532-nm Subthreshold Micropulse Laser for the Treatment of Chronic Central Serous Retinopathy
Keissy Sousa,1 Gil Calvão-Santos,1 Marina João,2 Nuno Gomes,1 Manuel Falcão3,4 1Retina Department of Hospital de Braga, Braga, Portugal; 2Ophthalmology Department of Hospital de Braga, Braga, Portugal; 3Retina Department of Centro Hospitalar Universitário...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Dove Medical Press
2020-02-01
|
| Series: | Clinical Ophthalmology |
| Subjects: | |
| Online Access: | https://www.dovepress.com/532-nm-subthreshold-micropulse-laser-for-the-treatment-of-chronic-cent-peer-reviewed-article-OPTH |
| _version_ | 1818425828129636352 |
|---|---|
| author | Sousa K Calvão-Santos G João M Gomes N Falcão M |
| author_facet | Sousa K Calvão-Santos G João M Gomes N Falcão M |
| author_sort | Sousa K |
| collection | DOAJ |
| description | Keissy Sousa,1 Gil Calvão-Santos,1 Marina João,2 Nuno Gomes,1 Manuel Falcão3,4 1Retina Department of Hospital de Braga, Braga, Portugal; 2Ophthalmology Department of Hospital de Braga, Braga, Portugal; 3Retina Department of Centro Hospitalar Universitário S. João, Porto, Portugal; 4Department of Surgery and Physiology of Faculty of Medicine of the University of Porto, Porto, PortugalCorrespondence: Manuel FalcãoOftalmologia, Centro Hospitalar S. João, Alameda Prof. Hernâni Monteiro, Porto 4200-319, PortugalTel +351 22 551 2100Email falcao@med.up.ptIntroduction: Subthreshold micropulse laser treatment with a 532 nm (532-SML) wavelength has been suggested as a treatment option for the treatment of chronic central serous retinopathy (cCSR). The objective is to present its effects and complications.Methods: We present a retrospective cohort study of cCSR patients submitted to 532-SML. Best-corrected visual acuity (BCVA) and spectral-domain optical coherence tomography (SD-OCT) parameters – central macular thickness, subfoveal outer nuclear layer, external limiting membrane, ellipsoid band, interdigitation band, subretinal fluid and choroidal thickness – were evaluated before and 12 weeks after treatment. A power of 50%, a duty cycle of 5%, exposure time of 200 ms and a spot size of 160 μm were the applied laser parameters.Results: We included 26 eyes. Overall there were no significant changes in visual acuity (median 0.20 (IQR 0) logMAR before and after treatment) or SD-OCT parameters. However, visual benefits occurred in 42.3% (n=11) of the patients and in half of the cases, subretinal fluid was completely reabsorbed. There were no complications.Conclusion: In this study, 532-SML was overall ineffective on cCSR as it did not lead to significant changes in the overall median visual acuity and SD-OCT parameters. However, some patients may have benefited functionally and anatomically from the treatment; further investigation is necessary to understand the potential of 532-SML.Keywords: central serous retinopathy, SD-OCT, subthreshold micropulse laser, 532 nm wavelength, outer retina bands |
| first_indexed | 2024-12-14T14:20:08Z |
| format | Article |
| id | doaj.art-dfe6e0d45791477d85cc4c8181c6048c |
| institution | Directory Open Access Journal |
| issn | 1177-5483 |
| language | English |
| last_indexed | 2024-12-14T14:20:08Z |
| publishDate | 2020-02-01 |
| publisher | Dove Medical Press |
| record_format | Article |
| series | Clinical Ophthalmology |
| spelling | doaj.art-dfe6e0d45791477d85cc4c8181c6048c2022-12-21T22:58:05ZengDove Medical PressClinical Ophthalmology1177-54832020-02-01Volume 1452553152052532-nm Subthreshold Micropulse Laser for the Treatment of Chronic Central Serous RetinopathySousa KCalvão-Santos GJoão MGomes NFalcão MKeissy Sousa,1 Gil Calvão-Santos,1 Marina João,2 Nuno Gomes,1 Manuel Falcão3,4 1Retina Department of Hospital de Braga, Braga, Portugal; 2Ophthalmology Department of Hospital de Braga, Braga, Portugal; 3Retina Department of Centro Hospitalar Universitário S. João, Porto, Portugal; 4Department of Surgery and Physiology of Faculty of Medicine of the University of Porto, Porto, PortugalCorrespondence: Manuel FalcãoOftalmologia, Centro Hospitalar S. João, Alameda Prof. Hernâni Monteiro, Porto 4200-319, PortugalTel +351 22 551 2100Email falcao@med.up.ptIntroduction: Subthreshold micropulse laser treatment with a 532 nm (532-SML) wavelength has been suggested as a treatment option for the treatment of chronic central serous retinopathy (cCSR). The objective is to present its effects and complications.Methods: We present a retrospective cohort study of cCSR patients submitted to 532-SML. Best-corrected visual acuity (BCVA) and spectral-domain optical coherence tomography (SD-OCT) parameters – central macular thickness, subfoveal outer nuclear layer, external limiting membrane, ellipsoid band, interdigitation band, subretinal fluid and choroidal thickness – were evaluated before and 12 weeks after treatment. A power of 50%, a duty cycle of 5%, exposure time of 200 ms and a spot size of 160 μm were the applied laser parameters.Results: We included 26 eyes. Overall there were no significant changes in visual acuity (median 0.20 (IQR 0) logMAR before and after treatment) or SD-OCT parameters. However, visual benefits occurred in 42.3% (n=11) of the patients and in half of the cases, subretinal fluid was completely reabsorbed. There were no complications.Conclusion: In this study, 532-SML was overall ineffective on cCSR as it did not lead to significant changes in the overall median visual acuity and SD-OCT parameters. However, some patients may have benefited functionally and anatomically from the treatment; further investigation is necessary to understand the potential of 532-SML.Keywords: central serous retinopathy, SD-OCT, subthreshold micropulse laser, 532 nm wavelength, outer retina bandshttps://www.dovepress.com/532-nm-subthreshold-micropulse-laser-for-the-treatment-of-chronic-cent-peer-reviewed-article-OPTHcentral serous retinopathysd-octsubthreshold micropulse laser532 nm wavelengthouter retina bands |
| spellingShingle | Sousa K Calvão-Santos G João M Gomes N Falcão M 532-nm Subthreshold Micropulse Laser for the Treatment of Chronic Central Serous Retinopathy Clinical Ophthalmology central serous retinopathy sd-oct subthreshold micropulse laser 532 nm wavelength outer retina bands |
| title | 532-nm Subthreshold Micropulse Laser for the Treatment of Chronic Central Serous Retinopathy |
| title_full | 532-nm Subthreshold Micropulse Laser for the Treatment of Chronic Central Serous Retinopathy |
| title_fullStr | 532-nm Subthreshold Micropulse Laser for the Treatment of Chronic Central Serous Retinopathy |
| title_full_unstemmed | 532-nm Subthreshold Micropulse Laser for the Treatment of Chronic Central Serous Retinopathy |
| title_short | 532-nm Subthreshold Micropulse Laser for the Treatment of Chronic Central Serous Retinopathy |
| title_sort | 532 nm subthreshold micropulse laser for the treatment of chronic central serous retinopathy |
| topic | central serous retinopathy sd-oct subthreshold micropulse laser 532 nm wavelength outer retina bands |
| url | https://www.dovepress.com/532-nm-subthreshold-micropulse-laser-for-the-treatment-of-chronic-cent-peer-reviewed-article-OPTH |
| work_keys_str_mv | AT sousak 532nmsubthresholdmicropulselaserforthetreatmentofchroniccentralserousretinopathy AT calvaosantosg 532nmsubthresholdmicropulselaserforthetreatmentofchroniccentralserousretinopathy AT joaom 532nmsubthresholdmicropulselaserforthetreatmentofchroniccentralserousretinopathy AT gomesn 532nmsubthresholdmicropulselaserforthetreatmentofchroniccentralserousretinopathy AT falcaom 532nmsubthresholdmicropulselaserforthetreatmentofchroniccentralserousretinopathy |