Assessment of Van Herick technique by using ImageJ software

Dolores Ferreiro; Silvia García-Montero; Jacobo Garcia-Queiruga; Eva Punin Dorrio; Eva Yebra-Pimentel

doi:10.1117/12.2527375

3 October 2019 Assessment of Van Herick technique by using ImageJ software

Dolores Ferreiro, Silvia García-Montero, Jacobo Garcia-Queiruga, Eva Punin Dorrio, Eva Yebra-Pimentel

Proceedings Volume 11207, Fourth International Conference on Applications of Optics and Photonics; 112071F (2019) https://doi.org/10.1117/12.2527375
Event: IV International Conference on Applications of Optics and Photonics (AOP 2019), 2019, Lisbon, Portugal

Abstract

Purpose: Primary angle-closure glaucoma is a common cause of blindness where angle closure is a fundamental pathologic process. Van Herick technique is one of the commonest tests used in clinical settings for iridocorneal angle estimation, but training is required. With the development of imaging devices for the anterior segment of the eye, such as multi-diagnostic platform VX120 (Visionix), objective quantification of the angle can be obtained. The purpose of this study is to compare the angle estimation of Van Herick (with the aid of image processing software) with that obtained by objective VX120 platform. Material and methods: 49 subjects were enrolled in the study among patients attending the Optometry Clinic of the Optometry Faculty (USC). All of them were assessed with multi-diagnostic platform VX120 (Visionix) in order to obtain the Anterior Chamber Depth (ACD) and temporal iridocorneal angle (TA) parameters. Then, an image of the temporal optic section of the cornea (following the requirements of Van Herick technique) was obtained from each subject by using a camera attached to a slit-lamp. Finally, Van Herick’s temporal angle was determined as a ratio between the peripheral anterior chamber depth and corneal thickness (AC/SC ratio) by using ImageJ software. Results: Van Herick´s AC/SC ratio showed a significant correlation with both TA (r=0.389, p=0.006) and ACD (r=0.370, p=0.009). As expected, both VX120 parameters (ACD and TA) showed a significant correlation between them (r=0.863, p<0.001). Conclusions: Van Herick´s AC/SC by using ImageJ software supposes a valuable parameter for iridocorneal angle estimation.

Citation Download Citation

Dolores Ferreiro, Silvia García-Montero, Jacobo Garcia-Queiruga, Eva Punin Dorrio, and Eva Yebra-Pimentel "Assessment of Van Herick technique by using ImageJ software", Proc. SPIE 11207, Fourth International Conference on Applications of Optics and Photonics, 112071F (3 October 2019); https://doi.org/10.1117/12.2527375

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Statistical analysis

Cornea

Eye

Cameras

Image processing software

Image segmentation

Imaging devices

Show All Keywords

Keywords/Phrases

Search In:

Publication Years