Purpose: To evaluate the percentage of eyes that could not be measured using optical biometry and ultrasound applanation and the reasons.
Setting: Department of Ophthalmology, Johannes Gutenberg-University Hospital, Mainz, Germany.
Methods: Optical biometry (IOLMaster, Carl Zeiss Meditec AG) and A-scan ultrasound biometry were performed consecutively in 253 eyes scheduled for cataract surgery the next day. Lens opacities were evaluated with the Opacity Lensmeter (Interzeag), and a slitlamp examination and measurement of visual acuity were performed. The 2 techniques were compared in terms of the rate of and reasons for primary measurement failure.
Results: Measurement with the IOLMaster was not possible in 44 eyes (17%). Failed measurements were the result of a combination of low visual acuity and lens opacity in 45% of eyes, posterior subcapsular opacity in 25%, and macular disease in 7%. Measurement with ultrasound biometry was not possible in 10 eyes (4%); 7 eyes were filled with silicone oil and in 3 cases, the patient refused biometry.
Conclusions: Optical biometry allowed comfortable, noncontact, high-precision measurement in the optical axis. Uncorrected visual acuity and lens opacity were predictors of successful measurements. Eyes with dense cataract or poor visual acuity are better evaluated using ultrasound applanation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0886-3350(02)01740-6 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Association of obesity with orbital fat expansion in thyroid eye disease.
BMC Ophthalmol
January 2025
Department of Ophthalmology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, No. 138, Sheng Li Road, Tainan, 704, Taiwan.
Background: To investigate the association between obesity and orbital fat expansion in proptosis of thyroid eye disease.
Methods: This observational study retrospectively enrolled 87 participants who received orbital fat decompression surgery for thyroid eye disease. Primary outcome measures included average body mass index (BMI) and the proportion of the study sample with overweight and obesity, compared with the general Taiwanese population.
Associations between choroidal thickness and rate of axial elongation in orthokeratology lens users.
Photodiagnosis Photodyn Ther
December 2024
Joint Shantou International Eye Center of Shantou University and The Chinese, University of Hong Kong, Shantou, Guangdong 515041, China. Electronic address:
Objective: To investigate the impact of using orthokeratology lenses (OK lenses) for one year on the axial length (AL) and choroidal thickness (ChT) in the 6 mm concentric central retinal region.
Methods: 36 myopic children (36 eyes) aged 8 to 16 years were enrolled. For the duration of one year, the OK group (18 subjects) utilized OK lenses, while the spectacles group (18 subjects) utilized single-vision spectacles as a control.
Comprehensive craniometry for sagittal synostosis.
Neurosurg Focus
January 2025
6Plastic Surgery, Vanderbilt University Medical Center, Nashville, Tennessee.
Objective: Sagittal synostosis is the most common type of craniosynostosis, resulting in deformity with distinctive morphological characteristics. These include occipital narrowing, parietal narrowing, anteriorly shifted vertex with parietal depression, and exaggerated frontal bossing. The traditional cephalic index affords limited reliability in quantifying initial severity and correction.
View Article and Find Full Text PDFRedefined Formula for Anterior Chamber Volume Calculation: Quantitative Analysis of Biometric Parameters Across Ocular Pathologies.
Clin Ophthalmol
December 2024
Riga Stradins University, Department of Ophthalmology, Riga, Latvia.
Purpose: This study evaluates the discrepancies between ACV measurements obtained from the Heidelberg Anterion and Zeiss IOLMaster 700 and investigates the significance of ACV and other ocular biometry parameters.
Patients And Methods: To investigate intraocular fluid circulation, a robust formula was developed for ACV measurement using the Zeiss IOLMaster 700. A pilot study was conducted to validate this formula, which relied on WTW, CCT, and ACD.
Comparison of ocular biometry and refractive outcomes using two swept-source optical coherence tomography-based biometers.
PLoS One
December 2024
Department of Ophthalmology, Samsung Medical Center School of Medicine, Sungkyunkwan University, Seoul, Republic of Korea.
Background: To evaluate the ocular biometry agreement and prediction of postoperative refractive outcomes obtained using two swept-source optical coherence tomography (SS-OCT) biometers: Anterion (Heidelberg Engineering, Heidelberg, Germany) and Argos (Alcon, Fort Worth, TX, USA).
Methods: Ambispective analysis was conducted on 105 eyes at the Samsung Medical Center, Seoul, Republic of Korea, between June 2021 and March 2022. Biometric values were assessed using both devices before cataract surgery.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!