Three year prospective, randomized evaluation of intraocular lens implantation through 3.2 and 5.5 mm incisions

Oshika, Tetsuro; Nagahara, Kunihiro; Yaguchi, Shigeo; Emi, Kazuyuki; Takenaka, Hisashi; Tsuboi, Shunji; Yoshitomi, Fumiaki; Nagamoto, Toshiyuki; Kurosaka, Daijiro

doi:10.1016/s0886-3350(98)80293-9

Cited by 54 publications

(26 citation statements)

References 17 publications

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“…Incisions made in the cornea generally cause a flattening in the incised corneal meridian (and a subsequent steepening of the orthogonal meridian), thus leading to 66,67 Therefore, the location of the corneal incision made during cataract surgery will influence the induced astigmatism, whereby a superior incision typically results in a flattening of the vertical meridian (and an increase in ATR astigmatism) and temporal incision placement leads to a flattening of the cornea in the horizontal meridian (that is, an increase in WTR astigmatism). 67,68 The size of the incision (with larger incisions causing greater astigmatic change) [69][70][71] and the location of the incision in relation to the corneal centre (with incisions closer to the centre of the cornea being associated with greater astigmatic change) 72 will influence the induced astigmatism. The changes in corneal astigmatism following cataract surgery appear to be related to the anatomical and biomechanical properties of the cornea.…”

Section: Astigmatism Resulting From Ocular Surgerymentioning

confidence: 99%

A review of astigmatism and its possible genesis

Read

Collins

Carney

2007

Clinical and Experimental Optometry

233

205

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Astigmatism is a refractive condition encountered commonly in clinical practice. This review presents an overview of research that has been carried out examining various aspects of this refractive error. We examine the components of astigmatism and the research into the prevalence and natural course of astigmatic refractive errors throughout life. The prevalence of astigmatism in various ethnic groups and diseases and syndromes is also discussed. We highlight the extensive investigations that have been conducted into the possible aetiology of astigmatism, however, no single model or theory of the development of astigmatism has been proven conclusively. Theories of the development of astigmatism based on genetics, extraocular muscle tension, visual feedback and eyelid pressure are considered. Observations and evidence from the literature supporting and contradicting these hypotheses are presented. Recent advances in technology such as wavefront sensors and videokeratoscopes have led to an increased understanding of ocular astigmatism and with continued improvements in technology, our knowledge of astigmatism and its genesis should continue to grow.

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Section: Astigmatism Resulting From Ocular Surgerymentioning

confidence: 99%

A review of astigmatism and its possible genesis

Read

Collins

Carney

2007

Clinical and Experimental Optometry

233

205

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“…Another feature is the long duration of the benefit of visual outcome. Posterior capsule opacification is the most common long-term complication after cataract surgery, with an estimated incidence of almost 11.4% [19][20][21][22][23][24], but usually visual losses due to PCO are not very severe. Even for cases of PCO, a one-time YAG capsulotomy can provide lifelong recovery of good vision.…”

Section: Discussionmentioning

confidence: 99%

“…The unilateral cataract and bilateral cataract surgery fees were ¥121,000 and ¥242,000, respectively. We assumed that the cost of treating posterior capsule opacification (PCO) by neodymium:yttrium-aluminium-garnet (Nd:YAG) capsulotomy needed to be taken into account postoperatively for 11.4% of the patients according to the results of a metaanalysis of 6 prospective studies performed in Japan [19][20][21][22][23][24]. The other medical costs included the initial consultation, preoperative visit, cost of hospital treatment (postoperative medications, anesthesia fees, inpatient facility fee, eye examinations), and postoperative management (3 postoperative visits) associated with cataract surgery.…”

Section: Cost-utility Analysismentioning

confidence: 99%

Cost-effectiveness of cataract surgery in Japan

Hiratsuka¹,

Yamada²,

Murakami³

et al. 2011

Jpn J Ophthalmol

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“…These small incisions do not usually need sutures, thus allowing faster patient recovery times, minimizing residual astigmatism and providing better visual outcomes. [1][2][3] The aim of this study is to assess the optical performance of a novel hydrophobic acrylic IOL recently launched into the market. This new lens is the EnVista (Bausch and Lomb, Rochester, NY, USA).…”

Section: Introductionmentioning

confidence: 99%

In vitro optical performance of a new aberration-free intraocular lens

Madrid-Costa

Ruiz-Alcocer

Ferrer-Blasco

et al. 2014

Eye

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Purpose To assess the optical performance of the new EnVista intraocular lens (IOL). Materials and methods Four aspheric IOLs were evaluated; the new EnVista is one amoung them. This IOL, similarly to the Z-Flex HB and the Bi-Flex 1.8 667AB ones, has a neutral aspheric design, whereas the fourth IOL under test (AcrySof IQ IOL SN60WF) presents a negative spherical aberration (SA). The IOL's aberration patterns were measured in vitro, by setting them up on an optical bench. From these aberration-pattern data, the modulation transfer function (MTF), the average modulation values, and the points spread function (PSF) were calculated. Furthermore, in order to assess the potential optical quality that these IOLs would yield once they are implanted, an average cornealaberration pattern was juxtaposed to the in-vitro profiles and the same parameters were calculated again. Results For the IOL-only scenario (ie, without including the corneal factor), it was the EnVista IOL, which is aberration-free that showed the higher MTF, PSF values. This was followed by the other two aberrationfree IOL models. However, when the effect of an average corneal pattern was also taken into consideration, the AcrySof IQ IOL SN60WF always outperformed the other neutral-asphericity IOLs. Conclusions The in-vitro optical performance of the EnVista IOL was good, but it decreases substantially in a whole-eye scenario, when the wavefront profile of an average cornea is added. Other designs with different degrees of SA should be considered for this IOL in order to surpass these results.

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Three year prospective, randomized evaluation of intraocular lens implantation through 3.2 and 5.5 mm incisions

Abstract: Smaller incision cataract surgery led to early recovery of visual function in the short term and less induced astigmatism in the long term.

Cited by 54 publications

References 17 publications

A review of astigmatism and its possible genesis

A review of astigmatism and its possible genesis

Cost-effectiveness of cataract surgery in Japan

In vitro optical performance of a new aberration-free intraocular lens

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