TITLE

Clinical measurement and categorization of optic disc in glaucoma patients

AUTHOR(S)
Rao, Harsha B. L.; Sekhar, G. C.; Babu, Ganesh J.; Parikh, Rajul S.
PUB. DATE
November 2009
SOURCE
Indian Journal of Ophthalmology;Nov2009, Vol. 57 Issue 5, p361
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background: Assessment of optic disc size is an important component of optic nerve head examination. Agreement between different methods of disc size measurements is not very good. Purpose: To assess the agreement between the disc size assessed by Heidelberg retina tomograph (HRT) and stereobiomicroscopy with a 90 diopter (D) lens. To report the clinical (measured by biomicroscopy) disc diameters of small, average and large optic discs categorized by HRT disc areas. Setting and Design: Observational study of subjects examined in the glaucoma clinic of a tertiary eye institute. Materials and Methods: Seventy-five eyes of 75 glaucoma subjects were studied. Disc diameter was measured using stereobiomicroscopy and HRT. The agreement between the two sets of measurements was assessed by intraclass correlation coefficient (ICC). Discs were classified into small (<1.6 mm2), average (1.6-2.6 mm2) and large (>2.6 mm2) depending on cutoffs provided by the manufacturers of HRT. The means (95% CI) of the corresponding vertical disc diameter in these groups were assessed. Statistical Analysis: ICC, Bland and Altman plots. Results: ICC for measurements of clinical and HRT horizontal disc diameter was 0.518 and for vertical disc diameter measurement was 0.487. The mean difference between the clinical and HRT measurements as analyzed by the Bland and Altman plot was 0.17 (95% CI, 0.13- 0.47) for horizontal and 0.22 (95% CI, 0.11- 0.54) for vertical disc diameter. Of the 75 eyes, 3 eyes had small discs, 54 average and 18 large discs. The mean clinical vertical disc diameter for small discs was 1.55 mm (95% CI, 1.2-1.7), for average discs was 1.91 mm (95% CI, 1.87-1.96) and for large discs was 2.15 mm (95% CI, 2.03-2.27). Conclusion: The agreement between clinical and HRT disc diameter measurements is moderate. Disc diameter measurement on stereobiomicroscopy can be used to categorize discs into small, average and large discs.
ACCESSION #
44058231

 

Related Articles

  • Analysis of Optic Disc Change Using the Heidelberg Retina Tomograph in an Acquired Pit of the Optic Nerve. Joo Youn Oh; Ki Ho Park // Ophthalmic Surgery, Lasers & Imaging;Jul/Aug2004, Vol. 35 Issue 4, p325 

    A 51-year-old woman diagnosed as having normal-tension glaucoma developed an acquired pit of the optic nerve. The optic disc was viewed by the Heidelberg Retina Tomograph (HRT; Heidelberg Engineering, Heidelberg, Germany) before and after development of an acquired pit of the optic nerve. HRT...

  • TOMOGRAFIA ÃŽN COERENŢĂ OPTICÄ‚ ÃŽN MANAGEMENTULUI GLAUCOMULUI. Mihu, Diana; Stănilă, Adriana; Botezan, Andreea // Acta Medica Transilvanica;dec2011, Vol. 2 Issue 4, p41 

    Glaucoma is a characteristic optic neuropathy which associates high intra-ocular pressure, loss of visual field and structural changes of the optic disc and the peripapillary area. Optical coherence tomography (OCT) is an imagistic method of investigation that is non-invasive and repeatable. It...

  • Determining glaucoma progression can be tricky task. Charters, Lynda; Chauhan, Balwantray // Ophthalmology Times;8/1/2006, Vol. 31 Issue 15, p36 

    The article reports that researchers at Dalhousie University and the Univeristy of Manchester have established the criteria for optic disc progression in patients with glaucoma. The researchers have determined that a depth change of approximately 50µm and the size of change are important...

  • Shedding Light on a Pale Optic Nerve. Sowka, Joseph W. // Review of Optometry;11/15/2011, Vol. 148 Issue 11, p28 

    The article differentiates glaucomatous nerves from atrophic nerves. It discusses how to identify optic disc pallor and describes various causes of optic atrophy. It considers alternative causes of optic disc pallor of a patient to find out the best management strategy. It suggests that the main...

  • Membrane tissue on the optic disc may causemacular schisis associated with a glaucomatousoptic disc without optic disc pits. Saori Takashina; Wataru Saito; Kousuke Noda; Maki Katai; Susumu Ishida // Clinical Ophthalmology;May2013, Vol. 7, p883 

    This article reports a case of possible involvement of membrane tissue on the optic disc with macular schisis formation associated with glaucomatous optic disc without optic disc pits. A 78-year-old man presented with loss of central visual acuity of the left eye. He had a medical history of...

  • Membrane tissue on the optic disc may causemacular schisis associated with a glaucomatousoptic disc without optic disc pits. Saori Takashina; Wataru Saito; Kousuke Noda; Maki Katai; Susumu Ishida // Clinical Ophthalmology;May2013, Vol. 7, p883 

    This article reports a case of possible involvement of membrane tissue on the optic disc with macular schisis formation associated with glaucomatous optic disc without optic disc pits. A 78-year-old man presented with loss of central visual acuity of the left eye. He had a medical history of...

  • Effect of Media Opacity on Retinal Nerve Fiber Layer Thickness Measurements by Optical Coherence Tomography. Dae Woong Lee; Joon Mo Kim; Ki Ho Park; Chul Young Choi; Jung Gon Cho // Journal of Ophthalmic & Vision Research;Jul2010, Vol. 5 Issue 3, p151 

    Purpose: To assess the effect of ocular media opacity on retinal nerve fiber layer (RNFL) thickness measurements by optical coherence tomography (OCT). Methods: In this prospective, non-randomized clinical study, ocular examinations and OCT measurements were performed on 77 cataract patients, 80...

  • Imaging devices facilitate early detection of glaucoma. Groves, Nancy; Medeiros, Felipe A. // Ophthalmology Times;9/1/2006, Vol. 31 Issue 17, p28 

    The article highlights the benefits and applications of imaging devices in facilitating the early detection of glaucoma. The three most-widely used technologies for objective evaluation of the optic disc and nerve fiber layer include the confocal scanning laser ophthalmoscope, a scanning laser...

  • Managing NTG: Strategies for Success. Tanna, Angelo P. // Review of Ophthalmology;Feb2009 Part 1 of 3, Vol. 16 Issue 2, p70 

    The article presents several strategies that will help ophthalmologists to efficiently manage patients from normal-tension glaucoma (NTG). These include examining the anterior chamber angle and optic nerve for high intraocular pressure, utilizing imaging systems, and making a firm decision on...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics