Effect of intraocular lens implantation on visual acuity, contrast sensitivity, and depth of focus

Abstract

There was a higher amount of spherical aberration in the IOL group, related to a larger depth of focus, without loss of contrast sensitivity at optimum focus or loss of visual acuity. This might contribute to better quality of vision in pseudophakic subjects than in presbyopic phakic subjects.

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

“…Ao se submeterem à facectomia, os pacientes têm expectativas de melhora da sua visão, com conseqüente (9) . Pensando em satisfazer essas expectativas com uma boa visão funcional, várias inovações nas lentes intra-oculares foram desenvolvidas e os cirurgiões de catarata dispõem de inúmeras opções para escolher (10) . Com a facoemulsificação e o implante de LIO realizados por meio de incisões cada vez menores, possibilitou-se rápida recuperação visual com índices baixos de complicações nas mãos de cirurgiões experientes, além de boa qualidade da visão no período pós-operatório.…”

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

“…With the rapid advances in microsurgical technology, most patients contemplating cataract surgery have ever-higher expectations for the visual outcome following phacoemulsification and IOL placement (8) . Aspheric, multifocal, and accommodative IOLs are all excellent options that may provide improved quality of vision for these patients who may engage in a wide range of daily visual tasks (9) . The development of new devices such as the HartmannShack aberrometer and the Optical Path Difference Scan (OPDScan) provide new opportunities to study the quality of vision associated with various types of IOLs.…”

Comparison between OPD-scan results and contrast sensitivity of three intraocular lenses: spheric AcrySof SN60AT, aspheric AcrySof SN60WF and multifocal AcrySof Restor lens

“…The integration of wavefront technology and lens-based surgery represents a step toward improving functional vision and the quality of life for cataract patients (2)(3)(4)(5)(6). As we have learned that the optical wavefront of the cornea remains stable throughout life, the lens has started to come into its own as a primary locus for refractive surgery (7) .…”

“…As the pupil constricts, the focal dominance of the lens shifts from almost purely distance to equal-parts' distance and near. This approach conserves efficiency for mesopic activities when the pupil is larger, such as night driving, but reduces near vision under mesopic conditions (6) . Contrast sensitivity testing has confirmed a decline in visual performance with age (6)(7)(8)(9)(10) .…”

“…This approach conserves efficiency for mesopic activities when the pupil is larger, such as night driving, but reduces near vision under mesopic conditions (6) . Contrast sensitivity testing has confirmed a decline in visual performance with age (6)(7)(8)(9)(10) . Improvements in ocular biometry and cataract surgery have minimized refractive error, promoting quick visual recovery, with low intraoperative complications, good postoperative quality of functional vision, more accurately described on the basis of the ability to precisely discern details of images regardless of lighting and brightness conditions (7,11) .…”