1. Articles from Kenneth J. Hoffer

    1-11 of 11
    1. Repeatability of new optical biometer and agreement with two validated optical biometers, all based on swept-source optical coherence tomography

      Repeatability of new optical biometer and agreement with two validated optical biometers, all based on swept-source optical coherence tomography

      Purpose: to evaluate the repeatability of the measurements provided by a new optical biometer (EyeStar 900, Haag-Streit) based on swept-source optical coherence tomography (SS- OCT) and their agreement with the measurements given by two validated biometers based on the same technology, the IOLMaster 700 (Carl Zeiss Meditec) and Argos (Movu). Setting: IRCCS G.B. Bietti Foundation, Rome, Italy. Design: Prospective evaluation of diagnostic test. Methods: In a series of unoperated eyes, three consecutive scans were acquired with the EyeStar 900, and one with the IOLMaster 700 and the Argos. The following biometry parameters were analyzed: axial length (AL), keratometry (K ...

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    2. Split-Window OCT biometry in pseudophakic eyes

      Split-Window OCT biometry in pseudophakic eyes

      Purpose: To determine the utility of Split-Window optical coherence tomography OCT (SW-OCT) biometry in measuring ocular axial dimensions as well as imaging the intraocular lens (IOL) and posterior capsule in pseudophakic eyes. Methods: Sixty-nine pseudophakic eyes of 69 subjects were enrolled in the study. The results of SW-OCT biometry implemented in the SD OCT device for posterior and anterior segment imaging (REVO NX, Optopol Technology) were compared with those obtained with the SS-OCT-based biometer IOLMaster 700 (Carl Zeiss Meditec). Differences in measurement values between the two biometers were determined using the paired t-test. Agreement was assessed through intraclass correlation coefficients ...

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    3. Agreement of intraocular lens power calculation between 2 SS-OCT–based biometers

      Agreement of intraocular lens power calculation between 2 SS-OCT–based biometers

      Purpose: To assess agreement of measurements by 2 swept-source optical coherence tomography biometers and to evaluate the prediction error (PE) in intraocular lens power calculation with 7 formulas. Setting: Tertiary public eye hospital. Design: Consecutive observational. Methods: Axial length (AL), keratometry (K), anterior chamber depth (ACD), lens thickness (LT), and corneal diameter (CD) were measured with the IOLMaster 700 (Biometer A) and Anterion (Biometer B). Agreement was quantified by the limits of agreement and concordance correlation coefficient (CCC). The PE, the median absolute error, and the mean absolute error of the Barrett Universal II, EVO 2.0, Haigis, Hoffer Q ...

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    4. Agreement of IOL power calculation between IOLMaster 700 and Anterion swept source optical coherence tomography-based biometers

      Agreement of IOL power calculation between IOLMaster 700 and Anterion swept source optical coherence tomography-based biometers

      Purpose: To assess agreement of measurements by two swept source optical coherence tomography (SS-OCT) biometers and to evaluate the prediction error (PE) in intraocular lens (IOL) power calculation with seven formulas. Setting: Tertiary public eye hospital. Design: Consecutive observational. Methods: Axial length (AL), keratometry (K), anterior chamber depth (ACD), lens thickness (LT), and corneal diameter (CD) were measured with IOL Master 700 (Biometer A) and Anterion (Biometer B). Agreement was quantified by the limits of agreement (LoAs) and concordance correlation coefficient (CCC). The PE, the median absolute error (MedAE), and the mean absolute error (MAE) of the Barrett Universal II ...

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    5. Repeatability of automated measurements by a new anterior segment optical coherence tomographer and biometer and agreement with standard devices

      Repeatability of automated measurements by a new anterior segment optical coherence tomographer and biometer and agreement with standard devices

      We assess repeatability of automatic measurements of a new anterior segment optical coherence tomographer and biometer (ANTERION) and their agreement with those provided by an anterior segment-optical coherence tomography device combined with Placido-disk corneal topography (MS-39) and a validated optical biometer (IOLMaster 500). A consecutive series of patients underwent three measurements with ANTERION and one with MS-39. A subgroup of patients underwent biometry also with IOLMaster 500. Repeatability was assessed by means of within-subject standard deviation, coefficient of variation (COV), and intraclass correlation coefficient (ICC). Agreement was investigated with the 95% limits of agreement. Paired t-test and Wilcoxon matched-pairs test ...

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    6. Comparison Of Formulas Accuracy For IOL Power Calculation Based On Measurements By A SWEPT-SOURCE Optical Coherence Tomography Optical Biometer

      Comparison Of Formulas Accuracy For IOL Power Calculation Based On Measurements By A SWEPT-SOURCE Optical Coherence Tomography Optical Biometer

      Purpose To analyze the results of intraocular lens (IOL) power calculation using measurements by a swept-source optical coherence tomography (SS-OCT) optical biometer. Setting IRCCS G.B. Bietti Foundation, Rome, Italy. Design Evaluation of a diagnostic test instrument. Methods Preoperative measurements by the OA-2000 (Tomey Inc.) were taken in a consecutive series of patients undergoing cataract surgery with one IOL model (AcrySof SN60WF, Alcon Laboratories, Inc.). Measurements were entered into the following formulas: Barrett Universal II, EVO, Haigis, Hoffer Q, Holladay 1, Holladay 2, Holladay 2 with axial length adjustment, Kane, Olsen, Panacea, SRK/T, T2 and VRF. When refraction was ...

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    7. Repeatability and reproducibility of optical biometry implemented in a commercially-available optical coherence tomography device and comparison with Lenstar

      Repeatability and reproducibility of optical biometry implemented in a commercially-available optical coherence tomography device and comparison with Lenstar

      P urpose To examine the repeatability and reproducibility of biometry provided by a new anterior-posterior segment spectral-domain optical coherence tomography (SD-OCT) device (Revo NX, Optopol Technology Sp. z o.o., Zawiercie, Poland), and to compare them to those provided by a validated low-coherence optical reflectometry (LCOR) biometer, the Lenstar LS 900. Setting Hygeia Clinic, Gdańsk, Poland Design Prospective evaluation of diagnostic test. Methods Axial length (AL), lens thickness (LT), central corneal thickness (CCT) and anterior chamber depth (ACD, corneal epithelium to lens) were measured in 63 eyes of 63 patients. Two skilled operators, in random order, obtained three measurements with ...

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    8. Accuracy of a New Swept-Source Optical Coherence Tomography Biometer for IOL Power Calculation and Comparison to IOLMaster

      Accuracy of a New Swept-Source Optical Coherence Tomography Biometer for IOL Power Calculation and Comparison to IOLMaster

      PURPOSE: To investigate the accuracy of the measurements provided by a new optical biometer (OA-2000, Tomey Corporation, Nagoya, Japan) for calculating the intraocular lens (IOL) power and to compare the refractive outcomes to those obtained with the IOLMaster 500 (Carl Zeiss Meditec, Jena, Germany). METHODS: In this interventional multicenter study, consecutive patients having cataract surgery were enrolled. Only the IOL model used in the largest sample of patients was selected and the eyes implanted with that IOL were subsequently analyzed. The OA-2000, an optical biometer based on swept-source optical coherence tomography (SS-OCT), was used to measure axial length and corneal ...

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    9. Re: Goto et al.: Prediction of postoperative intraocular lens position with angle-to-angle depth using anterior segment optical coherence tomography (Ophthalmology. 2016;123:2474-2480)

      Re: Goto et al.: Prediction of postoperative intraocular lens position with angle-to-angle depth using anterior segment optical coherence tomography (Ophthalmology. 2016;123:2474-2480)

      To the Editor: We read with interest the study by Goto et al, 1 who described a new formula to predict the postoperative position of the intraocular lens (IOL). Although their results are interesting and might be useful for IOL power calculation, we feel that some comments are necessary. First, comparing what they define as the “postoperative external anterior chamber depth,” either measured or predicted by anterior segment optical coherence tomography, to the IOL position, as predicted by thin lens formulas, is not the proper method. The measurements performed by the authors, in fact, refer to a thick lens system ...

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    10. Repeatability and interobserver reproducibility of a new optical biometer based on swept-source optical coherence tomography and comparison with IOLMaster

      Repeatability and interobserver reproducibility of a new optical biometer based on swept-source optical coherence tomography and comparison with IOLMaster

      Objective To evaluate the precision of the measurements in healthy subjects obtained with a new optical biometer (OA-2000, Tomey, Nagoya, Japan) using swept-source optical coherence tomography (SS-OCT) and compare these measurements with those provided by the IOLMaster v5.4 (Carl Zeiss Meditec AG, Jena, Germany) using partial coherence interferometry (PCI). Methods Axial length (AL), keratometry (K) over 2.5 mm and 3.0 mm diameters, anterior chamber depth (ACD) (corneal epithelium to lens), lens thickness (LT), central corneal thickness and corneal diameter (CD) were measured with SS-OCT by two experienced operators. Intraobserver repeatability and interobserver reproducibility were assessed. AL, ACD ...

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    11. Comparison of a new optical biometer using swept-source optical coherence tomography and a biometer using optical low-coherence reflectometry

      Comparison of a new optical biometer using swept-source optical coherence tomography and a biometer using optical low-coherence reflectometry

      Purpose To investigate agreement between the IOLMaster 700 based on swept-source optical coherence tomography (SS-OCT) and the Lenstar LS 900 based on optical low-coherence reflectometry (OLCR). Setting Private practice, Castrop-Rouxelle, Germany. Design Prospective evaluation of diagnostic test. Methods Axial length (AL), keratometry (K), anterior chamber depth (corneal epithelium to lens) (ACD), lens thickness, and central corneal thickness (CCT) were measured in 183 eyes of 183 patients. Analyses used a paired t test, Pearson correlation coefficient ( r ), and Bland-Altman plots. Intraocular lens (IOL) power calculations were compared using the Hoffer Q, Holladay 1, and SRK/T formulas. Results The difference in ...

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    1-11 of 11
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    1. (6 articles) UCLA
    2. (5 articles) Carl Zeiss Meditec
    3. (3 articles) Tomey Corporation
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    Repeatability and interobserver reproducibility of a new optical biometer based on swept-source optical coherence tomography and comparison with IOLMaster Comparison of a new optical biometer using swept-source optical coherence tomography and a biometer using optical low-coherence reflectometry Re: Goto et al.: Prediction of postoperative intraocular lens position with angle-to-angle depth using anterior segment optical coherence tomography (Ophthalmology. 2016;123:2474-2480) Accuracy of a New Swept-Source Optical Coherence Tomography Biometer for IOL Power Calculation and Comparison to IOLMaster Repeatability and reproducibility of optical biometry implemented in a commercially-available optical coherence tomography device and comparison with Lenstar Comparison Of Formulas Accuracy For IOL Power Calculation Based On Measurements By A SWEPT-SOURCE Optical Coherence Tomography Optical Biometer Repeatability of automated measurements by a new anterior segment optical coherence tomographer and biometer and agreement with standard devices Agreement of IOL power calculation between IOLMaster 700 and Anterion swept source optical coherence tomography-based biometers Agreement of intraocular lens power calculation between 2 SS-OCT–based biometers Split-Window OCT biometry in pseudophakic eyes The truth about invisible posterior vitreous structures Increased Macrophage-like Cell Density in Retinal Vein Occlusion as Characterized by en Face Optical Coherence Tomography