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Incidence of Primary Open-Angle Glaucoma at the Flamboyants Communal Medical Center of Conakry, Guinea

Open Journal of Ophthalmology 2022年第3期12卷 233-241页

作者： Pierre Louis Lama aly sylla Sidikiba Camara Céougna Sagno Oumar Raphiou Diallo Ibrahima Sory Souaré National Noncommunicable Diseases Programme Conakry Guinea FSTS Gamal Abdel Nasser University of Conakry Conakry Guinea Department of Ophthalmology Regional Hospital of N’Zerekore Zerekore Guinea Department of Neurosurgery Sino Guinean Friendship Hospital Conakry Guinea

Background: Primary Open-Angle Glaucoma (POAG) is a chronic, progressive optic neuropathy of multifactorial origin defined by alterations in the visual field, progressive loss of optic nerve fibers and ganglion cells, and an open iridocorneal angle in gonioscopy. It is the world’s leading cause of irreversible blindness. There is no epidemiological study in Guinea that allows us to locate the real level of the problem. The objective of this study is to determine the hospital incidence of POAG at the Centre Médical Communal (CMC) in the Flamboyants. Patients and Method: This was a descriptive cross-sectional study with a prospective collection for one year, from April 1, 2020 to March 31, 2021, in patients aged at least 40 years, received in consultation at the CMC in the Flamboyants. The diagnostic criterion for a new case of glaucoma was the presence in a patient of the following two signs: (excavation of the optical disc C/D ≥ 0.5 and alteration of the visual field) with an open angle at least stage 4 of the Shaffer and Etienne classification associated or not with ocular hypertonia and having never received anti glaucoma treatment. We described variables related to sociodemographic characteristics, visual acuity, intraocular pressures, papillary excavations, and visual field surveys. Informed consent from patients was sought and obtained. The confidentiality of the files was guaranteed. Results: 68 new cases of POAG were diagnosed out of 3220 consultations, an incidence rate of 2.11%. The average age was 58.2 years (10.64 with a male predominance of 63.23%. A family history of glaucoma was present in 11.36% of cases. Visual acuity was poor Conclusion: This study has shown us that POAG in our environment is relatively common, early onset, and rapidly evolving. The implementation of a rapid and reliable screening strategy by the Eye Health Program will make it possible to manage glaucoma from the earliest stages.

关键词： Primary Glaucoma Open-Angle Incidence Conakry Guinea

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Functional Results without Correction of Cataract Surgery during a Free Campaign at Siguiri Prefectural Hospital in Guinea

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Open Journal of Ophthalmology 2022年第3期12卷 259-268页

作者： Pierre Louis Lama Céougna Sagno aly sylla Sidikiba Camara Balla Sovogui Niouma Alexis Ouendeno Oumar Raphiou Diallo National Eye Health Programme Conakry Guinea FSTS Gamal Abdel Nasser University of Conakry Conakry Guinea Department of Ophthalmology Regional Hospital of N’Zerekore Zerekore Guinea

Background: Cataract is the leading cause of blindness in the world and its treatment is exclusively surgical. However, the results of cataract surgery are not always as good as is assumed and this aspect of surgical services needs a lot of attention. The purpose of this study is to evaluate the functional results of the free cataract surgery campaign carried out at the Siguiri Prefectural Hospital in Guinea. Patients and Method: This was a descriptive and retrospective cross-sectional study over a period of three months (1 October-31 December 2017). Records of cataract-operated patients during the study period were reviewed. The complete files for the main variables sought were retained. Sociodemographic data and visual acuity without pre- and post-operative correction were assessed. Functional outcomes were analysed according to WHO guidelines and recommendations for post-operative functional outcomes of cataract surgery. The data was collected and processed using Excel version 2010 software. Results: A total of 108 eyes from 102 patients were the subject of this present study on 314 eyes from 289 operated patients. 64 (%) men and 38 women (%) had a follow-up of 6 weeks after cataract surgery, a sex ratio of 1.68 in favor of women. The average age was 62.45 ± 15.20 years with extremes of 25 and 90 years. The age group from 60 to 69 years is the most represented with 46 cases or 45.45%. Housewives and farmers are the most represented strata with 42 cases (41.18%) and 31 cases (30.39%) respectively. The operative technique was Phaco A in 4/5 of the cases. No implant calculations were performed. Functional results indicate that 66% of patients had good visual acuity (≥3/10);29% of patients had borderline visual acuity (between 1/10 and 2/10) and 13.30% had poor visual acuity (Conclusion: The importance of the rate of poor results in our study should draw our attention to the conduct of free cataract surgery campaigns. The problem of cataract blindness is often compou

关键词： Cataract Surgery Functional Results Campaign Siguiri Guinea

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Pediatric Eye Trauma: Epidemiological, Clinical and Therapeutic Aspects at CADESSO in Donka, Guinea

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Open Journal of Ophthalmology 2022年第3期12卷 284-293页

作者： Pierre Louis Lama Céougna Sagno Ibrahima Fofana aly sylla Sidikiba Camara Balla Sovogui Ismael Maomou Oumar Raphiou Diallo National Programme of Non-Communicable Diseases Conakry Guinea FSTS Gamal Abdel Nasser University of Conakry Conakry Guinea Department of Ophthalmology Regional Hospital of N’Zerekore Zerekore Guinea Army Health Service Ministry of Defence Conakry Guinea Department of Ophthalmology Prefectoral Hospital of Macenta Macenta Guinea

Introduction: Eye trauma represents all morbid lesions on the eyeball due to external violence. In children, they are an important cause of morbidity and the leading cause of monocular blindness. The aim of this study was to determine the sociodemographic, clinical and therapeutic characteristics of eye trauma in children aged 0 to 16 at the Application Centre for the Diploma of Specialized Higher Studies in Ophthalmology (CADESSO) in Donka, Guinea. Patients and Method: This was a prospective longitudinal study with descriptive purposes from January 1 to December 31, 2019 involving 205 children victims of eye trauma. Variables related to sociodemographic, clinical and therapeutic characteristics were studied. Informed consent from patients and/or their parents was sought and obtained. The confidentiality of the files was guaranteed. The data entry was done on EPI-Info version 7 and the analysis using the Stata software. The tables were made in Excel 2010. Pearson’s Chi2 test was used for the comparison of proportions. Results: Pediatric eye trauma accounted for 9.31% of pediatric visits and 30.92% of all eye trauma cases. There was a male predominance with a sex ratio of 1.59. Age groups from 0 - 4 years;5 - 8 years and 9 - 12 were the most affected with 26.8%, 28.8% and 27.3% respectively and a decrease in the number of cases in the 13 - 16 age group (17.1%). Gambling and sports accidents accounted for 33.2%, followed by domestic accidents for 16.6% and physical injury for 8.2%. Eye contusion was the most represented at 66.3% followed by wounds of the globe 23.9% and burns at 5.9%. One hundred and twenty-six patients had received a determination of visual acuity (VA) at admission;99 were assessed at discharge and 27 were lost to follow-up. The VA ≥ 5/10th increased from 43.4% at admission to 79.8% after treatment. We had found 67% of vision ≥ 5/10 in eye bruises against 5% in eyeball wounds. Anti-inflammatories (99.5%)) were almost used. The sequelae wer

关键词： Eye Trauma Pediatric CADESSO

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Secondary Stress Induced Central Serous Chorioretinopathy in Bamako: Report of Two Cases

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Open Journal of Ophthalmology 2020年第4期10卷 268-275页

作者： Rodrigue Romuald Elien Gagnan Yan Zaou Tou Adama Guindo Mahamat Adam Dicko Mohamed Kole Sidibe aly sylla Modibo Diarra Mohamed Inoussa Lamine Abdoulaye Nagnan Chieck Rahim Diabate Hamadoun Diallo Institute of African Tropical Ophthalmology University of Sciences and Technology of Bamako Bamako Mali

Introduction: Idiopathic central serous chorioretinopathy (ICSC) is characterized by the buildup of fluid leading to circumscribed elevation of the retina within the posterior pole. This condition affects young people between the ages of 20 - 50 years. The disease is seen predominantly in men as compared to women. We report the cases of two (02) patients received in consultation at IOTA-Teaching Hospital between July 2019 and February 2020. Case Presentation: We report two cases of Idiopathic stress central serous chorioretinopathy. The first case is a 37-year-old man that we received in consultation for visual acuity decrease from a sudden installation for 1 hour. The clinical and paraclinical arguments permitted us to retain the diagnosis of Idiopathic stress central serous chorioretinopathy. The patient benefited from laser treatment and the clinical evolution was good. The second case is a 42-year-old man, who consulted for a sudden reduction of visual acuity that had been evolving for 3 weeks. The clinical and paraclinical contexts were in favour of the diagnosis of Idiopathic stress central serous chorioretinopathy. The patient was treated with spironolactone. The clinical evolution was favourable. Conclusion: Our study confirms the existence of central serous chorioretinopathy (CSC) in Black African patients. Studies show the connection between CSC and stress.

关键词： Stress Central Serous Chorioretinopathy Fluorescein Angiography Bamako

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Systematic Review on the Epidemiology and Management of the Dry Eye Disease in Sub-Saharan Francophone Africa

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Open Journal of Ophthalmology 2020年第4期10卷 323-331页

作者： Rodrigue Romuald Elien Gagnan Yan-zaou-tou Guirou Nouhoum Bakayoko Seydou Dicko Mahamat Adam Sissoko Modibo Sidibé Mohamed Kolé Mbaïkoua Jean Michel Mananu Innocent Adubango Hann T. Fadimé sylla aly Diabaté Nagnan Cheick Rahim Diarra Modibo Institute of Tropical Ophthalmology of Africa-Teaching Hospital (CHU-IOTA) Bamako Mali National University Hospital Center of Bangui-Teaching Hospital (CNHUB) Bangui Central African Republic National Reference-Teaching Hospital (CHU-RN) N’Djamena Republic of Chad Evangelical Medical Center of Nyankunde-Bunia Bunia Democratic Republic of Congo Donka University Hospital Center Donka Republic of Guinea Medical and Surgical Center of the Army Conackry Republic of Guinea

Introduction: Dry Eye Disease (DED) is a multifactorial affection of the tears and the ocular surface. Its prevalence in the world varies between 7% and 33%. To the best of our knowledge, the prevalence of DED in Subsaharan Francophone African countries is not yet known. The objectives of this systematic review were to determine the prevalence of DED, to identify the main risk factors for DED, and to determine the diagnostic and therapeutic management of DED in Subsaharan Francophone African countries. Methodology: This is a systematic review of articles, dealing with DED, published in English or French language from 2010 to 2020. The following key words (Prevalence OR Incidence OR Proportion OR Rate OR Frequency OR Epidemiology OR Distribution) AND (Risk Factors OR Influences) AND (Symptoms or Questionnaire) AND (Clinical Signs OR Clinical Tests) AND (Dry Eye Disease OR Dry Eye Syndrome) AND (Pharmacological Treatment OR Non-pharmacological Treatment OR Management) AND (Benin OR Burkina Faso OR Burundi OR Cameroon OR Cap-Green OR Central African Republic OR Congo OR Congo (Democratic Republic of) OR Ivory Coast OR Gabon OR Guinea OR Guinea-Bissau OR Equatorial Guinea OR Mali OR Madagascar OR Mauritius (island) OR Niger OR Rwanda OR Sao Tome and Principe OR Senegal OR Seychelles OR Chad OR Togo) in French and English were searched on Pubmed, Chocrane database, Google scholar and ICTRP. Articles in English and French were selected from 2010 to 2020. Results: We selected 05 articles on the epidemiology and management of D

关键词： Dry Eye Disease (DED) Epidemiology Diagnosis Treatment Sub-Saharan Francophone Africa

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Incidence of Primary Open-Angle Glaucoma at the Flamboyants Communal Medical Center of Conakry, Guinea

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Open Journal of Ophthalmology 2022年第3期

作者： pierre louis lama aly sylla sidikiba camara céougna sagno oumar raphiou diallo ibrahima sory souaré

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Functional Results without Correction of Cataract Surgery during a Free Campaign at Siguiri Prefectural Hospital in Guinea

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Open Journal of Ophthalmology 2022年第3期

作者： pierre louis lama céougna sagno aly sylla sidikiba camara balla sovogui niouma alexis ouendeno oumar raphiou diallo

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Pediatric Eye Trauma: Epidemiological, Clinical and Therapeutic Aspects at CADESSO in Donka,Guinea

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Open Journal of Ophthalmology 2022年第3期

作者： pierre louis lama céougna sagno ibrahima fofana aly sylla sidikiba camara balla sovogui ismael maomou oumar raphiou diallo

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REFLECTED BACKWARD STOCHASTIC DIFFERENTIAL EQUATION WITH JUMPS AND VISCOSITY SOLUTION OF SECOND ORDER INTEGRO-DIFFERENTIAL EQUATION WITHOUT MONOTONICITY CONDITION: CASE WITH THE MEASURE OF LéVY INFINITE

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Acta Mathematica Scientia 2019年第3期39卷 819-844页

作者： Lamine sylla Université Gaston Berger

We consider the problem of viscosity solution of integro-partial differential equation( IPDE in short) with one obstacle via the solution of reflected backward stochastic dif ferential equations(RBSDE in short) with jumps. We show the existence and uniqueness of a continuous viscosity solution of equation with non local terms, if the generator is not monotonous and Levy's measure is infinite.

关键词： Integro-partial differential equation reflected stochastic differential equations with jumps viscosity solution non-local operator

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A Novel Three-Staged Generative Model for Skeletonizing Chinese Characters with Versatile Styles

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Journal of Computer Science & Technology 2023年第6期38卷 1250-1271页

作者：田业川徐颂华 Cheickna sylla School of Mathematics and Statistics Xi’an Jiaotong UniversityXi’an 710000China Martin Tuchman School of Management New Jersey Institute of TechnologyNewark 07101U.S.A.

Skeletons of characters provide vital information to support a variety of tasks,e.g.,optical character recogni-tion,image restoration,stroke segmentation and extraction,and style learning and ***,automatically skele-tonizing Chinese characters poses a steep computational challenge due to the large volume of Chinese characters and their versatile styles,for which traditional image analysis approaches are error-prone and *** deep learning based approach requires a heavy amount of manual labeling efforts,which imposes serious limitations on the precision,robust-ness,scalability and generalizability of an algorithm to solve a specific *** tackle the above challenge,this paper introduces a novel three-staged deep generative model developed as an image-to-image translation approach,which signifi-cantly reduces the model's demand for labeled training *** new model is built upon an improved G-net,an en-hanced X-net,and a newly proposed *** compellingly demonstrated by comprehensive experimental results,the new model is able to iteratively extract skeletons of Chinese characters in versatile styles with a high quality,which noticeably outperforms two state-of-the-art peer deep learning methods and a classical thinning algorithm in terms of F-measure,Hausdorff distance,and average Hausdorff distance.

关键词： skeletonization of characters three-staged skeletonization X-net

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