6 mm en relation au groupe SA.
      Conclusions: En termes de réfraction, il n’y avait pas de difference importante entre les deux types, mais il y a une différence de qualité de la vision dans les conditions photopiques et mésopiques et aussi aberrations d’ordre superieur. Somme toute, ceux qui avaient une pupille dilatée et réactive, comme les jeunes conducteurs et ceux de nuit, peuvent avoir plus de satisfaction avec les lentilles IQ asphériques.

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