scholarly journals Photodynamic Therapy with Verteporfin for Chronic Central Serous Chorioretinopathy: A Review of Data and Efficacy

2020 ◽  
Vol 13 (11) ◽  
pp. 349
Author(s):  
Pierluigi Iacono ◽  
Stefano Da Pozzo ◽  
Monica Varano ◽  
Mariacristina Parravano
Keyword(s):  
Photodynamic Therapy ◽  
Central Serous Chorioretinopathy ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Serous Retinal Detachment ◽  
Subretinal Fluid ◽  
Chronic Central Serous Chorioretinopathy ◽  
Long Time ◽  
Potential Damage ◽  
Retinal Disorder

Central serous chorioretinopathy represents the fourth most frequent retinal disorder, occurring especially in young age. Central serous chorioretinopathy is mainly characterized by macular serous retinal detachment and although the clinical course moves frequently toward a spontaneous resolution, the subretinal fluid may persist for a long time, thus evolving to the chronic form, and leading to a potential damage of the retinal pigment epithelium and to photoreceptors. The photodynamic therapy with verteporfin plays an important role in the armamentarium among the many therapeutic options employed in this complex retinal disorder. In this review, the authors aim to summarize data of efficacy and safety of PDT focusing especially on mechanisms of action of the PDT and providing comparative outcomes with the alternative therapeutic approaches, including especially the subthreshold laser treatment.

scholarly journals Outcome of half-dose photodynamic therapy in chronic central serous chorioretinopathy with fovea-involving atrophy

2020 ◽  
Author(s):  
Thomas J. van Rijssen ◽  
Elon H. C. van Dijk ◽  
Paula Scholz ◽  
Robert E. MacLaren ◽  
Sascha Fauser ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Central Serous Chorioretinopathy ◽  
Multimodal Imaging ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Final Visit ◽  
Chronic Central Serous Chorioretinopathy ◽  
Half Dose ◽  
Rpe Atrophy ◽  
The Mean

Abstract Purpose To evaluate the clinical outcomes after half-dose photodynamic therapy (PDT) in chronic central serous chorioretinopathy (cCSC) patients with pre-existent fovea-involving atrophy. Methods In this retrospective study, cCSC patients who had a window defect of the retinal pigment epithelium (RPE) on fluorescein angiography (FA), compatible with RPE atrophy, prior to half-dose PDT were included. Results Thirty-four cCSC eyes with typical findings of cCSC on multimodal imaging, and fovea-involving RPE atrophy on FA, were included. At the first visit after PDT (at a median of 1.8 months after half-dose PDT), 20 eyes (59%) had a complete resolution of SRF (p < 0.001), while this was the case in 19 eyes (56%) at final visit (median of 11.3 months after half-dose PDT; p < 0.001). The mean BCVA in Early Treatment of Diabetic Retinopathy Study letters was 71. 2 ± 15.9 at last visit before PDT, which increased to 74.1 ± 14.1 at first visit after PDT (p = 0.093, compared with baseline), and changed to 73.0 ± 19.1 at final visit (p = 0.392, compared with baseline). Both at first visit after PDT and at final visit, a significant decrease in subfoveal choroidal thickness was observed (p = 0.032 and p = 0.004, respectively). Conclusions Half-dose PDT in cCSC patients with pre-existing fovea-involving atrophy may lead to anatomical changes, but not to functional improvements. Ideally, cCSC should be treated with half-dose PDT before the occurrence of such atrophy.

Chronic Central Serous Chorioretinopathy; Signs, Diagnosis and Treatment

2020 ◽  
pp. 104-111
Keyword(s):  
Central Serous Chorioretinopathy ◽  
Pigment Epithelium ◽  
Fundus Autofluorescence ◽  
Retinal Pigment ◽  
Subretinal Fluid ◽  
Fluid Accumulation ◽  
Fundus Fluorescein Angiography ◽  
Blurred Vision ◽  
Chronic Central Serous Chorioretinopathy

Central serous chorioretinopathy (CSCR) is a maculopathy characterized by the separation of the neurosensory layer as a result of fluid accumulation between the retinal pigment epithelium (RPE) and the photoreceptor layer. Classically it is classified as acute and chronic forms. When the disease lasts longer than 4-6 months, it is called a chronic form and comprises 15% of all CSCR cases. Although the exact etiology is unknown; studies emphasize changes in choroidal circulation causing choroidal ischemia and vascular hyperpermeability as well as subretinal fluid accumulation due to deterioration pump function of RPEs. Subretinal fluid accumulation can lead to photoreceptor dysfunction and loss of vision. Classical findings in patients are a decrease in visual acuity, blurred vision, metamorphopsia, micropsia, disturbance in color vision and dark adaptation, and scotomas. Diagnosis and follow-up depend on fundoscopy as well as imaging. Optical coherent tomography is the primary method. Fundus autofluorescence (FAF) is useful in defining RPE changes noninvasively. Fundus fluorescein angiography (FFA) shows the source of leakage. In recurrent, unresolved and chronic cases, OCT, FAF, FFA, and indocyanine green angiography can be used all together to manage the disease, to follow-up its extension, and to diagnose possible neovascular as well as polypoidal component. For the treatment of chronic CSCR patients, besides medical treatments such as carbonic anhydrase inhibitors, mineralocorticoid receptor, and glucocorticoid antagonists and intravitreal vascular endothelial growth factor antagonist (Anti-VEGF) injections, half-dose photodynamic therapy and subthreshold micropulse laser treatment are used. Prospective, controlled trials with large series for the treatment of chronic CSCR warranted.

scholarly journals The morphology of choroidal neovascularization in chronic central serous chorioretinopathy presenting with flat, irregular pigment epithelium detachment

2021 ◽  
Author(s):  
Claudio Azzolini ◽  
Jennifer Cattaneo ◽  
Laura Premoli ◽  
Cristian Metrangolo ◽  
Maurizio Chiaravalli ◽  
...  
Keyword(s):  
Choroidal Neovascularization ◽  
Central Serous Chorioretinopathy ◽  
Multimodal Imaging ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Morphological Characteristics ◽  
Subretinal Fluid ◽  
Chronic Central Serous Chorioretinopathy ◽  
Cross Sectional ◽  
Pigment Epithelium Detachment

Abstract Purpose To evaluate morphological characteristics of choroidal neovascularization in chronic central serous chorioretinopathy (CSC) presenting with flat and irregular pigment epithelium detachment (FIPED) by means of innovative multimodal imaging. Methods In this observational cross-sectional study, we examined 10 consecutive patients affected by chronic CSC and FIPED using fluorescein angiography (FA), indocyanine-green angiography (ICGA) and optical coherence tomography angiography (OCTA). A qualitative analysis of the nature and characteristics of neovascular membrane was performed, combining available multimodal imaging and literature data. Results Multiple areas of retinal pigment epithelium alterations, macular hypo- and hyperpigmentation and atrophic areas were identified. Spectral domain OCT (SD-OCT) showed subretinal fluid in 80% of eyes and the ‘double layer sign’ in all patients. Late FA phases showed staining areas without leakage in all eyes; ICGA showed a hyperfluorescent plaque with surrounding hypofluorescence in 80% of patients. OCTA detected characteristic neovascular networks in the outer retina within the FIPEDs, classified as filamentous vessels with a pruned tree-like pattern in five eyes and a tangled pattern in three eyes. The choriocapillaris network showed dark areas in 80% of eyes and diffuse dark spots in all eyes. Conclusion Multimodal imaging completes clinical characterization of FIPEDs in chronic CSC. This study using OCTA technology describes the phenotype of hidden neovascular lesions in shape and morphology.

scholarly journals Efficacy of oral rifampicin in chronic central serous chorioretinopathy

2018 ◽  
Vol 10 ◽  
pp. 251584141880713 ◽  
Author(s):  
Ramesh Venkatesh ◽  
Manisha Agarwal ◽  
Meha Kantha
Keyword(s):  
Visual Acuity ◽  
Fluorescein Angiography ◽  
Central Serous Chorioretinopathy ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Subretinal Fluid ◽  
Fundus Fluorescein Angiography ◽  
Chronic Central Serous Chorioretinopathy ◽  
Duration Of Symptoms ◽  
Diffuse Retinal Pigment Epitheliopathy

Objective: To evaluate the role of oral rifampicin in the management of chronic central serous chorioretinopathy. Methods: Retrospective analysis of patients diagnosed with chronic central serous chorioretinopathy (duration >3 months) and treated with oral rifampicin 600 mg daily for a maximum period of 3 months was carried out. Baseline visual acuity, fundus fluorescein angiography, and optical coherence tomography were recorded and the patients were followed up. Resolution of subretinal fluid and improvement in visual acuity were the main outcome measures. Recurrence of subretinal fluid was noted. Any adverse reaction to the drug was monitored. Results: Nine eyes of eight patients were included in the study. The average age of the patients was 41.90 years (range 32–52 years). Mean duration of symptoms was 16 months (range 3–60 months). Mean duration of follow-up was 10.11 months (range 3–33 months). Fluorescein angiography showed four eyes with subfoveal leaks and five eyes with diffuse retinal pigment epitheliopathy. Complete resolution of subretinal fluid was achieved in four of the nine eyes – two patients at the end of 1 month, one patient each at the end of 2 and 3 months, respectively. Visual acuity improvement was noted in four of the nine eyes. Three patients had one-line improvement and one patient had a two-line visual improvement. None of the patients had severe adverse events for which the drug had to be discontinued. None of the patients had recurrence of subretinal fluid after the discontinuation of the drug. Conclusion: Oral rifampicin could provide a useful, effective, and cost-effective alternative for treatment of patients with chronic central serous choroidopathy and evidence of healthier retinal pigment epithelium, those with focal leakage. It was not effective in eyes with diffuse retinal pigment epitheliopathy.

Pharmacotherapy of Central Serous Chorioretinopathy: A Review of the Current Treatments

2019 ◽  
Vol 24 (41) ◽  
pp. 4864-4873 ◽  
Author(s):  
Pierluigi Iacono ◽  
Lisa Toto ◽  
Eliana Costanzo ◽  
Monica Varano ◽  
Maria Cristina Parravano
Keyword(s):  
Laser Treatment ◽  
Central Serous Chorioretinopathy ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Serous Retinal Detachment ◽  
Subretinal Fluid ◽  
Standard Of Care ◽  
Current Evidence ◽  
Young Subjects ◽  
Multiple Relapse

Background: Central serous chorioretinopathy (CSC) is the fourth most frequent retinal disorder in terms of prevalence. It typically occurs in young subjects and affects men more often than women. CSC is characterized by serous retinal detachment (SRD) involving mainly the macular area. The clinical course is usually selflimited, with spontaneous resolution within 3 months. The persistence of SRD or multiple relapse may result in a chronic form of CSC distinguished by permanent retinal pigment epithelium (RPE) and photoreceptor damage. As the pathogenetic mechanism of CSC primarily involves RPE and choroidal vascularization, the current therapeutic approaches aim to restore the normal functions of RPE and normal choroidal vascular permeability. In this review, the authors aim to summarize the current therapeutic approach to CSC. Methods: A comprehensive review of the literature was conducted in PubMed by searching for relevant studies on the current therapeutic options for CSC, including simple observation, conventional laser treatment, subthreshold laser treatment (SLT), photodynamic therapy (PDT) with verteporfin, treatment with mineralocorticoid receptor (MR) antagonists and treatment with anti-vascular endothelial growth factor drugs. Results: Since most cases resolve spontaneously, the most common initial CSC treatment is observation. Current evidence suggests that PDT and SLT are valuable in improving visual acuity, reducing subretinal fluid and maintaining long-term effectiveness. No clear evidence of efficacy has been achieved for anti-VEGF. MR antagonists might be a viable choice for the treatment of chronic CSC. Conclusion: The pathophysiology of CSC remains poorly understood and as a consequence, the gold standard of care for CSC is yet to be defined. To date, PDT and SLT continue to offer good clinical outcomes. Positive preliminary results seem to emerge from the studies of MR antagonists.

scholarly journals The Role of Imaging in Planning Treatment for Central Serous Chorioretinopathy

2021 ◽  
Vol 14 (2) ◽  
pp. 105
Author(s):  
Stefano Da Pozzo ◽  
Pierluigi Iacono ◽  
Alessandro Arrigo ◽  
Maurizio Battaglia Parodi
Keyword(s):  
Central Serous Chorioretinopathy ◽  
Therapeutic Strategy ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Subretinal Fluid ◽  
Subretinal Space ◽  
Planning Treatment ◽  
Multiple Biomarkers ◽  
Effective Procedures

Central serous chorioretinopathy (CSC) is a controversial disease both in terms of clinical classification and choice of therapeutic strategy. Choroidal layers, retinal pigment epithelium (RPE), photoreceptors, and retina are involved to varying degrees. Beyond well-known symptoms raising the clinical suspect of CSC and slit-lamp fundus examination, multimodal imaging plays a key role in assessing the extent of chorioretinal structural involvement. Subretinal fluid (SRF) originating from the choroid leaks through one or multiple RPE defects and spreads into the subretinal space. Spontaneous fluid reabsorption is quite common, but in some eyes, resolution can be obtained only after treatment. Multiple therapeutic strategies are available, and extensive research identified the most effective procedures. Imaging has carved a significant role in guiding the choice of the most appropriate strategy for each single CSC eye. Multiple biomarkers have been identified, and all of them represent a diagnostic and prognostic reference point. This review aims to provide an updated and comprehensive analysis of the current scientific knowledge about the role of imaging in planning the treatment in eyes affected by CSC.

scholarly journals Spectral OCT-Angiography in En Face Mode for Detection of Morphological Changes in the Retinal Pigment Epithelium before and after Selective Micro-Pulse Laser Exposure in Patients with Central Serous Chorioretinopathy

2019 ◽  
Vol 16 (2) ◽  
pp. 192-201
Author(s):  
P. L. Volodin ◽  
E. V. Ivanova ◽  
E. Iu. Polyakova ◽  
A. V. Fomin
Keyword(s):  
Retinal Pigment Epithelium ◽  
Central Serous Chorioretinopathy ◽  
Morphological Changes ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Laser System ◽  
Subretinal Fluid ◽  
Micropulse Laser ◽  
En Face ◽  
Before And After

Purpose — to study the morphological changes of the retinal pigment epithelium (RPE) by optical coherence tomography-angiography (OCT-A) in En Face mode before and after selective micropulse laser irradiation in patients with central serous chorioretinopathy (CSC), determine the correspondence between the topographic location of RPE defects and detachment on the OCT-angiogram in En Face mode and points of leakage on the FAG.Patients and methods. There were 20 patients (21 eyes) with CSC before and after laser treatment under the observation. All patients underwent high-resolution FAG and OCT-A using Angio Retina 2×2 or 3×3 mm protocol and Angio Retina HD 6×6 mm. The treatment was carried out in a selective micropulse mode with individual selection of parameters using the Navilas 577s navigation laser system (OD-OS, Germany) or the IQ 577 laser system (IRIDEX, USA).Results were evaluated at 2 weeks and 1 month after treatment. Results. In all cases, the leaking points of the subretinal fluid on FAG corresponded to the topographic location of defects and detachments of RPE detachment on OKT-A En Face. According to OCT-A En Face, the following morphological changes were revealed: in 5 cases — single defects of RPE, in 7 cases — multiple defects of RPE, in 9 cases of slit-like detachment of RPE, in 3 patients a combination of slit-like detachment and defect RPE. The sizes of RPE defects varied in the range from 21 to 159 microns, while their rounded shape prevailed. 1 month after the selective micropulse laser effect on OCT-A in the En Face mode, the defects were closed and the RPE detachments fit in all patients, which resulted in resorption of the subretinal fluid and the neurosensory retina attachment.Findings. OCT-A in En Face mode is a highly informative diagnostic method that allows noninvasive detection of morphological changes in RPE with a clear topographic localization relative to the retinal vascular network, as well as evaluating the effectiveness of selective micropulse laser treatment in patients with CSC. 

scholarly journals Central Serous Chorioretinopathy Induced by Work Stress: A Case Report

e-CliniC ◽  
2020 ◽  
Vol 8 (2) ◽  
Author(s):  
Ade J. Nursalim ◽  
Vera Sumual
Keyword(s):  
Risk Factors ◽  
Work Stress ◽  
Central Serous Chorioretinopathy ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Subretinal Fluid ◽  
Blurred Vision ◽  
Reading Text ◽  
Neurosensory Retinal Detachment ◽  
The Right

Abstrak: Central serous chorioretinopathy (CSC) adalah terkumpulnya cairan serosa di bawah lapisan epitel pigmen retina yang mengakibatkan terlepasnya retina neurosensorik (detachment). Keadaan ini dapat disebabkan oleh berbagai faktor risiko, termasuk stres psikologik. Jenis kelamin laki-laki merupakan salah satu faktor risiko CSC. Terapi kondisi psikologik merupakan pena-nganan utama CSC yang diinduksi oleh stres kerja. Kami melaporkan seorang laki-laki berusia 27 tahun yang datang ke Poliklinik Mata RSUP Prof. Dr. R. D. Kandou Hospital dengan keluhan kekaburan mata kanan yang mendadak sejak seminggu lalu tanpa didahului oleh nyeri pada mata. Pasien juga mengalami kesulitan dalam membaca teks dan mengenali wajah bila hanya menggunakan mata kanannya. Pasien telah pergi ke optik tetapi tidak mendapatkan ukuran kacamata yang sesuai. Pasien bekerja sebagai tenaga administrasi dan akhir-akhir ini mendapatkan beban kerja berlebihan. Pasien mengakui bahwa ia mengalami kesulitan dalam mengatur aktivitasnya, dan merasakan kelelahan sepanjang hari serta kehilangan minat kerja. Hasil pemeriksaan mata mendapatkan visus 6/15 untuk mata kanan dan visus 6/6 untuk mata kiri, dan metamorphopsia sedangkan hasil pemeriksaan oftalmoskopi memperlihatkan adanya edema dengan lingkaran kekuningan dan berbatas tidak jelas pada mata kanan. Pemeriksaan lanjut dengan OCT menunjukkan adanya cairan subretinal pada mata kanan disertai terlepasnya lapisan epitel pigmen. Saat kontrol setelah 36 hari, visus mata kanan telah membaik 6/6F2 dan peme-riksaan OCT menunjukkan penurunan tebal makula dari 289 μm pada kunjugan pertama men-jadi 190 μm, serta tidak tampak adanya cairan subretinal. Simpulan kasus ini ialah central serous chorioretinopathy yang diinduksi oleh stres kerja, dengan penanganan utama ialah terapi psikologik untuk memperbaiki kualitas hidup.Kata kunci: central serous chorioretinopathy (CSC), stres kerja Abstract: Central serous chorioretinopathy (CSC) is a condition where serous fluid builds up in the retinal pigment epithelium layer which causes neurosensory retinal detachment. This condition is affected by many risk factors, including psychological stress. Male gender is one of the risk factors for CSC. Treatment to the patient's psychological condition can be the main therapy in handling CSC induced by work stress. We reported a 27-year-old male came to the eye clinic at Prof. dr. R. D. Kandou Hospital complaining of sudden blurred vision in his right eye a week ago without initial pain in the eye. The patient also experienced difficulty in reading text and recognizing people’s face using the right eye. The patient went to an optic store but he did not find suitable glasses. The patient works as an administrative employee and is currently getting a heavy workload at his workplace. The patient admitted that he had issues in managing his life in a day. Patients felt tired throughout the day and had no interest in making any activities. The results of the eye examination showed vision 6/15 in the right eye and 6/6 in the left eye, metamorphopsia, edema with a yellowish circle with an unclear border on the right eye using ophthalmoscopy examination, and a subretinal fluid image in the patient's right eye with epithelial detachment pigment acquired through the examination with OCT. After 36 days from the first visit, the right eye vision was improved to 6/6 F2 and OCT examination resulted in a decrease in macula thickness from 289 μm at the first visit to 190 μm, and there was no subretinal fluid. In conclusion, this was a CSC case induced by work stress, and the main treatment was psychological therapy in order to improve the quality of life (QoL).Keywords: central serous chorioretinopathy (CSC), work stress

scholarly journals Long-Term Effect of Half-Fluence Photodynamic Therapy on Fundus Autofluorescence in Acute Central Serous Chorioretinopathy

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Martin Stattin ◽  
Stefan Hagen ◽  
Daniel Ahmed ◽  
Eva Smretschnig ◽  
Florian Frommlet ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Central Serous Chorioretinopathy ◽  
Pigment Epithelium ◽  
Fundus Autofluorescence ◽  
Retinal Pigment ◽  
Long Term Follow Up ◽  
Acute Central Serous Chorioretinopathy ◽  
Mean Differences

Purpose. To evaluate normalized short-wavelength fundus autofluorescence (SW-FAF) imaging changes over time as a predictive parameter for the retinal pigment epithelium (RPE) function in eyes compromised by acute central serous chorioretinopathy (CSCR) after indocyanine green angiography-guided verteporfin (Visudyne®, Novartis Pharma, Basel, Switzerland) photodynamic therapy (PDT) with a half-fluence rate (25 J/cm2). Methods. Quantitative data of SW-FAF grey values (SW-FAF GV) from a 350 μm (SW-350) and 1200 μm (SW-1200) diameter circle centered on the fovea and normalized with the level of SW-FAF GV in a 30° image of 20 eyes in 11 patients initially treated for unilateral acute symptomatic CSCR were collected and retrospectively analyzed after 7 years. A 2-sided t-test was calculated to explore the differences of SW-350 and SW-1200 between one month and the long-term follow-up. Results. Mean differences (95% CI) in SW-FAF GV between 1 month and 7 years after half-fluence PDT were 0.07 ± 0.11 for SW-350 ([95% CI: −0.002; 0.14], p=0.06) and 0.11 ± 0.15 for SW-1200 ([95% CI: 0.01; 0.21], p=0.03). Mean differences in SW-FAF GV of the contralateral untreated eye were 0.06 ± 0.14 for SW-350 ([95% CI: −0.04; 0.17], p=0.22) and 0.05 ± 0.13 for SW-1200 ([95% CI: −0.04; 0.15], p=0.22). Conclusion. After 7 years, normalized SW-FAF GV were significantly lower in eyes with resolved acute CSCR treated with reduced-fluence PDT compared to the follow-up after 1 month without correlation to explicit pattern changes or structural damages. Half-fluence PDT remains a safe and considerable treatment option in acute CSCR.

Optimal fluence rate of photodynamic therapy for chronic central serous chorioretinopathy

2020 ◽  
pp. bjophthalmol-2020-316837
Author(s):  
Dong-Geun Park ◽  
Seongyong Jeong ◽  
Donghyoun Noh ◽  
Min Sagong
Keyword(s):  
Photodynamic Therapy ◽  
Recurrence Rate ◽  
Central Serous Chorioretinopathy ◽  
Subretinal Fluid ◽  
High Rate ◽  
Rank Test ◽  
Retinal Layer ◽  
Fluence Rate ◽  
Foveal Thickness ◽  
Chronic Central Serous Chorioretinopathy

AimsTo investigate the lowest effective fluence rate of photodynamic therapy (PDT) for treating chronic central serous chorioretinopathy (CSC).MethodsFifty-one eyes of 51 patients with chronic CSC were randomly treated with 30% (n=15), 40% (n=16) or 50% (n=17) of the standard-fluence rate of PDT and followed up for 12 months. The success rate, recurrence rate, mean best-corrected visual acuity (BCVA), central foveal thickness (CFT), subfoveal choroidal thickness (SFCT), integrity of the outer retinal layer and complications were evaluated at baseline and at the follow-up periods after PDT.ResultsThe rate of complete subretinal fluid (SRF) resolution in the 30%-fluence, 40%-fluence and 50%-fluence groups was 60.0%, 81.2% and 100.0%, respectively, at 3 months (p=0.009), and 80.0%, 94.0% and 100.0%, respectively, at 12 months (p=0.06). The recurrence rate in the 50%-fluence group was lower than that in the 30%- and 40%-fluence groups at 12 months (30% vs 50%, 40% vs 50%; p=0.002, p=0.030, respectively (log-rank test)). The mean BCVA improved significantly 12 months after PDT only in the 40%- and 50%-fluence groups (p=0.005, p=0.003, respectively). Mean CFT and SFCT decreased significantly at 12 months in the three groups. The rate of complications did not differ significantly among the three groups.ConclusionsA 50%-fluence rate of PDT seems to be the most effective for treating chronic CSC, considering the low recurrence rate and high rate of complete SRF resolution, compared with other low-fluence PDT.Trial registration numberNCT01630863.

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