Comparison of Anterior Chamber Depth Measurements from the Galilei Dual Scheimpflug Analyzer with IOLMaster

Patel, Roma P.; Pandit, Rahul T.

doi:10.1155/2012/430249

Cited by 20 publications

(10 citation statements)

References 19 publications

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“…The mean ACD measurements from the IOLMaster 700 and Galilei G4 were closely correlated, whereas there was a poor correlation between A-scan and the other two devices. Similar to our study, Galilei had slightly longer ACD values than the IOLMaster, but the difference was clinically very small and closely correlated [ 12 ]. The IOLMaster uses a slit beam of light, which is directed at a 30-degree angle into the anterior chamber.…”

Section: Discussionsupporting

confidence: 85%

Comparison of Ocular Biometry Using New Swept-source Optical Coherence Tomography-based Optical Biometer with Other Devices

Cho

Lim

Choi

et al. 2018

Korean J Ophthalmol

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PurposeTo evaluate the agreement between optical biometry with swept-source optical coherence tomography-based optical biometry (IOLMaster 700) and other devices.MethodsA total of 137 eyes (78 patients) with cataracts were included in this retrospective study. Axial length (AL), anterior chamber depth (ACD), keratometry, and white-to-white (WTW) distance measured using IOLMaster 700 were compared with results for the following five different biometers: IOLMaster 500, A-scan, automated refractor, manual keratometry, and Galilei G4. Differences and correlations among the devices were assessed using the Bland-Altman plot and intraclass correlation coefficient (ICC).ResultsFor AL values, the IOLMaster 700, IOLMaster 500, and A-scan measurements showed excellent agreement (all ICC >0.99). For ACD values, ICC of IOLMaster 700 and Galilei G4 was 0.965 but A-scan was poorly correlated with either IOLMaster 700 or Galilei G4. The ICCs of IOLMaster 700 and other devices were all greater than 0.9 for average keratometry, but those of the mean cylinder keratometry were all between 0.7 and 0.8. The mean difference in the WTW distance between the IOLMaster 700 and Galilei G4 was 0.029 mm, but the ICC was 0.525. AL measurements were not possible for 10 eyes with the IOLMaster 500 but were obtained in all eyes with the IOLMaster 700.ConclusionsIn clinical practice, AL, ACD, and average keratometry values of IOLMaster 700 can be used interchangeably with those of the other devices tested. However, the ACD value between IOLMaster 700 and A-scan or the WTW distance between IOLMaster 700 and Galilei G4 are not interchangeable because of clinical and statistical differences in measurements between the devices.

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Section: Discussionsupporting

confidence: 85%

Comparison of Ocular Biometry Using New Swept-source Optical Coherence Tomography-based Optical Biometer with Other Devices

Cho

Lim

Choi

et al. 2018

Korean J Ophthalmol

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“…The anterior chamber depth (ACD), defined as the distance measured along the eye's optical axis from the posterior surface of the cornea to the anterior surface of the crystalline lens, [2], is an important biometric measurement. It is approximately 3.5mm (1.99-4.75 mm).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Ocular Anterior Chamber Depth and Body Mass Index in Normal Blacks in a Nigerian City

Aprioku

Ejimadu

2019

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Aim: To evaluate ocular anterior chamber depth (ACD) and body mass index (BMI) in a normal population in Port Harcourt City Local Government Area (LGA), with a view to determine formulae in estimating intraocular lens power for cataract surgeries and possible association with angle closure glaucoma and other ocular pathological conditions. Methods: This is a multi-stage study with inclusion criteria of Visual Acuity > 6/18, age greater than 18 years with no history of past ocular surgeries or trauma. Data obtained through a structured proforma included age, sex, tribe, occupation and level of education. Body Mass Index (BMI) was measured using a standard height and weight automated scale (SECA 769,220). Comprehensive ocular examination done and Anterior Chamber Depth (ACD) measured using Amplitude (A) scan ultrasonography (SONOMED PACSCAN 300AP). Data was analyzed using SPSS (Version 17), and p value was set at ≤ 0.05. Results: Four hundred and sixty six (466) subjects participated in the study made up of two hundred and twelve (212) males (45.5%) and two hundred and fifty four (254) females (54.5%) with M: F ratio of 1:1.2. The age range was 18-92 years and mean age of the subjects studied 43.0±14.2 years. Findings revealed mean ACD and Body Mass Index to be 3.1±0.5 mm and 26.9±6.2 kg/m2 respectively. The mean ACD was greater in males than females. There was a statistically significant relationship between age and ACD. Obesity was found to be higher in females (n=97; 78.2%) compared to the males among those with BMI >30Kg/m2 and this was found to be statistically significant (p=0.0001). A larger proportion of subjects with normal BMI and overweight BMI 25-29.5 Kg/m2 were males. There was a statistically significant difference in the ACD values between genders among those overweight (BMI 25- 29.5 Kg/m2) and the obese (BMI >30 Kg/m2). Conclusion: There was a statistically significant difference in the ACD values between genders among those overweight.

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“…The indices of anterior chamber depths (ACDs) are also important in IOL implantation, as a short ACD is considered a contraindication 8, 9. However, different cut-points of the abnormal values of ACD have been reported due to ethnic and measurement tools differences 10, 11, 12. One useful instrument is the Orbscan (Bausch and Lomb, Rochester, USA) as it allows measurement of many anterior segment parameters.…”

Section: Introductionmentioning

confidence: 99%

The distribution of orbscan indices in young population

Hashemi

Khabazkhoob

Yazdani

et al. 2017

Journal of Current Ophthalmology

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PurposeTo determine the distribution of anterior eye biometry indices, such as keratometry pachymetry, anterior chamber depth (ACD), pupil diameter, and corneal diameter, as measured by Orbscan instrument in a young Iranian population.MethodsA cross-sectional study was conducted, and subjects were selected through multistage cluster sampling from the students of Mashhad University of Medical Sciences. Objective and subjective refraction were performed followed by Orbscan imaging.ResultsA total of 1330 subjects were selected, 1121 of which participated in the study. After applying the exclusion criteria, the final analysis was performed on the data of 1051 subjects. The mean age of the participants was 26.1 ± 3.2 years (19–34 years old). The mean ± SD and 95% confidence interval (CI) of maximum keratometry, minimum keratometry, pupil diameter, corneal diameter, ACD, and central corneal thickness was 44.5 ± 1.7 (44.4–44.6), 43.1 ± 1.6 (43.0–43.2), 4.3 ± 0.9 (4.3–4.4), 11.7 ± 0.4 (11.7–11.7), 3.7 ± 0.3 (3.6–3.7), and 550.5 ± 35 (548.4–552.6), respectively. After adjusting for age and the mean spherical equivalent (MSE), maximum keratometry, minimum keratometry, central corneal thickness, and the thinnest pachymetry were statistically significantly higher in female subjects (P < 0.001) whilst the corneal diameter and ACD were higher in male subjects (P < 0.001). The pupil diameter and ACD showed statistically significant changes with age (P < 0.001). The MSE was only correlated with maximum keratometry and ACD (P < 0.001).ConclusionIn this study, the distribution of Orbscan measurements for the anterior segment parameters was reported in a large sample of the young Iranian population. Age, gender, and refractive error may affect the orbscan measurements.

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Comparison of Anterior Chamber Depth Measurements from the Galilei Dual Scheimpflug Analyzer with IOLMaster

Cited by 20 publications

References 19 publications

Comparison of Ocular Biometry Using New Swept-source Optical Coherence Tomography-based Optical Biometer with Other Devices

Comparison of Ocular Biometry Using New Swept-source Optical Coherence Tomography-based Optical Biometer with Other Devices

Evaluation of Ocular Anterior Chamber Depth and Body Mass Index in Normal Blacks in a Nigerian City

The distribution of orbscan indices in young population

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