Straylight before and after phacoemulsification in eyes with preoperative corrected distance visual acuity better than 0.1 logMAR

Lapid-Gortzak, Ruth; Meulen, Ivanka J.E. van der; Linden, Jan Willem van der; Mourits, Maarten P.; Berg, Thomas

doi:10.1016/j.jcrs.2013.10.030

Cited by 13 publications

(11 citation statements)

References 25 publications

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“…The raw data supplied by the original authors or the plots analysis was used to determine the 95% confidence interval (CI). 4,11,[21][22][23][24][25][26]28,30,31 To study the consistency of the new pseudophakic reference curve, it was compared to each of the 16 collected articles. The cross-validation technique was applied to avoid the influence of a particular result.…”

Section: Discussionmentioning

confidence: 99%

“…For this purpose, raw data were received from the authors of 3 different papers. 21,22,25 Analysis of the complete datasets from these studies led to the development of a computational model of straylight improvement after crystalline lens replacement. Improvement was defined as preoperative log(s) minus postoperative log(s), after which the relationship between preoperative straylight and its improvement was studied.…”

Section: Comprehensive Reviewmentioning

confidence: 99%

“…Cataract surgery has proved to be effective in reducing straylight even in cases of "clear lenses." 21 However, van der Meulen et al 22 recently found that almost 15% of healthy cataract patients after uneventful lens replacement had no change or an increase in straylight when decision-making involved only visual acuity. This can result in postoperative dissatisfaction even though visual acuity is good.…”

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confidence: 99%

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Ocular straylight in the normal pseudophakic eye

Łabuz¹,

Reus²,

Berg³

2015

Journal of Cataract and Refractive Surgery

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PURPOSE:To assess normal values for straylight in the pseudophakic eye as a function of age and to develop a model to predict the improvement in straylight after lens extraction based on preoperative straylight levels.SETTING: Rotterdam Ophthalmic Institute, Rotterdam, the Netherlands. DESIGN:Review with retrospective cross-study analysis.METHODS: A literature review was performed to identify relevant papers on straylight and pseudophakia with no patient comorbidities. Sixteen papers met the eligibility criteria and were included in the analysis. The postoperative results were used to define the norm for straylight in pseudophakia. Straylight improvement after lens replacement was assessed by evaluation of preoperative and postoperative values. The age effect was incorporated to determine a model for straylight improvement. RESULTS:The mean postoperative straylight value derived from 16 studies (1869 eyes) was 1.21 log units G 0.21 (SD). Age dependence could be assessed from 13 studies (1533 eyes), resulting in the straylight age-norm curve in pseudophakic eyes as follows: Straylight value Z 0.0044 Â age C 0.89 with G 0.42 log units of 95% confidence interval. A strong correlation was observed between preoperative straylight and its improvement after lens extraction, yielding the following relationship: Straylight improvement Z 1.04 Â preoperative straylight value À 0.006 Â age À 0.84. CONCLUSION:A norm for straylight in the pseudophakic eye was developed that is considerably different from the previously published norm for the phakic eye. The new pseudophakic norm can be used clinically to predict the straylight value after lens replacement and as a reference criterion for clinical studies.

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Section: Discussionmentioning

confidence: 99%

Section: Comprehensive Reviewmentioning

confidence: 99%

mentioning

confidence: 99%

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Ocular straylight in the normal pseudophakic eye

Łabuz¹,

Reus²,

Berg³

2015

Journal of Cataract and Refractive Surgery

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“…Since normal values for the young eye are around log(s) = 0.9, this corresponds to log(s) = 1.5. If this is compared to a value of log(s) = 1.4 for early cataract surgery (Lapid-Gortzak et al, 2014;van den Berg et al, 2013;van der Meulen et al, 2012), it follows that patients are already eligible for cataract surgery before the limit for safe driving is reached. This should be recognized.…”

Section: Discussionmentioning

confidence: 99%

Measurement of straylight for glare assessment and driving.

Berg

2017

Scand J Optom Vis Sci

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This review presents an overview of straylight as a quantification for glare sensitivity, to be used as a criterion for driver licensing. Glare disturbance is an important safety issue while driving. It is a known fact that glare issues in the early stages of cataract development are one reason why people give up driving at night. Glare is caused by the physical process of light scattering in the eye, causing a veil of straylight seen over the road. This veil lessens visibility, potentially to the point of complete blindness. By international agreement, glare must be quantified by measuring straylight, based on the "equivalent luminance" concept. Normal standards have been defined, including the dependence of straylight on age and cataract. Straylight can be measured accurately with the psychophysical 2AFC "compensation comparison" method, including a reliability check. An instrument for straylight measurement, the C-Quant is now commercially available. Straylight is a basic aspect of the eye, on which also other aspects of quality of vision, such as face recognition, contrast sensitivity, etc. depend. Straylight presence is used in ophthalmology as an early indication for cataract surgery. It is to a large degree independent of acuity. This review discusses the practical aspects of straylight measurement and limit values for occupational testing. Normal values for young subjects are around log(s) = 0.9. For demanding professions, a limit elevation of 2× (0.3 log, corresponding to 3 standard deviations) is proposed. For normal driving a limit elevation of 4× is proposed, corresponding to log(s) = 1.5. Cataract surgery is indicated at log(s) = 1.4. SammendragDenna artikel ger en översikt av bländning och kvantifiering av bländningkänslighet, som kan användas som kriterium för körkortstillstånd. Bländning är en viktig säkerhetsfråga vid bilkörning. Det är ett känt faktum att bländningsproblem i de tidiga stadierna av kataraktutveckling är en orsak till att män-niskor ger upp körning på natten. Bländning orsakas av den fysiska processen ljusspridning i ögat, vilket ger en slöja som ses över vägen. Enligt internationell överenskommelse måste bländning kvantifieras genom mätning av ljusspridningen, baserat på begreppet "ekvivalent luminans". Normala normer har definierats, inklusive beroende av straylight på ålder och katarakt. Ljusspridning kan mätas exakt med den psykofysiska 2AFC "kompensationsjämförelse metod", inklusive en pålitlighetskontroll. Ett instrument för ljusspridningsmätning är C-Quant, finns nu kommersiellt tillgängligt. Ljusspridning är ett grundläggande begrepp, där också andra aspekter av synkvalitet, såsom ansiktsigenkänning, kontrastkänslighet etc. ingår. Ljusspridning används i oftalmologi som en tidig indikation för kataraktoperation. Det är i stor utsträckning oberoende av visus. Denna översyn diskuterar de praktiska aspekterna för mätning ljuspridning och gränsvärden. Normala unga värden är runt log(s) = 0,9. För krävande yrken föreslås ett gränsvärde på 2× (0, 3 log, motsvarande 3 st...

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“…12 Straylight improves significantly in many patients after phacoemulsification in eyes with good preoperative visual acuity. 13 However, the contribution of the IOL type to postoperative straylight has not yet been elucidated.…”

Section: Straylight Measurements/lapid-gortzak Et Almentioning

confidence: 99%

Straylight Measurements in Two Different Apodized Diffractive Multifocal Intraocular Lenses

Lapid-Gortzak¹,

Łabuz²,

Meulen³

et al. 2015

J Refract Surg

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o r I g I n A L A r t I C L e ultifocal intraocular lenses (IOLs) were introduced in cataract surgery to address the problem of loss of accommodation following lensectomy and implantation of a monofocal IOL. There have been different multifocal designs, including diffractive bifocal, 1 apodized diffractive, 2 trifocal, refractive, zonal refractive, 1 rotational asymmetric refractive, 3 and accommodating IOLs in which the optic or optics need to move to achieve accommodation. 4 Bifocal diffractive apodized IOLs have a circular pattern on the optic surface, which allows for diffraction of incoming light into two main distinct foci. One focus is for distance vision and the secondary focus is for near vision. The diffraction patterns distribute the light to both foci with loss of energy; approximately 18% of light is directed outside the far and near focal points.2 As a result of multiple foci occurring in the eyeball at the same time and interfering with one another, the contrast sensitivity for both far and near foci decreases. 5In apodized diffractive IOLs, the far focus is dominant and receives more light, whereas the near focus receives less light. 2The patterns of the apodization can differ and not only allow changes in depth of focus with relation to the intensity of light distributed between the far and the near foci, but also changes in induced halos, contrast, and quality of vision with relation to the pupil size as a function of light intensity as part of the accommodative triad response. 6,7 M ABSTRACT PURPOSE: To evaluate differences in straylight between eyes implanted with a hydrophilic multifocal IOL (Seelens MF; Hanita Lenses, Hanita, Israel) and a hydrophobic multifocal IOL (SN6AD1; Alcon Laboratories, Inc., Fort Worth, TX). METHODS:In a prospective cohort study, routinely obtained straylight measurements (C-Quant; Oculus Optikgeräte, Wetzlar, Germany) 3 months after standard phacoemulsification for either cataract or refractive lens procedures were compared. Patients were implanted with either the SeeLens MF IOL or the SN6AD1 IOL. Postoperative straylight values, visual acuity, and refractive outcomes were compared. RESULTS:The SeeLens MF IOL was implanted in 84 eyes and the SN6AD1 IOL in 79 eyes. The difference in straylight was 0.08 (P = .01), with the SeeLens MF IOL having less straylight. Postoperative CDVA was logMAR -0.03 ± 0.06 in the SeeLens MF group, and logMAR -0.02 ± 0.08 in the SN6AD1 group. Mean postoperative refraction was +0.01 ± 0.43 and +0.06 ± 0.35 D, respectively. CONCLUSIONS:The Seelens MF IOL showed a straylight of log(s) 0.08 lower than the SN6AD1 IOL. In terms of spherical equivalent and visual acuity the lenses performed equally. More study will aid in understanding the causes and clinical impact of this difference.[J Refract Surg. 2015;31(11):746-751.]

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Straylight before and after phacoemulsification in eyes with preoperative corrected distance visual acuity better than 0.1 logMAR

Cited by 13 publications

References 25 publications

Ocular straylight in the normal pseudophakic eye

Ocular straylight in the normal pseudophakic eye

Measurement of straylight for glare assessment and driving.

Straylight Measurements in Two Different Apodized Diffractive Multifocal Intraocular Lenses

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