A5025651541- Ophthalmology and Visual Impairment Studies
- Intraocular Surgery and Lenses
- Corneal surgery and disorders
- Glaucoma and retinal disorders
- Ophthalmology and Eye Disorders
- Facial Trauma and Fracture Management
- Advanced Measurement and Metrology Techniques
- Ocular Disorders and Treatments
- Corneal Surgery and Treatments
- Optical Systems and Laser Technology
- Ocular Oncology and Treatments
- Connexins and lens biology
- Ocular and Laser Science Research
- Cutaneous Melanoma Detection and Management
- Dental Education, Practice, Research
- Renal cell carcinoma treatment
- Scoliosis diagnosis and treatment
- Healthcare Policy and Management
- Healthcare Systems and Reforms
- Delphi Technique in Research
- Brain Metastases and Treatment
- Advanced Optical Sensing Technologies
- Surgical Sutures and Adhesives
- History of Medical Practice
- Traumatic Ocular and Foreign Body Injuries
University of Southern California
1994-2024
Keck Hospital of USC
2020-2024
Alcon (China)
2022
National Health Service
2015
Virginia Mason Lynnwood Medical Center
1978-2004
Martin Luther King, Jr. Multi-Service Ambulatory Care Center
1993
American University of Beirut
1979
Purpose: To analyze the accuracy of newer intraocular lens power formulas in long and short eyes measured using sum-of-segments biometry. Setting: Private practice, Lynwood, California. Design: Retrospective observational study. Methods: 595 patients scheduled for cataract surgery had their The expected residual refractions were calculated Barrett Universal II (B II), True Axial Length (BTAL), Emmetropia Verifying Optical (EVO), Hill-RBF, Hoffer QST, Holladay 2, 2-NLR, K6, Kane, Olsen,...
PURPOSE: To investigate the accuracy of measurements provided by a new optical biometer (OA-2000, Tomey Corporation, Nagoya, Japan) for calculating intraocular lens (IOL) power and to compare refractive outcomes those obtained with IOLMaster 500 (Carl Zeiss Meditec, Jena, Germany). METHODS: In this interventional multicenter study, consecutive patients having cataract surgery were enrolled. Only IOL model used in largest sample was selected eyes implanted that subsequently analyzed. The...
To compare axial length measurements based on multiple specific refractive indices for each segment of the eye to those obtained using a single index entire and evaluate subsequent effects IOL power calculation.One site in Lynwood, CA.Single-arm, non-interventional, non-randomized retrospective chart review.Eyes undergoing cataract surgery where biometry calculations were calculated with (multiple) evaluated. A simulated was case (single). The expected residual refractions different formulas...
Fourteen patients with unilateral exophthalmos were found on A-scan ultrasound examination to have enlarged extraocular muscles. Thyroid dysfunction later was documented in 12 (86%) by laboratory tests and subsequent clinical examination. The suspicion of endocrine orbitopathy based the presence muscles both orbits difference thickness between corresponding orbital including specific muscle measurements is a simple apparently reliable method diagnosing early thyroid orbitopathy.
Purpose: To evaluate the astigmatic correction obtained with a toric intraocular lens using keratometric readings (Ks) from swept-source optical coherence tomography (SS-OCT) biometer and Barrett formula its predicted posterior corneal astigmatism (PCA) value to compare results those expected by OCT Ks measured PCA scheimpflug topographer SimKs Scheimpflug topographer. Setting: Private practice, Lynwood, California. Design: Retrospective observational study. Methods: All measurements were...
To obtain consensus on the key areas of burden associated with existing devices and to understand requirements for a comprehensive next-generation diagnostic device be able solve current challenges provide more accurate prediction intraocular lens (IOL) power presbyopia correction IOL success.Thirteen expert refractive cataract surgeons including three steering committee (SC) members constituted voting panel. Three rounds included Round 1 structured electronic questionnaire, 2 virtual...
To establish a new formula for intraocular (IOL) power calculation.Private practice, Lynwood, California, USA.Retrospective observational and prospective evaluation.In this 2-part retrospective study followed by evaluation, the postoperative anterior pseudophakic distance (APD) was correlated with ante-nucleus (AND), nucleus thickness (NT) of cataractous lens, axial length. An estimated APD (EAPD) equation established used prospectively in on eyes scheduled cataract surgery.Correlations were...
To validate the extrapolated norms or e-norms methodology in establishing a reference range for biometric data used intraocular lens power calculation.All measurements were performed with an optical low-coherence reflectometer. A novel technique, methodology, was to determine normative values of measurements.Eyes (n=500) measured evaluate axial length (AL), K readings (Ks), anterior chamber depth (ACD) and thickness (LT). Using normal AL ranged from 22.50 24.50 mm (mean=23.50 mm),...
From the Department of Ophthalmology, The Keck School Medicine University Southern California, Los Angeles, California (H.J. Shammas); Shammas Eye Medical Center, Lynwood, Shammas, M.C. Shammas). Corresponding author: H. John MD, 3510 Martin Luther King Jr Blvd, CA 90262. Email: [email protected]. Presented at IOL Power Club Meeting, Palm Springs, October 2023. Disclosures: H.J. is a consultant to Alcon Laboratories, Inc. reports no financial interests. First author:H. MDDepartment