NDLI: Influence of pterygium size on corneal higher-order aberration evaluated using anterior-segment optical coherence tomography

Content Provider	Springer Nature : BioMed Central
Author	Minami, Keiichiro Tokunaga, Tadatoshi Okamoto, Keiichiro Miyata, Kazunori Oshika, Tetsuro
Abstract	Background The prospective observation study aimed to evaluate changes in corneal higher-order aberrations induced by advancement of pterygium using an anterior-segment optical coherence tomography (AS-OCT) and Zernike aberration analysis. Methods The corneal topography of 284 eyes with primary pterygia originating from the nasal region was measured using an AS-OCT (SS-1000, Tomey). With anterior corneal elevation data, Zernike polynomial coefficients were calculated in diameters of 1.0, 3.0, and 5.0 mm, and the coma, spherical, coma-like, spherical-like, and total higher-order aberrations were obtained. Pterygium size was also measured as a ratio of positions of the pterygium end with respect to the corneal diameter and categorized in eight classes: less than 15%, 15–20%, 20–25%, 25–30%, 30–35%, 35–40%, 40–45, and 45% or larger. Increases in the aberrations were analyzed with reference to those in eyes with pterygium size < 15%. Results The mean age of the participants was 69.3 years, and the pterygium size ranged from 2 to 57% (mean: 28.8%). The coma aberration significantly increased when the pterygium size was 45% or larger in 1.0 and 3.0 mm diameters and over 25–30% in 5.0 mm diameter. Similar increases were found in the pterygium sizes exceeding 45, 40, and 25%, respectively, in the coma-like, spherical-like, and total higher-order aberrations. On contrast, there was no increase in the spherical aberration. Conclusion Increases in higher-order aberrations reflected the pterygium size, and significant aberrations were induced in 5.0 mm diameter when the end exceeded 25% of corneal diameter. The use of AS-OCT and Zernike analysis could enable objective grading of pterygium advancement based on changes in corneal optics.
Related Links	https://bmcophthalmol.biomedcentral.com/counter/pdf/10.1186/s12886-018-0837-8.pdf
Ending Page	7
Page Count	7
Starting Page	1
File Format	HTM / HTML
ISSN	14712415
DOI	10.1186/s12886-018-0837-8
Journal	BMC Ophthalmology
Issue Number	1
Volume Number	18
Language	English
Publisher	BioMed Central
Publisher Date	2018-07-09
Access Restriction	Open
Subject Keyword	Ophthalmology Pterygium Anterior-segment optical coherence tomography Zernike analysis Higher-order aberration
Content Type	Text
Resource Type	Article
Subject	Ophthalmology
Journal Impact Factor	1.7/2023
5-Year Journal Impact Factor	2/2023

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Anterior segment optical coherence tomography assessment of corneal thickness before and after primary pterygium surgery

Does pterygium morphology affect corneal astigmatism?

Corneal graphite deposit on anterior segment optical coherence tomography

Patency of small laser iridotomy evaluated using anterior-segment optical coherence tomography

Corneal graphite deposit on anterior segment optical coherence tomography

Efficacy of Intacs Intrastromal Corneal Ring Segment Relative to Depth of Insertion Evaluated with Anterior Segment Optical Coherence Tomography

Exclusion of Traumatic Anterior Capsule Laceration Using Anterior Segment Optical Coherence Tomography

Patency of small laser iridotomy evaluated using anterior-segment optical coherence tomography

Short-term in vivo morphological changes of amniotic membrane after fibrin glue-assisted pterygium surgery on anterior segment optical coherence tomography: a case presentation

Influence of pterygium size on corneal higher-order aberration evaluated using anterior-segment optical coherence tomography

Similar Documents

Anterior segment optical coherence tomography assessment of corneal thickness before and after primary pterygium surgery

Does pterygium morphology affect corneal astigmatism?

Corneal graphite deposit on anterior segment optical coherence tomography

Patency of small laser iridotomy evaluated using anterior-segment optical coherence tomography

Corneal graphite deposit on anterior segment optical coherence tomography

Efficacy of Intacs Intrastromal Corneal Ring Segment Relative to Depth of Insertion Evaluated with Anterior Segment Optical Coherence Tomography

Exclusion of Traumatic Anterior Capsule Laceration Using Anterior Segment Optical Coherence Tomography

Patency of small laser iridotomy evaluated using anterior-segment optical coherence tomography

Short-term in vivo morphological changes of amniotic membrane after fibrin glue-assisted pterygium surgery on anterior segment optical coherence tomography: a case presentation

Influence of pterygium size on corneal higher-order aberration evaluated using anterior-segment optical coherence tomography