Advances in microincision cataract surgery intraocular lenses

Alió, Jorge L.; Rodríguez‐Prats, José Luís; Galal, Ahmed

doi:10.1097/01.icu.0000192520.48411.fa

Cited by 114 publications

(56 citation statements)

References 4 publications

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“…Many studies have shown that contrast sensitivity measured under varying luminance conditions is a robust indicator of functional vision. 15 In this study, we found that aspheric IOL group had a lower total SA that was associated with better contrast sensitivity at 3 and 6 cpd under photopic and at 1.5, 3 and 6 cpd under mesopic conditions (Figures 1 and 2). Peak improvement was 0.47 log units (79.7%) and 0.54 log units (53.1%) occurred at 6 cpd under both mesopic and photopic conditions.…”

Section: Discussionmentioning

confidence: 59%

“…The log (base 10) of the obtained contrast sensitivity values was used for statistical analysis, and a difference level of 0.15 log units between tests was considered clinically significant. 8,15 Statistical analysis For statistical analysis, logarithm of minimum angle of resolution (logMAR) acuities and contrast sensitivity transformed into log values were used. All variables in each group were tested for normality (KolmogorovSmirnov one sample test) and homogeneity of variances (Levene test) for parametric test.…”

Section: Visual Quality Testmentioning

confidence: 99%

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Comparison of higher order aberrations in eyes with aspherical or spherical intraocular lenses

Ahn

Kim

et al. 2008

Eye

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Purpose To compare ocular, internal, corneal aberrations, and contrast sensitivity in patients implanted with aspheric or spherical intraocular lenses (IOLs). Methods Total, corneal, and internal aberrations were measured using ray-tracing technology in 23 eyes implanted with aspheric (Tecnis ZA9003) IOLs, and in 25 eyes implanted with spherical (AcrySof SA60AT) IOLs. Spherical aberration (SA), coma, trefoil, and RMS of higher order aberrations (HOAs) were analysed for 4.0 and 6.0 mm optical zones. Best-corrected visual acuities (BCVAs), contrast sensitivity under photopic and mesopic conditions, and modulation transfer function (MTF) were evaluated to compare visual performances. Results The mean internal SA was À0.06/ À0.35 lm in the aspheric IOL group and 0.04/ 0.17 lm in the spherical IOL group (at 4 mm/ 6 mm pupil). Total SA was near to zero in the aspheric IOL group, and was 0.11±0.034/ 0.48±0.13 lm in the spherical IOL group. The internal Z 3 À1 and total Z 3 À1 were more negative in the spherical IOL group. The internal Z 3 À3 was more negative in the aspheric IOL group. The two groups were similar in terms of other Zernike values and RMS of HOA. There were no differences in BCVA between groups. The aspheric IOL group showed better contrast sensitivity at 3-6 cpd in photopic and 1.5-6 cpd in mesopic conditions. The MTF curve was better for the aspheric IOL group at 5-10 cpd. Conclusions The aspheric IOL with a negative SA reduced total SA by compensating for positive corneal SA. These effects resulted in improved contrast sensitivity.

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Section: Discussionmentioning

confidence: 59%

Section: Visual Quality Testmentioning

confidence: 99%

Comparison of higher order aberrations in eyes with aspherical or spherical intraocular lenses

Ahn

Kim

et al. 2008

Eye

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“…Prospective studies involving other variables related to total aberrometry and biomechanical studies of the cornea are important to improve our ability to accurately predict the outcomes of CXL. Further studies involving other means of assessing visual function, such as contrast sensitivity (16) and Lopes B, Ramos I, Koller T, Seiler T, Ambrósio Jr R assessment of brain neuroplasticity, may help clarify how visual quality improves in these patients and how this affects their daily activities (17,18) . In the present study, patients with less advanced keratoconus (higher volume and corneal thickness) preoperatively were more likely to achieve CVA improvement one year after CXL.…”

Section: Discussionmentioning

confidence: 99%

Visual prognosis of crosslinking for kearatoconus based on preoperative corneal tomography

Bernardo¹,

Ramos²,

Koller³

et al. 2014

Revista Brasileira De Oftalmologia

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“…For a detailed visual examination, various functions are tested, such as cognitive perception and the central processing function. Studies have shown that the assessment of visual acuity tested by the typical Snellen chart using the Landolt rings (C optotypes) alone is insufficient for visual function testing, because it provides limited information about the central vision, and it is necessary to determine not only the visual acuity but also the contrast sensitivity (8). Contrast sensitivity is an important measurement of visual function in patients with AMD, and visual acuity together with contrast sensitivity might provide complementary (9) and valuable information about visual function (10)(11)(12).…”

Section: Introductionmentioning

confidence: 99%

A comparison of contrast sensitivity in early mild and early intermediate age-related macular degeneration after adjusting for age and visual acuity

Liutkevičienė¹,

Čiumbaraitė²,

Banevičius³

2016

AML

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Background. It has been suggested that contrast sensitivity can provide valuable information about visual function in addition to visual acuity assessment. Some patients retain relatively good visual acuity, yet complain of poor vision. In these patients, other tests of visual function such as contrast sensitivity should be evaluated.Methods. We examined patients with early mild stage age-related macular degeneration (group 1), and early intermediate stage age-related macular degeneration (group 2). Digital analysis methodology was used for retina drusen localisation and its diameter measurement. Functional acuity contrast sensitivity tests (FACT) were performed using a Ginsburg Box, VSCR-CST-6500.Results. The nighttime results without glare in group 2 were worse at 1.5, 3, 6 and 18 cycles per degree of the visual angle, the daytime results without glare were worse at 3 and 6 cycles per degree. The nighttime results with glare were worse at 1.5, 3, 6 and 18 cycles per degree, and the daytime results with glare were worse at 1.5 and 3 cycles per degree. Results after adjusting for age and visual acuity to 1.0 in the group 1 patients were better compared to the group 2 patients and the p value was 0.0005.Conclusions. The test results in patients with early intermediate age-related macular degeneration, in comparison to early mild age-related macular degeneration, showed a significant decrease mostly in the nighttime either with or without glare in high and medium spatial frequencies (cycles/degree). After adjusting for age and visual acuity the FACT results were even worse in early intermediate AMD patients.

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Advances in microincision cataract surgery intraocular lenses

Abstract: Recent advances provide the clinician with an awareness of why the new contrast-sensitivity standards are based on linear sine-wave gratings and how image-processing software can be used to better understand the quality of functional vision of the patient.

Cited by 114 publications

References 4 publications

Comparison of higher order aberrations in eyes with aspherical or spherical intraocular lenses

Comparison of higher order aberrations in eyes with aspherical or spherical intraocular lenses

Visual prognosis of crosslinking for kearatoconus based on preoperative corneal tomography

A comparison of contrast sensitivity in early mild and early intermediate age-related macular degeneration after adjusting for age and visual acuity

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