System for quantifying the formation stages of corneal arcus

Aulia Nasution; Sally Fahdarina; Deny I. Cahya

doi:10.1117/12.2195903

29 July 2015 System for quantifying the formation stages of corneal arcus

Aulia Nasution, Sally Fahdarina, Deny I. Cahya

Proceedings Volume 9659, International Conference on Photonics Solutions 2015; 96590M (2015) https://doi.org/10.1117/12.2195903
Event: International Conference on Photonics Solutions 2015, 2015, Hua Hin, Thailand

Abstract

Extensive research on interpreting the clinical signs of corneal-arcus formation and their related diagnostics potentials have found that there is a strong correlation of the arcus formation with the risk of coronary artery diseases and lipid stratification. Clinically the stages of the arcus formation are normally observed as separate grey-whitish arcs, that are formed at the inferior and then at the superior poles of the cornea. These arcs will by time being elongated to form a ring approximately 1 mm in width. In this paper, efforts to develop quantification system that is capable to recognize the stages of the arcus formation will be reported. The quantification was based on eye-images taken using prior developed low-cost digital image acquisition system, which self constructed from a plastic safety welding-goggle that was modified by placing two Logitec C525 webcam and LEDs lighting system. Pattern images of arcs with variation of arc's positions, lengths and thickness were used for pre-calibration purposes. Then these similar arcs are drawn on the of periphery of cornea images to simulate dummy corneal arcus, which mimick the stages of corneal arcus development. Using 672 data images, results of recognition show a good recognition rate, i.e. 93.6 % for determining arc's length (with maximum %RSD of 5.67 %) and 84.83 % for determining arc's thickness (with maximum %RSD of 5.67 %). Worser precision data were observed to happen for the small arc's length as well as small arc's thickness. Current efforts are devoted to translate the system for clinical trials.

Citation Download Citation

Aulia Nasution, Sally Fahdarina, and Deny I. Cahya "System for quantifying the formation stages of corneal arcus", Proc. SPIE 9659, International Conference on Photonics Solutions 2015, 96590M (29 July 2015); https://doi.org/10.1117/12.2195903

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