title: Agreement between Gonioscopic Examination and Swept Source Fourier Domain Anterior Segment Optical Coherence Tomography Imaging.
abstract: Purpose. To evaluate interobserver, intervisit, and interinstrument agreements for gonioscopy and Fourier domain anterior segment optical coherence tomography (FD ASOCT) for classifying open and narrow angle eyes.Methods. Eighty-six eyes with open or narrow anterior chamber angles were included. The superior angle was classified open or narrow by 2 of 5 glaucoma specialists using gonioscopy and imaged by FD ASOCT in the dark. The superior angle of each FD ASOCT image was graded as open or narrow by 2 masked readers. The same procedures were repeated within 6 months. Kappas for interobserver and intervisit agreements for each instrument and interinstrument agreements were calculated.Results. The mean age was 50.9 (±18.4) years. Interobserver agreements were moderate to good for both gonioscopy (0.57 and 0.69) and FD ASOCT (0.58 and 0.75). Intervisit agreements were moderate to excellent for both gonioscopy (0.53 to 0.86) and FD ASOCT (0.57 and 0.85). Interinstrument agreements were fair to good (0.34 to 0.63), with FD ASOCT classifying more angles as narrow than gonioscopy.Conclusions. Both gonioscopy and FD ASOCT examiners were internally consistent with similar interobserver and intervisit agreements for angle classification. Agreement between instruments was fair to good, with FD ASOCT classifying more angles as narrow than gonioscopy.
authors.affiliation: Robert Cizik Eye Clinic, 6400 Fannin St., Suite 1800, Houston, TX 77030, USA.
authors.forename: Mohammed
authors.identifier: 0000-0001-9990-0989
authors.initials: M
authors.lastname: Rigi
authors.affiliation: Robert Cizik Eye Clinic, 6400 Fannin St., Suite 1800, Houston, TX 77030, USA; Ruiz Department of Ophthalmology and Visual Science, McGovern Medical School at The University of Texas Health Science Center at Houston (UTHealth), 6431 Fannin St., MSB 7.024, Houston, TX 77030, USA.
authors.forename: Nicholas P
authors.identifier: 0000-0001-7735-143X
authors.initials: NP
authors.lastname: Bell
authors.affiliation: Robert Cizik Eye Clinic, 6400 Fannin St., Suite 1800, Houston, TX 77030, USA; Ruiz Department of Ophthalmology and Visual Science, McGovern Medical School at The University of Texas Health Science Center at Houston (UTHealth), 6431 Fannin St., MSB 7.024, Houston, TX 77030, USA.
authors.forename: David A
authors.identifier: 0000-0002-4609-6453
authors.initials: DA
authors.lastname: Lee
authors.affiliation: Robert Cizik Eye Clinic, 6400 Fannin St., Suite 1800, Houston, TX 77030, USA.
authors.forename: Laura A
authors.identifier: 0000-0003-1166-9386
authors.initials: LA
authors.lastname: Baker
authors.affiliation: Ruiz Department of Ophthalmology and Visual Science, McGovern Medical School at The University of Texas Health Science Center at Houston (UTHealth), 6431 Fannin St., MSB 7.024, Houston, TX 77030, USA.
authors.forename: Alice Z
authors.identifier: 0000-0002-9373-1624
authors.initials: AZ
authors.lastname: Chuang
authors.affiliation: Robert Cizik Eye Clinic, 6400 Fannin St., Suite 1800, Houston, TX 77030, USA; Ruiz Department of Ophthalmology and Visual Science, McGovern Medical School at The University of Texas Health Science Center at Houston (UTHealth), 6431 Fannin St., MSB 7.024, Houston, TX 77030, USA.
authors.forename: Donna
authors.initials: D
authors.lastname: Nguyen
authors.affiliation: Robert Cizik Eye Clinic, 6400 Fannin St., Suite 1800, Houston, TX 77030, USA; Ruiz Department of Ophthalmology and Visual Science, McGovern Medical School at The University of Texas Health Science Center at Houston (UTHealth), 6431 Fannin St., MSB 7.024, Houston, TX 77030, USA.
authors.forename: Vandana R
authors.initials: VR
authors.lastname: Minnal
authors.affiliation: Robert Cizik Eye Clinic, 6400 Fannin St., Suite 1800, Houston, TX 77030, USA; Ruiz Department of Ophthalmology and Visual Science, McGovern Medical School at The University of Texas Health Science Center at Houston (UTHealth), 6431 Fannin St., MSB 7.024, Houston, TX 77030, USA.
authors.forename: Robert M
authors.identifier: 0000-0002-1695-4322
authors.initials: RM
authors.lastname: Feldman
authors.affiliation: Robert Cizik Eye Clinic, 6400 Fannin St., Suite 1800, Houston, TX 77030, USA; Ruiz Department of Ophthalmology and Visual Science, McGovern Medical School at The University of Texas Health Science Center at Houston (UTHealth), 6431 Fannin St., MSB 7.024, Houston, TX 77030, USA.
authors.forename: Lauren S
authors.identifier: 0000-0002-8162-4346
authors.initials: LS
authors.lastname: Blieden