Newton Kara-Jose Junior

Comparison between OPD-Scan results and visual outcomes of monofocal and multifocal intraocular lenses

PURPOSE To compare the visual outcome, contrast sensitivity and wavefront analysis of patients that underwent cataract surgery and implantation of AcrySof SN60D3 multifocal intraocular lens with those who received the AcrySof SN60AT monofocal IOL. METHODS This was a prospective clinical trial of forty eyes that received the multifocal IOL and thirty-two eyes that received the monofocal IOL after phacoemulsification. RESULTS Values for total and spherical aberrations in the multifocal group were statistically lower than in the monofocal group. In the monofocal group, 75% achieved uncorrected intermediate visual acuities between Jaeger 1 and 6. In the multifocal group, 75% of the eyes achieved more than Jaeger 6. At least 87.5% of the multifocal group and 6.3% of the monofocal group achieved monocular uncorrected near acuity of 20/30 (J2, N5) or better. And 90.0% of the eyes in the multifocal group and 37.5% in the monofocal group achieved an uncorrected near acuity of 20/40 (J3, N6) or better. The mean spherical error was 0.11 D in the multifocal group and -0.18 D in the monofocal group (p=0.0379). The SN60D3 group compared to SN60AT group had low contrast sensitivity (log units) with statistically significant differences in 6.0 cpd in photopic conditions (p=0.014) and the SN60D3 group compared to SN60AT group had higher contrast sensitivity (log units) under mesopic conditions (p=0.044). CONCLUSION The multifocal IOLs induced less spherical aberration than monofocal IOLs and predictably good uncorrected distance and uncorrected near acuities. However, contrast sensitivity was lower in the multifocal group.

Estudo comparativo do desempenho visual e análise de frente de onda entre as lentes intra-oculares multifocais difrativas Tecnis® ZM900 e AcrySof® ResTor® SN60D3

PURPOSE: Comparison of the visual performance and wavefront analysis between patients with Tecnis® ZM900 aspheric and AcrySof ReStor® SN60D3 spheric diffractive multifocal intraocular lenses (IOL). METHODS: This prospective comparative study included 78 eyes of 39 patients. The performed ophthalmologic evaluation included near, intermediate and distance corrected and uncorrected visual acuity, contrast sensitivity measurement (under photopic and mesopic conditions) and wavefront analysis with the OPD-Scan aberrometrer. RESULTS: Uncorrected near and distance visual acuity and aberrometry analysis were similar with both intraocular lenses; nevertheless, intermediate visual acuity and contrast sensitivity under photopic conditions were statistically better with Tecnis ZM900. CONCLUSION: Both studied intraocular lenses promoted excellent near and distance postoperative visual acuity, in high contrast situations. Tecnis ZM900 IOL provided good quality of vision with high contrast condition in low luminosity with reduction in spherical aberration and improvements in intermediate visual acuity when compared to Restor IOL.

Comparison of central corneal edema and visual recovery between liquefaction and conventional phacoemulsification in soft cataracts

PURPOSE: The aim of the present study is to assess central corneal edema and visual recovery after cataract surgery performed according to two technologies: conventional ultrasonic and liquefaction (Aqualase®). METHODS:This is a prospective contralateral study in wich 20 patients with comparable preoperative conditions were submitted to cataract surgery were evaluated. Preoperative assessment involved complete ophthalmological examination and the study included patients with bilateral cataracts up to grade 2, according to the Lens Opacity Classification System II. The same cristaline fracture technique was used in all cases, and surgical procedures were performed by the same experienced surgeon, using two technologies: liquefaction or conventional phacoemulsification. Postoperative central corneal edema was measured by corneal optical pachymetry (Orbscan II®) on the 1st, 3rd, 7th and 10th postoperative days. RESULTS:None of the 20 patients submitted to surgery was lost during the postoperative follow-up or excluded from the analysis. On the first postoperative, the visual acuity average was 0.031 logMAR in the Aqualase® group and 0.043 logMAR in the conventional surgery group. No statistical difference was detected in the assessment of visual acuity throughout the postoperative period. Central corneal pachymetry varied from 543.93 + 34.69 preoperatively to 545.08 ± 25.67 on the last day of follow-up in the Aqualase® group, and from 543.13 + 30.62 to 536.08 + 34.89 in the conventional technique group, without statistical significance. CONCLUSION:This study suggests that both techniques are equally effective for surgery on lenses with grade I or II cataract, and that they provide similar results in terms of visual recovery and central corneal edema.

Facectomia na infância: quem são nossos pacientes?

OBJECTIVE: To analyze the profile of the patients who were submitted to phakectomy at the cataract service of the Hospital da Piedade, under the age of 10 years old, evaluating the main indications, the socioeconomic and gestational profiles in the relevant cases. METHODS: Data of 60 patients under the age of 10 years old submitted to lensectomy, were retrospectively analyzed, during the period between January of 2006 and December of 2007. All the surgeries were performed at the cataract service of the Hospital da Piedade, by the same surgeon. RESULTS: Of the 60 patients, 25 were female (42%) and 35 were male (58 %). 42 patients (70%) had the diagnostic of congenital cataract, 8 (13%) had subluxated lens and 10 (17%) had lensectomy for traumatic cataract. Considering congenital cataract patients mothers, 40 (95%) underwent prenatal exams with more than 5 appointments, 9 (22.5%) of them were infected by rubella virus during the pregnancy. In subluxation cases, 8 had Marfans syndrome. 10 cases of trauma occurred in boys. CONCLUSION: It was possible to verify that the majority of our patients submitted to phakectomy had congenital cataract and there is an important number of cases that still associated to rubella. Decreasing time since the suspect until the specialized consultation, will improve the visual prognosis of the children.

Lentes asféricas: avaliação da indicação clínica e das opções de lentes

With aspherical intraocular lens (IOL), phakectomy could be more than removal of cataract, it also could means an improvement in optical quality of the eye. In this article, recently published studies on aspherical IOLs and exams to access optical quality were reviewed.