Confiabilidade das medidas de espessura central da córnea com Orbscan II e paquímetro ultra-sônico

Netto, Adamo Lui; Malta, João Baptista Nigro Santiago; Barros, Maurício Arruda Câmara; Filho, Renato Giovedi; Alves, Mílton Ruiz

doi:10.1590/s0004-27492005000100012

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…6 Regardless of the absolute accuracy of Orbscan measures on a living human cornea, opinions have been given that 3 repeat scans should be done "to ensure repeatability and accuracy." 7 Indeed, a number of other investigators have opted to take 3 scans when using Orbscan, 8 -14 although others have reported using just 2 scans, 6,[15][16][17][18][19][20] or even taking 5 scans. 5,21,22 In all cases, repeat scans have been used to obtain an averaged value for further analyses.…”

mentioning

confidence: 99%

Repeatability of Central Corneal Thickness Measures by Orbscan Pachymetry for Right and Left Eyes

Jonuscheit

Doughty

2009

Eye &Amp; Contact Lens: Science &Amp; Clinical Practice

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The results confirm excellent repeatability of Orbscan pachymetry measures in both spectacle and contact lens wearers. For the adult subjects assessed, there was no evidence of a right/left eye difference and/or a progressive change in measured thickness with time. The high similarity between right and left eye measures should be taken into account if data from both eyes are being used either in contralateral eye comparisons or in comparative studies of different pachymeters.

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mentioning

confidence: 99%

Repeatability of Central Corneal Thickness Measures by Orbscan Pachymetry for Right and Left Eyes

Jonuscheit

Doughty

2009

Eye &Amp; Contact Lens: Science &Amp; Clinical Practice

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“…In order to reduce endothelial injury, the following alternatives have been developed: viscoelastic substances (12)(13)(14)(15) ; special surgical techniques such as, for example, nuclear prefracture; and new modalities of tip vibration at ultrasonic frequency, such as the White-star ® , Neosonix ® , dynamic rising time and torsional systems (1,2,5,6,(16)(17)(18)(19)(20)(21)(22)(23) . By the year 2000, an alternative technology was proposed for cataracts surgery (5,16,17) .…”

Section: Introductionmentioning

confidence: 99%

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

Nakano¹,

Hida²,

Kara‐José³

et al. 2009

Rev. bras.oftalmol.

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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 1 st , 3 rd , 7 th and 10 th 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.

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The Orbscan Acoustic (Correction) Factor for Central Corneal Thickness Measures of Normal Human Corneas

Doughty

Jonuscheit

2010

Eye &Amp; Contact Lens: Science &Amp; Clinical Practice

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Orbscan pachymetry can be expected to yield CCT data that is approximately 7% higher than U/S. The global application of a 0.92 AF does not robustly align the Orbscan CCT data to that of U/S and, in fact, can easily result in the data being as much as 7% lower. Overall, the level of agreement between Orbscan and U/S is limited, and Orbscan data should simply be reported as measured without any adjustment.

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Confiabilidade das medidas de espessura central da córnea com Orbscan II e paquímetro ultra-sônico

Abstract: Both methods are similar showing good correlation. In this study, the Orbscan II showed reliability, and this tool is extremely useful to evaluate subjects regarding refractive surgery.

Cited by 3 publications

References 17 publications

Repeatability of Central Corneal Thickness Measures by Orbscan Pachymetry for Right and Left Eyes

Repeatability of Central Corneal Thickness Measures by Orbscan Pachymetry for Right and Left Eyes

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

The Orbscan Acoustic (Correction) Factor for Central Corneal Thickness Measures of Normal Human Corneas

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