Abstract
Purpose :
Determine visual acuity at three distances, residual refractive error, perform a defocus curve, determine contrast sensitivity, assess changes in quality of life parameters before and after surgery, degree of independence to the use of spectacles and general percentage of satisfaction.
Methods :
It is a prospective, observational, nonrandomized, interventional study conducted at Instituto de Oftalmología Fundación Conde de Valenciana I.A.P. We included 24 eyes (12 patients) with senile cataract, no other ocular pathologies and astigmatism less than 1 D. All data were analyzed by paired Student T test and Fisher's exact test (P value less than 0.05).
Results :
We included 7 women and 5 men with an average age of 70 years. The initial visual acuity was LogMAR 0.9212 ± 0.572 and at 6 months of the procedure we found an improvement in vision at the three distances to 0.0142 ± 0.01283 for distance, 0.0117 ± 0,01239 for intermediate and 0.0096 ± 0.01367 for near vision. Average residual refractive error was of + 0.16 sphere and -0.55 cylinder.
The defocusing curve showed continuous and satisfactory visual acuity at all distances, contrast sensitivity was reduced after surgery remaining stable throughout six months of follow-up.
All the subjects obtained an improvement at 10 of the 12 sub-scales in quality of life questionnaire, color sensitivity showed a tendency to obtain a statistically significant result, and eye symptoms sub-scale had no statistically significant result as expected.
Dysphotopsias occurred in 10 of 12 patients, 70% were halos. Only one had driving difficulty in the first two months, which improved after 6 months of follow up.
Regarding satisfaction, 92% reported full satisfaction to distant and intermediate vision and only 50% of them were satisfied with their near distance. 92% of them did not require lenses to see far or intermediate objects, 50% still used lenses for near vision in some situations, only one patient referred to constantly use them. However, 92% of them agree they would re-implant this lens if they needed to.
Conclusions :
Symfony is an adequate alternative for the treatment of patients with cataracts who desire independence to spectacles at distant and intermediate vision, with some capacity for near vision to, in the absence of discomfort due to positive dysphotopsia.
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.