Changes in Anterior Segment Morphology after Laser Peripheral Iridotomy: An Anterior Segment Optical Coherence Tomography Study
Purpose Novel anterior segment optical coherence tomography (ASOCT) parameters associated with angle closure include anterior chamber area (ACA), anterior chamber volume (ACV), anterior chamber width (ACW), lens vault (LV), iris thickness (IT), iris area (I-area), and iris curvature (I-curv). We aim...
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| Veröffentlicht in: | Ophthalmology (Rochester, Minn.) Minn.), 2012-07, Vol.119 (7), p.1383-1387 |
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| creator | How, Alicia C., FRCS(Ed) Baskaran, Mani, DNB Kumar, Rajesh S., MS He, Mingguang, MD, PhD Foster, Paul J., MD, PhD Lavanya, Raghavan, DO Wong, Hon-Tym, FRCS(Ed) Chew, Paul T.K., FRCS(Ed) Friedman, David S., MD, MPH Aung, Tin, PhD, FRCS(Ed) |
| description | Purpose Novel anterior segment optical coherence tomography (ASOCT) parameters associated with angle closure include anterior chamber area (ACA), anterior chamber volume (ACV), anterior chamber width (ACW), lens vault (LV), iris thickness (IT), iris area (I-area), and iris curvature (I-curv). We aimed to investigate changes in these parameters after laser peripheral iridotomy (LPI) in a cohort of primary angle-closure suspects (PACS). Design Prospective observational study. Participants and Controls A total of 176 PACS aged ≥50 years who underwent LPI in 1 eye. Methods We analyzed ASOCT images (Visante, Carl Zeiss Meditec, Dublin, CA) from all subjects using customized software before and 1 week after LPI. Multivariate linear regression analysis was performed for predictors of percentage change in mean angle opening distance (AOD750). Main Outcome Measures Change in ASOCT parameters after LPI. Results The mean age of participants was 63±7.3 years. The majority of subjects were Chinese (95.5%) and women (76.7%). Mean angle width (modified Shaffer grade) changed from 0.68±0.54 at baseline to 1.76±0.69 after LPI ( P |
| doi_str_mv | 10.1016/j.ophtha.2012.01.019 |
| format | Article |
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We aimed to investigate changes in these parameters after laser peripheral iridotomy (LPI) in a cohort of primary angle-closure suspects (PACS). Design Prospective observational study. Participants and Controls A total of 176 PACS aged ≥50 years who underwent LPI in 1 eye. Methods We analyzed ASOCT images (Visante, Carl Zeiss Meditec, Dublin, CA) from all subjects using customized software before and 1 week after LPI. Multivariate linear regression analysis was performed for predictors of percentage change in mean angle opening distance (AOD750). Main Outcome Measures Change in ASOCT parameters after LPI. Results The mean age of participants was 63±7.3 years. The majority of subjects were Chinese (95.5%) and women (76.7%). Mean angle width (modified Shaffer grade) changed from 0.68±0.54 at baseline to 1.76±0.69 after LPI ( P <0.001) with a corresponding increase in mean AOD500 (0.12 vs. 0.19 mm, P <0.001), trabecular iris surface area (TISA500, 0.06 vs. 0.08 mm2 , P <0.001), and angle recess area (ARA, 0.13 vs. 0.17 mm2 , P <0.001). Mean ACA (15.0 vs. 16.0 mm2 , P <0.001) and ACV (91.6 vs. 103.0 mm3 , P <0.001) increased significantly after LPI, but there was no change in ACW, anterior chamber depth (ACD), or LV. Mean I-curv was reduced (0.375 vs. 0.18 mm, P <0.001) after LPI, but there was no significant change in IT or I-area. After multivariate analysis, mean LV (β = 0.286, P = 0.001), mean IT at 2000 μm (IT2000, β = 0.172, P = 0.034), and intraocular pressure (β = 0.159, P = 0.042) at baseline were found to be associated with ΔAOD750. Conclusions This study confirms that LPI results in a significant increase in the angle width in PACS. The ACA and ACV increased after LPI, but there was no change in ACD, ACW, LV, IT, or I-area. The increase in ACA/ACV was mainly due to decreased I-curv after LPI. Financial Disclosure(s) The author(s) have no proprietary or commercial interest in any materials discussed in this article.]]></description><identifier>ISSN: 0161-6420</identifier><identifier>EISSN: 1549-4713</identifier><identifier>DOI: 10.1016/j.ophtha.2012.01.019</identifier><identifier>PMID: 22410350</identifier><identifier>CODEN: OPHTDG</identifier><language>eng</language><publisher>New York, NY: Elsevier Inc</publisher><subject>Anterior Eye Segment - pathology ; Biological and medical sciences ; Female ; Glaucoma, Angle-Closure - physiopathology ; Glaucoma, Angle-Closure - prevention & control ; Gonioscopy ; Humans ; Intraocular Pressure - physiology ; Iridectomy ; Iris - surgery ; Laser Therapy ; Lasers, Solid-State - therapeutic use ; Male ; Medical sciences ; Middle Aged ; Miscellaneous ; Ophthalmology ; Prospective Studies ; Tomography, Optical Coherence ; Visual Acuity - physiology ; Visual Fields - physiology</subject><ispartof>Ophthalmology (Rochester, Minn.), 2012-07, Vol.119 (7), p.1383-1387</ispartof><rights>American Academy of Ophthalmology</rights><rights>2012 American Academy of Ophthalmology</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © 2012 American Academy of Ophthalmology. Published by Elsevier Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c513t-67bd3330f0eca1fe07c48a103c62162b5a59a6d50f0884071aa8dabc693ea64b3</citedby><cites>FETCH-LOGICAL-c513t-67bd3330f0eca1fe07c48a103c62162b5a59a6d50f0884071aa8dabc693ea64b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0161642012000449$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,65309</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26068469$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22410350$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>How, Alicia C., FRCS(Ed)</creatorcontrib><creatorcontrib>Baskaran, Mani, DNB</creatorcontrib><creatorcontrib>Kumar, Rajesh S., MS</creatorcontrib><creatorcontrib>He, Mingguang, MD, PhD</creatorcontrib><creatorcontrib>Foster, Paul J., MD, PhD</creatorcontrib><creatorcontrib>Lavanya, Raghavan, DO</creatorcontrib><creatorcontrib>Wong, Hon-Tym, FRCS(Ed)</creatorcontrib><creatorcontrib>Chew, Paul T.K., FRCS(Ed)</creatorcontrib><creatorcontrib>Friedman, David S., MD, MPH</creatorcontrib><creatorcontrib>Aung, Tin, PhD, FRCS(Ed)</creatorcontrib><title>Changes in Anterior Segment Morphology after Laser Peripheral Iridotomy: An Anterior Segment Optical Coherence Tomography Study</title><title>Ophthalmology (Rochester, Minn.)</title><addtitle>Ophthalmology</addtitle><description><![CDATA[Purpose Novel anterior segment optical coherence tomography (ASOCT) parameters associated with angle closure include anterior chamber area (ACA), anterior chamber volume (ACV), anterior chamber width (ACW), lens vault (LV), iris thickness (IT), iris area (I-area), and iris curvature (I-curv). We aimed to investigate changes in these parameters after laser peripheral iridotomy (LPI) in a cohort of primary angle-closure suspects (PACS). Design Prospective observational study. Participants and Controls A total of 176 PACS aged ≥50 years who underwent LPI in 1 eye. Methods We analyzed ASOCT images (Visante, Carl Zeiss Meditec, Dublin, CA) from all subjects using customized software before and 1 week after LPI. Multivariate linear regression analysis was performed for predictors of percentage change in mean angle opening distance (AOD750). Main Outcome Measures Change in ASOCT parameters after LPI. Results The mean age of participants was 63±7.3 years. The majority of subjects were Chinese (95.5%) and women (76.7%). Mean angle width (modified Shaffer grade) changed from 0.68±0.54 at baseline to 1.76±0.69 after LPI ( P <0.001) with a corresponding increase in mean AOD500 (0.12 vs. 0.19 mm, P <0.001), trabecular iris surface area (TISA500, 0.06 vs. 0.08 mm2 , P <0.001), and angle recess area (ARA, 0.13 vs. 0.17 mm2 , P <0.001). Mean ACA (15.0 vs. 16.0 mm2 , P <0.001) and ACV (91.6 vs. 103.0 mm3 , P <0.001) increased significantly after LPI, but there was no change in ACW, anterior chamber depth (ACD), or LV. Mean I-curv was reduced (0.375 vs. 0.18 mm, P <0.001) after LPI, but there was no significant change in IT or I-area. After multivariate analysis, mean LV (β = 0.286, P = 0.001), mean IT at 2000 μm (IT2000, β = 0.172, P = 0.034), and intraocular pressure (β = 0.159, P = 0.042) at baseline were found to be associated with ΔAOD750. Conclusions This study confirms that LPI results in a significant increase in the angle width in PACS. The ACA and ACV increased after LPI, but there was no change in ACD, ACW, LV, IT, or I-area. The increase in ACA/ACV was mainly due to decreased I-curv after LPI. Financial Disclosure(s) The author(s) have no proprietary or commercial interest in any materials discussed in this article.]]></description><subject>Anterior Eye Segment - pathology</subject><subject>Biological and medical sciences</subject><subject>Female</subject><subject>Glaucoma, Angle-Closure - physiopathology</subject><subject>Glaucoma, Angle-Closure - prevention & control</subject><subject>Gonioscopy</subject><subject>Humans</subject><subject>Intraocular Pressure - physiology</subject><subject>Iridectomy</subject><subject>Iris - surgery</subject><subject>Laser Therapy</subject><subject>Lasers, Solid-State - therapeutic use</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Middle Aged</subject><subject>Miscellaneous</subject><subject>Ophthalmology</subject><subject>Prospective Studies</subject><subject>Tomography, Optical Coherence</subject><subject>Visual Acuity - physiology</subject><subject>Visual Fields - physiology</subject><issn>0161-6420</issn><issn>1549-4713</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkl2L1DAUhoO4uOPqPxDpjeBNZ_PVTOuFsAx-LMyywqzXIU1Ppxnbpiat0Cv_uqfMqKAXCyG5yPOeJE8OIa8YXTPK1PVx7YdmbMyaU8bXlOEonpAVy2SRyg0TT8kKMZYqyekleR7jkVKqlJDPyCXnklGR0RX5uW1Mf4CYuD656UcIzodkD4cO-jG582FofOsPc2Jq3Et2JuL8BamhgWDa5Da4yo--m99h-v8C98PoLGJbjzj0FpIH3_lDMEMzJ_txquYX5KI2bYSX5_WKfP344WH7Od3df7rd3uxSmzExpmpTVkIIWlOwhtVAN1bmBt9gFWeKl5nJCqOqDIE8l3TDjMkrU1pVCDBKluKKvD3VHYL_PkEcdeeihbY1Pfgpaka54IXIZY6oPKE2-BgD1HoIrjNhRkgv6vVRn9TrRb2mDEeBsdfnE6ayg-pP6LdrBN6cARNRSh1Mb138yymqcqmWQu9PHKCPHw6CjtYt8ioXwI668u6xm_xbwLauXz7iG8wQj34KPbrWTEfM6P3SJkuXMI4dImUhfgHh8LnP</recordid><startdate>20120701</startdate><enddate>20120701</enddate><creator>How, Alicia C., FRCS(Ed)</creator><creator>Baskaran, Mani, DNB</creator><creator>Kumar, Rajesh S., MS</creator><creator>He, Mingguang, MD, PhD</creator><creator>Foster, Paul J., MD, PhD</creator><creator>Lavanya, Raghavan, DO</creator><creator>Wong, Hon-Tym, FRCS(Ed)</creator><creator>Chew, Paul T.K., FRCS(Ed)</creator><creator>Friedman, David S., MD, MPH</creator><creator>Aung, Tin, PhD, FRCS(Ed)</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20120701</creationdate><title>Changes in Anterior Segment Morphology after Laser Peripheral Iridotomy: An Anterior Segment Optical Coherence Tomography Study</title><author>How, Alicia C., FRCS(Ed) ; Baskaran, Mani, DNB ; Kumar, Rajesh S., MS ; He, Mingguang, MD, PhD ; Foster, Paul J., MD, PhD ; Lavanya, Raghavan, DO ; Wong, Hon-Tym, FRCS(Ed) ; Chew, Paul T.K., FRCS(Ed) ; Friedman, David S., MD, MPH ; Aung, Tin, PhD, FRCS(Ed)</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c513t-67bd3330f0eca1fe07c48a103c62162b5a59a6d50f0884071aa8dabc693ea64b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Anterior Eye Segment - pathology</topic><topic>Biological and medical sciences</topic><topic>Female</topic><topic>Glaucoma, Angle-Closure - physiopathology</topic><topic>Glaucoma, Angle-Closure - prevention & control</topic><topic>Gonioscopy</topic><topic>Humans</topic><topic>Intraocular Pressure - physiology</topic><topic>Iridectomy</topic><topic>Iris - surgery</topic><topic>Laser Therapy</topic><topic>Lasers, Solid-State - therapeutic use</topic><topic>Male</topic><topic>Medical sciences</topic><topic>Middle Aged</topic><topic>Miscellaneous</topic><topic>Ophthalmology</topic><topic>Prospective Studies</topic><topic>Tomography, Optical Coherence</topic><topic>Visual Acuity - physiology</topic><topic>Visual Fields - physiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>How, Alicia C., FRCS(Ed)</creatorcontrib><creatorcontrib>Baskaran, Mani, DNB</creatorcontrib><creatorcontrib>Kumar, Rajesh S., MS</creatorcontrib><creatorcontrib>He, Mingguang, MD, PhD</creatorcontrib><creatorcontrib>Foster, Paul J., MD, PhD</creatorcontrib><creatorcontrib>Lavanya, Raghavan, DO</creatorcontrib><creatorcontrib>Wong, Hon-Tym, FRCS(Ed)</creatorcontrib><creatorcontrib>Chew, Paul T.K., FRCS(Ed)</creatorcontrib><creatorcontrib>Friedman, David S., MD, MPH</creatorcontrib><creatorcontrib>Aung, Tin, PhD, FRCS(Ed)</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Ophthalmology (Rochester, Minn.)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>How, Alicia C., FRCS(Ed)</au><au>Baskaran, Mani, DNB</au><au>Kumar, Rajesh S., MS</au><au>He, Mingguang, MD, PhD</au><au>Foster, Paul J., MD, PhD</au><au>Lavanya, Raghavan, DO</au><au>Wong, Hon-Tym, FRCS(Ed)</au><au>Chew, Paul T.K., FRCS(Ed)</au><au>Friedman, David S., MD, MPH</au><au>Aung, Tin, PhD, FRCS(Ed)</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Changes in Anterior Segment Morphology after Laser Peripheral Iridotomy: An Anterior Segment Optical Coherence Tomography Study</atitle><jtitle>Ophthalmology (Rochester, Minn.)</jtitle><addtitle>Ophthalmology</addtitle><date>2012-07-01</date><risdate>2012</risdate><volume>119</volume><issue>7</issue><spage>1383</spage><epage>1387</epage><pages>1383-1387</pages><issn>0161-6420</issn><eissn>1549-4713</eissn><coden>OPHTDG</coden><abstract><![CDATA[Purpose Novel anterior segment optical coherence tomography (ASOCT) parameters associated with angle closure include anterior chamber area (ACA), anterior chamber volume (ACV), anterior chamber width (ACW), lens vault (LV), iris thickness (IT), iris area (I-area), and iris curvature (I-curv). We aimed to investigate changes in these parameters after laser peripheral iridotomy (LPI) in a cohort of primary angle-closure suspects (PACS). Design Prospective observational study. Participants and Controls A total of 176 PACS aged ≥50 years who underwent LPI in 1 eye. Methods We analyzed ASOCT images (Visante, Carl Zeiss Meditec, Dublin, CA) from all subjects using customized software before and 1 week after LPI. Multivariate linear regression analysis was performed for predictors of percentage change in mean angle opening distance (AOD750). Main Outcome Measures Change in ASOCT parameters after LPI. Results The mean age of participants was 63±7.3 years. The majority of subjects were Chinese (95.5%) and women (76.7%). Mean angle width (modified Shaffer grade) changed from 0.68±0.54 at baseline to 1.76±0.69 after LPI ( P <0.001) with a corresponding increase in mean AOD500 (0.12 vs. 0.19 mm, P <0.001), trabecular iris surface area (TISA500, 0.06 vs. 0.08 mm2 , P <0.001), and angle recess area (ARA, 0.13 vs. 0.17 mm2 , P <0.001). Mean ACA (15.0 vs. 16.0 mm2 , P <0.001) and ACV (91.6 vs. 103.0 mm3 , P <0.001) increased significantly after LPI, but there was no change in ACW, anterior chamber depth (ACD), or LV. Mean I-curv was reduced (0.375 vs. 0.18 mm, P <0.001) after LPI, but there was no significant change in IT or I-area. After multivariate analysis, mean LV (β = 0.286, P = 0.001), mean IT at 2000 μm (IT2000, β = 0.172, P = 0.034), and intraocular pressure (β = 0.159, P = 0.042) at baseline were found to be associated with ΔAOD750. Conclusions This study confirms that LPI results in a significant increase in the angle width in PACS. The ACA and ACV increased after LPI, but there was no change in ACD, ACW, LV, IT, or I-area. The increase in ACA/ACV was mainly due to decreased I-curv after LPI. Financial Disclosure(s) The author(s) have no proprietary or commercial interest in any materials discussed in this article.]]></abstract><cop>New York, NY</cop><pub>Elsevier Inc</pub><pmid>22410350</pmid><doi>10.1016/j.ophtha.2012.01.019</doi><tpages>5</tpages></addata></record> |
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| identifier | ISSN: 0161-6420 |
| ispartof | Ophthalmology (Rochester, Minn.), 2012-07, Vol.119 (7), p.1383-1387 |
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| subjects | Anterior Eye Segment - pathology Biological and medical sciences Female Glaucoma, Angle-Closure - physiopathology Glaucoma, Angle-Closure - prevention & control Gonioscopy Humans Intraocular Pressure - physiology Iridectomy Iris - surgery Laser Therapy Lasers, Solid-State - therapeutic use Male Medical sciences Middle Aged Miscellaneous Ophthalmology Prospective Studies Tomography, Optical Coherence Visual Acuity - physiology Visual Fields - physiology |
| title | Changes in Anterior Segment Morphology after Laser Peripheral Iridotomy: An Anterior Segment Optical Coherence Tomography Study |
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