Mr. S. Rohit Profile

S. Rohit

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 4 March 2022 Poster + Presentation + Paper

Is there a relationship between optic disc ovality index and positional changes in myopic eyes?

S. Rohit, Janarthanam Jothi Balaji, Vasudevan Lakshminarayanan

Proceedings Volume 11941, 119410M (2022) https://doi.org/10.1117/12.2610714

KEYWORDS: Optical coherence tomography, Image processing, Eye, Image segmentation, Visualization, Optic nerve

Read Abstract +

Optic disc tilt (ODT), increased ovality, peripapillary atrophy, and abnormally large or small optic discs are the earliest known reported changes in myopic eyes. Studies of these early changes may lead to a better understanding of the pathophysiology of myopia progression. The study aims to investigate if there is a relationship between the ODT and ovality in myopes. ODT. The ovality index was quantified in myopic eyes (n=33) and compared with 21 emmetropic eyes. The myopic OCT images were labelled based on a severity scale as low-moderate (between -0.50 D to -6.00 D SE) and high-myopia (worse than -6.00 D SE) using standard myopia classifications. From segmented OCT images of the optic nerve head, the optic disc boundary was extracted by traversing all the pixels of the image and selecting only those pixels with an intensity value lower than 30 in all 3 color channels. Then, an ellipse was fit to the extracted optic disc boundaries using an automated image processing method. From these the long and short axes of the ellipses were measured. Using this measurement ODT and ovality were calculated. Higher ODT was observed with the shorter axis in low-moderate myopic eyes 18.15 (IQR 15.83 – 23.81) and smaller ODT was observed in the high-myopic eye’s longer axis 11.83 (IQR 7.20 – 14.39). A significantly altered ovality index was observed with increase in degree of myopia.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

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:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years