1. Rohit Varma

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    1. Mentioned In 31 Articles

    2. Effect of Scan Size on Glaucoma Diagnostic Performance Using OCT Angiography En Face Images of the Radial Peripapillary Capillaries

      Effect of Scan Size on Glaucoma Diagnostic Performance Using OCT Angiography En Face Images of the Radial Peripapillary Capillaries
      Precis: When comparing 4.54.5mm to 6.06.0mm optical coherence tomography angiography scans of the radial peripapillary capillaries (RPCs) for glaucoma diagnostic capability, there was a trend of 4.5 scans outperforming 6.0 scans, especially for inferior, nasal, and superior quadrants. Objectives: The main purpose of this study was to compare diagnostic ability of peripapillary vessel parameters from 4.54.5mm (4.5) and 6.06.0mm ...
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    3. Quantitative Evaluation of Gonioscopic and EyeCam Assessments of Angle Dimensions Using Anterior Segment Optical Coherence Tomography

      Quantitative Evaluation of Gonioscopic and EyeCam Assessments of Angle Dimensions Using Anterior Segment Optical Coherence Tomography
      Purpose : To evaluate the relationship between angle dimensions assessed by gonioscopy or EyeCam and anterior segment optical coherence tomography (AS-OCT). Methods : Subjects aged 50 years or older were recruited from the Chinese American Eye Study (CHES). Each subject underwent a complete ocular exam, including gonioscopy, AS-OCT, and EyeCam. Angle closure was defined as three or more quadrants in which pigmented trabecular meshwork could not be visualized. Angle opening distance (AOD ...
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    4. Diagnostic Performance of Macular Versus Peripapillary Vessel Parameters by Optical Coherence Tomography Angiography for Glaucoma

      Diagnostic Performance of Macular Versus Peripapillary Vessel Parameters by Optical Coherence Tomography Angiography for Glaucoma
      Purpose : To compare the diagnostic ability of the vessel parameters in macular and peripapillary regions measured using spectral-domain optical coherence tomography angiography (SD-OCTA) in differentiating primary open-angle glaucoma (POAG) from healthy eyes. Methods : POAG patients and healthy subjects underwent 6 6-mm scans centered on the macula and optic nerve head. Commercially available automatic segmentation created en face images from SD-OCTA of the superficial retinal layer (SRL) of the macular (m ...
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    5. Peripapillary microvasculature in the retinal nerve fiber layer in glaucoma by optical coherence tomography angiography: focal structural and functional correlations and diagnostic performance

      Peripapillary microvasculature in the retinal nerve fiber layer in glaucoma by optical coherence tomography angiography: focal structural and functional correlations and diagnostic performance
      ...ace M Richter,1,* Beau Sylvester,1,* Zhongdi Chu,2 Bruce Burkemper,1 Ingy Madi,1 Ryuna Chang,1 Alena Reznik,1 Rohit Varma,1 Ruikang K Wang2 1Department of Ophthalmology, USC Roski Eye Institute, Keck School of Medicine o...
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    6. Correlation Between Intraocular Pressure and Angle Configuration Measured by Optical Coherence Tomography: The Chinese American Eye Study

      Correlation Between Intraocular Pressure and Angle Configuration Measured by Optical Coherence Tomography: The Chinese American Eye Study
      PURPOSE To characterize the relationship between angle configuration measured by anterior segment optical coherence tomography (AS-OCT) and intraocular pressure (IOP). DESIGN Cross-sectional study. PARTICIPANTS Subjects aged 50 years or older were identified from the Chinese American Eye Study (CHES), a population-based epidemiological study in Los Angeles, CA. METHODS Each subject underwent a complete ocular exam including Goldmann applanation tonometry, gonioscopy, and AS-OCT imaging. Four AS-OCT images were analyzed per eye ...
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      Mentions: Rohit Varma UCLA
    7. Structural and Functional Associations of Macular Microcirculation in the Ganglion Cell-inner Plexiform Layer in Glaucoma Using Optical Coherence Tomography Angiography

      Structural and Functional Associations of Macular Microcirculation in the Ganglion Cell-inner Plexiform Layer in Glaucoma Using Optical Coherence Tomography Angiography
      Purpose: To quantify retinal microvasculature within the macular ganglion cell-inner plexiform layer (GCIPL) in primary open angle glaucoma (POAG) and normal eyes, determine association of vessel parameters with structural and functional measures, and report diagnostic accuracy of vessel parameters. Methods: POAG and normal patients underwent 6▒mm6▒mm macula scans (Angioplex TM optical coherence tomography angiography [OCTA]; Cirrus TM HD-OCT 5000); and Humphrey Field Analyzer II-i 24-2 visual field (VF ...
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    8. Comparison of Glaucoma Progression Detection by Optical Coherence Tomography and Visual Field

      Comparison of Glaucoma Progression Detection by Optical Coherence Tomography and Visual Field
      Purpose To compare longitudinal glaucoma progression detection using optical coherence tomography (OCT) and visual field (VF). Design Validity assessment Method We analyzed subjects with more than 5 follow-up visits (every 6 months) in the multi-center Advanced Imaging for Glaucoma Study. Fourier-domain optical coherence tomography (OCT) was used to map the thickness of the peripapillary retinal nerve fiber layer (NFL) and ganglion cell complex (GCC). OCT-based progression detection was defined as ...
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    9. USC ReceivesNIH Grant for Defining the Relationship of Retinal MIcrocirculation with Glaucoma, Systemic Disease, and Ocular Anatomic Factors in African Americans

      USC ReceivesNIH Grant for Defining the Relationship of Retinal MIcrocirculation with Glaucoma, Systemic Disease, and Ocular Anatomic Factors in African Americans
      ...dition to formal coursework, training will be greatly enhanced by regular meetings with renowned mentors (Dr. Rohit Varma, Dr. Ruikang Wang, Dr. James Gauderman, and Dr. Roberta McKean-Cowdin), as well as participation i...
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    10. USC Roski Eye Institute experts present novel research in preventive care, diagnosis and treatment of visual impairment and eye diseases at ARVO Annual Meeting

      USC Roski Eye Institute experts present novel research in preventive care, diagnosis and treatment of visual impairment and eye diseases at ARVO Annual Meeting
      ... improved diagnoses and creates innovative treatments that preserve, and in some cases, restore vision," said Rohit Varma , MD, MPH, dean of the Keck School of Medicine of USC and director of the USC Roski Eye Institute....
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    11. Benefit of Measuring Anterior Segment Structures Using an Increased Number of Optical Coherence Tomography Images: The Chinese American Eye Study

      Benefit of Measuring Anterior Segment Structures Using an Increased Number of Optical Coherence Tomography Images: The Chinese American Eye Study
      Purpose : The purpose of this study was to evaluate the benefit of analyzing an increased number of anterior segment optical coherence tomography (AS-OCT) images on measurement values of various anterior segment parameters. Methods : Subjects for this cross-sectional study were recruited from the Chinese American Eye Study (CHES), a population-based study in Los Angeles, CA. Thirty-two AS-OCT images were acquired from one eye each of 83 consecutive subjects. Sixteen parameters were ...
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      Mentions: Rohit Varma UCLA
    12. Longitudinal and Cross-Sectional Analyses of Age and Intraocular Pressure Effects on Retinal Nerve Fiber Layer and Ganglion Cell Complex Thickness

      Longitudinal and Cross-Sectional Analyses of Age and Intraocular Pressure Effects on Retinal Nerve Fiber Layer and Ganglion Cell Complex Thickness
      Purpose : To study the effect of age and intraocular pressure (IOP) on retinal nerve fiber layer (NFL) and ganglion cell complex (GCC) thickness in normal eyes. Methods : We analyzed the data from subjects enrolled in the multi-center longitudinal Advanced Imaging for Glaucoma (AIG) Study (www.AIGStudy.net). The data included yearly visits from the normal subjects group in the AIGS study. Fourier-domain optical coherence tomography (OCT) was used to map ...
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    13. Regression Analysis of Optical Coherence Tomography Disc Variables for Glaucoma Diagnosis

      Regression Analysis of Optical Coherence Tomography Disc Variables for Glaucoma Diagnosis
      Purpose: To report diagnostic accuracy of optical coherence tomography (OCT) disc variables using both time-domain (TD) and Fourier-domain (FD) OCT, and to improve the use of OCT disc variable measurements for glaucoma diagnosis through regression analyses that adjust for optic disc size and axial length-based magnification error. Design: Observational, cross-sectional. Participants: In total, 180 normal eyes of 112 participants and 180 eyes of 138 participants with perimetric glaucoma from the ...
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    14. Predicting Development of Glaucomatous Visual Field Conversion Using Baseline Fourier-Domain Optical Coherence Tomography

      Predicting Development of Glaucomatous Visual Field Conversion Using Baseline Fourier-Domain Optical Coherence Tomography
      Purpose To predict the development of glaucomatous visual field (VF) defects using Fourier-domain optical coherence tomography (FD-OCT) measurements at baseline visit. Design Multi-center longitudinal observational study. Glaucoma suspects and pre-perimetric glaucoma participants in the Advanced Imaging for Glaucoma Study. Methods The optic disc, the peripapillary retinal nerve fiber layer (NFL), and macular ganglion cell complex (GCC) were imaged with FD-OCT VF was assessed every 6 months. Conversion to perimetric glaucoma ...
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    15. Combining measurements from three anatomical areas for glaucoma diagnosis using Fourier-domain optical coherence tomography

      Combining measurements from three anatomical areas for glaucoma diagnosis using Fourier-domain optical coherence tomography
      Aims To improve the diagnostic power for glaucoma by combining measurements of peripapillary nerve fibre layer (NFL), macular ganglion cell complex (GCC) and disc variables obtained with Fourier-domain optical coherence tomography (FD-OCT) into the glaucoma structural diagnostic index (GSDI). Methods In this observational, cross-sectional study of subjects from the Advanced Imaging of Glaucoma Study, GCC and NFL of healthy and perimetrical glaucoma subjects from four major academic referral centres of ...
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    16. Measurement of retinal blood flow in normal Chinese American subjects by Doppler Fourier-domain optical coherence tomography

      Measurement of retinal blood flow in normal Chinese American subjects by Doppler Fourier-domain optical coherence tomography
      PURPOSE: To measure total retinal blood flow (TRBF) in normal, healthy Chinese-Americans using semi-automated analysis of Doppler Fourier-domain optical coherence tomography (FD-OCT) scans. METHODS: Two hundred sixty-six normal, healthy Chinese-American participants (266 eyes) were enrolled from The Chinese American Eye Study (CHES). All participants underwent complete ophthalmic examination, including best-corrected visual acuity, indirect ophthalmoscopy and Doppler FD-OCT imaging, using the circumpapillary double circular scan protocol. TRBF and other vascular parameters ...
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  2. About Rohit Varma

    Rohit Varma

    Rohit Varma is at the Keck School of Medicine of USC announced it has named one of its own, Rohit Varma, M.D., M.P.H., to become chair of the Department of Ophthalmology and director of the USC Eye Institute as well as to serve as professor of ophthalmology and preventive medicine and hold the Grace and Emery Beardsley Chair in Ophthalmology. Varma, who is currently chair of the Department of Ophthalmology and Visual Sciences at the Illinois Eye and Ear Infirmary at the University of Illinois at Chicago College of Medicine, returns to Keck School of Medicine where he previously served as professor of ophthalmology and director of the glaucoma service, ocular epidemiology center and clinical trials unit. An accomplished physician/scientist, Varma is recognized worldwide as a visionary leader in the epidemiology of eye diseases. Among his many significant contributions to the field, Varma has been a funded researcher for the past 20 years by the National Eye Institute, part of the National Institutes of Health (NIH). He is the principal investigator of the Los Angeles Latino Eye Study (LALES), Multi-Ethnic Pediatric Eye Diseases Study (MEPEDS), African-American Eye Disease Study and the Chinese-American Eye Study in addition to his studies on blindness and vision impairment for the World Health Organization. Varma’s experience with national and international organizations will aid in his additional role as associate dean for strategic planning and community network development with the Keck School of Medicine of USC to expand the eye care network.

  3. Quotes

    1. I am extremely pleased to welcome the new faculty hires, and it is my privilege to lead this extraordinary group going forward.
      In USC Eye Institute Adds 12 Faculty Physician Scientists in 2014