Gundersen et al. conducted a postintervention diagnostic evaluation to compare the visual acuity and quality of vision between bilateral implantation of a trifocal IOL (AT LISA tri 839MP) and blended bifocal IOL (ReSTOR +2.5/+3.0. The AT LISA tri from ZEISS provided significantly better intermediate visual acuity in the viewing distance range of 2 m to 67 cm. Clinical Ophthalmology 2016;10: 805-811
The new swept-source optical coherence tomography (SS-OCT) biometer showed good repeatability with an optical low-coherence reflectometry biometer (Lenstar 900). Results show that the IOLMaster 700 from ZEISS measured the axial length with fewer dropouts compared with the Lenstar 900 even in dense cataracts. Find out more on PubMed. J Cataract Refract Surg. 2016 Apr;42(4): 577-8
In a recent study Kohnen et al. evaluated the reliability and validity of anterior chamber depth (ACD) and corneal diameter measurements of 4 different devices. ACD and white-to-white distance were measured with Pentacam HR, IOL Master 500, LenStar 900, and Visante OCT. Unlike previous research the authors found no significant difference between the measurements. Cornea. 2016;35(7): 838-42
Partial coherence interferometry (PCI) as the basic ranging technology for modern optical biometry and for optical coherence tomography (OCT) was introduced for biomedical applications in the 1980s. The aim of the recent article of Hitzenberger et al. is to describe key developments of optical biometry and OCT for ophthalmic applications. Therefore the article provides an overview of key developments in PCI and OCT and helps to establish both technologies as the gold standards in their respective fields. IOVS July 2016, Vol.57, OCT460-OCT474
In a recent study of an older population in southern China, male subjects tended to have a deeper anterior chamber, a longer eye and a flatter cornea, compared with female subjects. Additionally, male subjects in the higher age groups generally had a shallower anterior chamber depth (ACD), compared with younger male subjects.
One common challenge before cataract surgery is to detect and document macular disease. In a recent study published in JCRS, Nino Hirnschall et al from Hanusch Hospital, Vienna (Austria) assessed the IOLMaster 700 in terms of sensitivity and specificity for detecting macular disease with its swept-source OCT scan during routine biometry. Also, all eyes were assessed using a dedicated retinal OCT device (RTVue).
Research of Das et al. demonstrated the uses and applications of ZEISS RESCAN 700 in Micro Incision Cataract and Femtosecond Laser Assisted Cataract Surgery. The RESCAN™ 700 showed a very promising role for both of these technologies in the future for cataract surgery. Find out more on PubMed.
To evaluate measurement agreement between an optical low-coherence interferometry (OLCI) biometer and the ZEISS IOLMaster 500, based on partial-coherence interferometry (PCI), Hoffer et al. enrolled two groups of patients. While agreement was generally good, small differences make device specific optimization of constants necessary.
In this study published by Kunert et al. in the Journal of Cataract Refractive Surgery (JCRS), the ZEISS IOLMaster 700 proved to be in strong agreement with both a PCI biometer and an OLCR biometer, and demonstrated greater repeatability than either of these devices.
Both the ZEISS IOLMaster 700 and the ZEISS IOLMaster 500 demonstrated excellent repeatability and reproducibility in a recent study by Prof. Srivannaboon et al. published in the Journal of Cataract Refractive Surgery (JCRS). Additionally, the IOLMaster 700 demonstrated superior lens penetration ability and axial length measurements.
This study by Bertelmann et al., published in the European Journal of Ophthalmology, evaluated how well a full-eye-length SWEPT source optical coherence tomography (OCT) biometer (ZEISS IOLMaster 700) was able to detect alterations in foveal pit morphology as part of standard intraocular lens (IOL) biometry procedures.
Announced by Prof. Akman (Baskent University, Ankara) himself two months ago here in the Cataract Community, Prof. Akman's publication on the IOLMaster 700 in the British Journal of Ophthalmology is now available via Open Access. Read more about his results.
In a study including 384 eyes from 195 healthy volunteers the biometric variation of axial length (AL), flattest and steepest keratometry (K1, K2)), and anterior chamber depth (ACD) before and after pharmacologic pupil dilation was measured by the IOLMaster. For both measurements the prediction for IOL power based on the SRK/T formula was calculated. AL and K variation was not significant, whereas ACD increased significantly after dilation. IOL power calculation was not affected by pupil dilation because ACD is not used in the SRK/T formula. Go to the abstract on PubMed to find out more.
Prof. Srivannaboon et al. of Siriraj Hospital, Mahidol University, Bangkok, compared optical biometry measurements of a standard biometer (IOLMaster 500) and an advanced swept-source biometer (IOLMaster 700). Read the abstract on PubMed to find out more.
Cataract surgeries performed in the UK between 2006 and 2010 are investigated in terms of outcomes, intraoperative and postoperative complications in a database study. This analysis provides useful data allowing cataract surgery benchmarking. Go to the free full text on journal Eye to find out more.
Daniel Chang, MD of the Empire Eye and Laser Center, Bakersfield, and George O. Waring, MD FACS FRCOpth, describe their approaches to fixation and centration in detail in a peer reviewed publication in the American Journal of Ophthalmology. Here is the link to the abstract on Pubmed.
Measurement errors of 24 different ophthalmic devices were compared using Pentacam, Orbscan and the IOLMaster as a reference. Only a minority of the results were equivalent which directly affects clinical studies or patient follow-ups using different devices. Read this abstract on PubMed to find out more.
Evaluating the foveal pit morphology during optical biometry measurements using swept-source OCT scan provides useful information for subsequent patient examination and further treatment planning for cataract surgery. These are the findings of a research project comprised of 146 eyes of 146 patients - phakic (group I) and pseudophakic (group II) - and conducted at Marburg University by T. Bertelmann et al. These findings were first presented at ESCRS 2014 and recently published in the European Journal of Ophthalmology.
Is the IOLMaster 500 a significant improvement over two current offerings: the IOLMaster Version 5 (also from ZEISS) and the Lenstar LS900® (Haag-Streit, Koeniz Switzerland)? Read this paper from 2010 to review findings from evaluations performed by three independent sites (Vienna / Austria; Guadalajara / Mexico; Columbus / USA).
To investigate repeatability of the keratometric measurement performed with the Option Reference Image of the IOLMaster 500, a clinical trial was conducted at the HELIOS Klinikum Erfurt, Germany from May to August 2013. Download this pdf to learn more.