جستجوی مقالات مرتبط با کلیدواژه « منحنی دفوکوس » در نشریات گروه « پزشکی »

To compare the results of implanting ReSTOR lenses, LISAtri 839, PanOptix, Physiol, and Symfony.

In this prospective study, 150 patients underwent phacoemulsification cataract surgery. Patients underwent sequential bilateral cataract surgery without complication and implantation of the above lenses (30 patients and 60 eyes) in each group of intraocular lenses. The following parameters were examined in each group: uncorrected and corrected vision (log MAR), the near, intermediate, and distant visual acuities, contrast sensitivity, and defocus curve in mesopic and photopic conditions and questionnaire form (related to patient satisfaction and dependence on glasses after surgery).

The near, intermediate, and distant visual acuities were examined in 5 groups 1 month, 6 months, and 2 years after lens implantation. Significant differences were observed in visual acuities in 5 groups 1 month after surgery, and these changes remained constant until the follow-ups of 2 years later (P<0.001). There was also a significant difference in the intermediate vision correction in the Symfony group compared to the other 4 groups (P<0.001). Contrast measurement results were better for Symfony with CSV-1000 at low SEF (1.5 and 3 CPD) under photopic conditions (P <0.003). In the mesopic conditions, the Symfony group presented better contrast at 12 CPD (P= 0.027). The defocus curve analysis revealed significant between-group differences for bifocal and other four groups at vergences of -1, -1.5 D (P<0.001). In the other defocus, no significant difference was seen and indicated that there was no significant difference in the provision of near and distant vision of bifocals and trifocals. Between the defocus curve of -2 to -3 diopters (distances of 40 cm and less), PanOptix, Physiol, and LISAtri performed better visual performance than Symfony (P=0.001), respectively; but no significant difference was observed between the other groups. There was no statistically significant difference between the groups in the amount of HILO and glare (the amount of light scattering or seeing false light rays around light sources). Overall, all patients recommended this surgery to their relatives and friends.

Multifocal diffractive lenses presented satisfactory and efficient results in 5 groups. Differences in results between current study groups and a comprehensive review of studies lead us to plan for each patient according to his/her needs to improve the quality of life.