The Effect of Cycloplegia on the Lenstar and the IOLMaster Biometry

Huang, Jinhai; McAlinden, Colm; Su, Binbin; Pesudovs, Konrad; Feng, Yifan; Hua, Yanjun; Yang, Feng; Pan, Chao; Zhou, Huyong; Wang, Qinmei

doi:10.1097/opx.0b013e3182772f4f

Cited by 76 publications

(111 citation statements)

References 33 publications

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“…The Lenstar provides measurements of corneal thickness, corneal curvatures, corneal diameter (white-to-white (WTW) distance), anterior chamber depth (ACD), pupil diameter, lens thickness, retinal thickness at the point of fixation, axial length (AL) and visual axis decentration 7. Numerous research studies have reported that this device provides repeatable measurements8–11 and is in agreement with other optical biometers 7 12 13. In addition, it has been shown to produce a more predictable refractive outcome than immersion ultrasound biometry 14…”

Section: Introductionmentioning

confidence: 82%

Repeatability and agreement of ocular biometry measurements: Aladdin versus Lenstar

McAlinden

Wang

et al. 2017

Br J Ophthalmol

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Section: Introductionmentioning

confidence: 82%

Repeatability and agreement of ocular biometry measurements: Aladdin versus Lenstar

McAlinden

Wang

et al. 2017

Br J Ophthalmol

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“…Cheung [9] found that the effect of cycloplegia on AL measurement with IOLmaster was insignificant in children aged from seven to 15 years; meanwhile, ACD measurement was significantly affected by cycloplegia. Huang et al [10] found that cycloplegia This device has also been found to provide repeatable, reproducible measurements and can be used interchangeably with Sirius (Scheimpflug camera and Placido-disk topography device) for CCT, ACD, mean K, and WTW [11]. From the SRK/T formula (by Sanders, Retzlaff and Kraff), P = A-(2.5 L)-0.9 K, in which P = lens implant power for emmetropia (diopters), L = axial length (mm.…”

Section: Discussionmentioning

confidence: 98%

The effect of pupillary dilatation on IOL power measurement by using the IOLMaster

2015

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The aim of this study is to assess the agreement of IOL power and ocular biometry measurements before and after pupillary dilatation by using the IOLMaster. This was the prospective nonrandomized cohort study. Measurements were taken with the IOLMaster (®) (Carl Zeiss Meditec AG, Jena, Germany) from healthy volunteers at the Department of Ophthalmology, King Chulalongkorn Memorial Hospital. Axial length (AL), keratometry both flattest and steepest (K1, K2), and anterior chamber depth (ACD) were measured before and after the dilatation of the pupil with 1 % tropicamide. The IOL power was calculated using the Sanders-Retzlaff-Kraff/Theoretical (SRK/T) formula. The mean difference of each parameter was assessed by Bland-Altman plot analysis. 384 eyes from 195 healthy volunteers were measured. The mean age of the patients was 52.39 ± 1.02 years (range 21-79). Pupillary dilatation had no significant effect on AL (p = 0.07), keratometry [steepest K (p = 0.95) and flattest K (p = 0.17)], and IOL power (Alcon SN60WF) (p = 0.40) obtained from the IOLMaster. However, ACD was significantly increased post-dilatation (p < 0.05). The Bland-Altman plot indicated good concordance in nearly all parameters except ACD. For ACD measurements, the 95 % limit of agreement between pre-dilatation and post-dilatation was -0.47 to 0.23 mm; therefore, 92.2 % of the measurement differences were with a LoA of -0.47 to 0.23 mm. There were no eyes that could not be measured by the IOLMaster. The dilatation of the pupil had no significant effect on AL, keratometry measurements, and SRK/T calculated IOL power. However, the ACD significantly increased post-dilatation.

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“…Huang ve ark., 43 hastada yaptıkları çalışmada, bulguları-mızla uyumlu olarak sikloplejinin AU üzerine ve hesaplanan göz içi merceği gücüne etkisinin sınırlı olduğunu bildirmişlerdir. 8 Chang ve ark. yüksek miyop gözlerde yaptıkları çalışmada, sikloplejinin AU üzerine anlamlı etki yapmadığını, ancak ÖKD üzerine etkisi nedeni ile göz içi merceği hesapla- malarında, özellikle yüksek miyopisi olan gözlerde siklopleji öncesi ve sonrası ölçümlerin ayrı değer-lendirilmesi gerektiğini vurgulamışlardır.…”

Section: Discussionunclassified

“…Bunun yanında günlük hayatta yaşa ve ortam özelliklerine bağlı olarak az veya çok uyum yaptı-ğımız her tedavi ve değerlendirmede dikkate alın-malıdır. 8 Modern göz içi merceği hesaplama formülle-rinde aksiyel uzunluk (AU) ve keratometri değer-lerinin yanında, diğer biyometrik değerlerinde kullanılması söz konusudur. 1 Glokom tanı ve tedavisinde de, başta merkezi kornea kalınlığı (MKK) ve ön kamara derinliği (ÖKD) olmak üzere tüm biyometrik parametrilerin yeri vardır.…”

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The Effect of Cycloplegia on Optic Biometry in School

Gürsoy¹,

Bilgeç²,

Bilgin³

2016

Turkiye Klinikleri J Ophthalmol

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Ö ÖZ ZE ET T A Am ma aç ç: : Bu çalışmanın amacı, okul çağı çocuklarında sikloplejinin optik biyometri üzerine etkisini incelemektir. G Ge er re eç ç v ve e Y Yö ön nt te em ml le er r: Siklopleji, 5 dk arayla birer damla %1'lik siklopentolat damlatıldıktan 30 dk sonra sağlandı. Oküler biyometri ölçümü "Lenstar" ile yapıldı. Aksiyel uzunluk (AU), merkezi kornea kalınlığı (MKK), ön kamara derinliği (ÖKD), lens kalınlığı (LK) ve ortalama keratometri değerleri analiz edilen parametrelerdi. Siklopleji öncesi ve sonrası ölçümler her çocukta tekrarlandı. Siklopleji öncesi ve sonrası ölçümler sağ ve sol gözlerde ayrı ayrı karşılaştı-rıldı. B Bu ul lg gu ul la ar r: : 8,33±1,13 (7-10 yıl) yaşlarında 55 erkek, 68 kız çocuğu toplam 123 okul çağı çocuğu değerlendirildi. Sağ gözlerde siklopleji sonrası ortalama sferik ekivalan (SE) (dioptri) 0,20±1,21'den 0,87±1,07'ye (p<0,01), MKK (μ) 551,89±37,23'ten 552,80±37,10'a (p=0,01) ve ÖKD (mm) 3,51±0,27'den 3,68±0,23'e (p<0,01) arttı. Ortalama AU (mm) 22,81±0,79'dan 22,80±0,78'e (p=0,02) ve LK (mm) 3,59±0,24'ten 3,43±0,16'ya (p<0,01) düştü. Sol gözlerde siklopleji sonrası ortalama SE (dioptri) 0,02±0,98'den 0,96±1,01'e (p<0,01), MKK (μ) 550,41±37,78'den 553,73±37,96'ya (p<0,01) ve ÖKD (mm) 3,53±0,26'dan 3,68±0,22'ye (p<0,01) arttı. LK (mm) 3,57±0,23'ten 3,43±0,16'ya (p<0,01) düştü. Her iki gözde ortalama keratometri değerleri ve sol gözde AU değişiklikleri istatistiksel olarak anlamlı değildi. S So on nu uç ç: : Siklopleji sonrası optik biyometride ÖKD ve MKK'de artış, LK'de azalma dikkate alınmalıdır. Çünkü modern göz içi merceği gücü hesaplamalarında AU yanında tüm parametreler etkili olmaktadır. AU ölçümlerindeki farklar daha küçük olmakla birlikte olgu düzeyinde değerlendirilmelidir.A An na ah h t ta ar r K Ke e l li i m me e l le er r: : Çocuk; biyometri; siklopleji; Lenstar A AB BS S T TR RA AC CT T O Ob bj je ec ct ti iv ve e: : To investigate the effect of cycloplegia on optic biometry in school children. M Ma at te er ri ia al l a an nd d M Me et th ho od ds s: : Cycloplegia was achieved 30 min after instilling 2 drops of 1% cyclopentolate 5 min apart. Ocular biometry measurement was performed with Lenstar. Axial length (AL), central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT) and mean keratometry values were the parametries analyzed. Measurements were repeated for each child before and after cycloplegia. The measurements before and after cycloplegia were compared in right and left eyes, separately. R Re es su ul lt ts s: : A total of 123 school children; 55 boys and 68 girls, aged 8.33±1.13 (7-10 years) were evaluated. After cycloplegia in right eyes the mean spherical equivalent (SE) (diopters) increased from 0.20±1.21 to 0.87±1.07 (p<0.01), CCT (μ) from 551.89±37.23 to 552.80±37.10 (p=0.01) and ACD (mm) from 3.51±0.27 to 3.68±0.23 (p<0.01). The mean AL (mm) decreased from 22.81±0.79 to 22.80±0.78 (p=0.02) and LT (mm) from 3.59±0.24 to 3.43±0.16 (p<0.01). After cycloplegia in left eyes the mean SE (diopters) increased from 0.02±0.98 to 0....

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The Effect of Cycloplegia on the Lenstar and the IOLMaster Biometry

Abstract: Cycloplegia affected ACD and WTW but not AL or corneal curvature measurements. Generally, good agreement was found between the Lenstar and the IOLMaster, although not for WTW. Differences between these devices do not produce a clinically significant impact on IOL power.

Cited by 76 publications

References 33 publications

Repeatability and agreement of ocular biometry measurements: Aladdin versus Lenstar

Repeatability and agreement of ocular biometry measurements: Aladdin versus Lenstar

The effect of pupillary dilatation on IOL power measurement by using the IOLMaster

The Effect of Cycloplegia on Optic Biometry in School

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