OBJCTIVE :To investigate the fundus ocu]i changes in hypnxie isehemic encepbalnpa ally(HIE)of new[x,rns. METHODS:One hundred and two newblt;~rns suffered from HIE were investi- gated to observe lhe pathological neular fundus changes by di~et ophthabnoseopy after mydria~s. RE- SULTS:Seventy seven ca.~s(154 eyes)were found to have ophthalmoscopic changes in the ~ular fundi including papilledema .white retina vaseolar abnormality and hemorrhage. CONCLUSIONS:In clinical view .the severity of HIE depends on the pathological ebanges of the brain .and ftmdus ahnormalby will be very often in middle and .~vere sufforers of HIE.
Purpose Observation on changes of choroidal circulation in 21 cases (42 eyes) of retinal dystrophies. Methods Fundus fluorescein angiography (ICGA) were used for comparartive analyses of the retinal and choroidal blood circulation of 21 cases (42 eyes) of retinal dystrophic diseases. Results The changes of choroidal circulation,i.e.slow perfusion or filling defects were observed in four kinds of retinal dystrophies. Conclusion ICGA may assist in providing valuable informations on choroidal circulation of retinal dystrophic diseases. (Chin J Ocul Fundus Dis,1998,14:88-91)
Objective To investigate the iconographic characteristics and clinical significances of synchronic examination of indocyanine green angiography (ICGA) and fundus fluorescein angiography (FFA) for high myopia.Methods Thirty patients (57 eyes) with high myopia（gt;-6.00D）, selected randomly and consecutively, were examined by ICGA and FFA synchronically.Results The result of early phase of FFA showed hypofluorescence of the background in 25 eyes，while of late phase showed subretinal neovascularization (SRNV) in 10 eyes and streak formation in 40 eyes. The result of ICGA showed choroidal retrobulbar arteries in 8 eyes, hypofluorescence of the background in 35 eyes, SRNV in 8 eyes, and streak formation in 52 eyes.Conclusion The iconographic characteristics of ICGA and FFA of high myopia include hypofluorescence of the background, SRNV and streak formation. ICGA can givemore exact information on the lesions of choroid in high myopia. The synchronic examination of ICGA and FFA may act as a guide to the therapy for high myopia.(Chin J Ocul Fundus Dis，2003，19：87-89)
Objective To investigate the features of ocular fundus of retinal pigment epithelial detachment (PED) in Chinese patients more than 50. Methods The clinical data of 31 continuous patients (34 eyes) with PED diagnosed by ocular fundus photochromy, fundus fluorescein angiography (FFA) and indocyanine green angiography ( ICGA ) from Oct, 2001 to Aug, 2004 were analyzed retrospectively. Results In 34 eyes with PED, the results of FFA showed serous PED in 18 (52.9%), hemorrhagic PED in 8 (23.5%), and serosanguineous PED in 8 (23.5%); the results of ICGA revealed PED associated with choroidal neovascularization (CNV) in 12 (35.3%), PED associated with ploypoidal choroidal vasculopathy (PCV) in 17 (50.0%), PED associated with both CNV and PCV in 1 (2.9%), and avascular PED in 4 (11.8%). Conclusions PED in Chinese patients more than 50 can be associated with CNV, PCV or other avascular diseases, and PCV is the most common intercurrent choroidal vascular disease. (Chin J Ocul Fundus Dis, 2006, 22: 224-227)
OBJECTIVE:To elucidate the nature of degenerations in canine peripheral retina and compare the degenerations with those in human peripheral retina. METHODS: Examining randomly the peripberal fundus of eighty eye balls of forty dogs wdh dissecting microscope. The lesions of degenerations were photographed and processed for light microscopic examination. RESULTS:Typical Cystoid degeneralion,reticular degenerative retinoschisis, paving-stone degeneration, and lattice degeneration were discovered. The pathologic findings of these degenerations were same as or similar to those of the degenerations in human peripheral retina. CONCLUSIONS:The atrophic retinal degenerations that are similar to human' s are present at peripheral fundus in canine eyes. （Chin J Ocul Fundus Dis,1996,12: 151-152）
OBJECTIVE:To inwestigate the value of fundus fluorescein angiography in evaluation of idiopathic senile macular hole(ISMH). METHODS:fundus fluorescein angiography(FFA)and other clinical examination were performed in 26 cases (31eyes)of ISMH patients. RESULTS:Full-thickness macular holes were in 17 and lamellar holes were in 14 of the 31 eyes. Hyperfluorescencequot;window defectquot;was found at the base of all the eyes with full-thickness maeular holes and 2 eyes with lamellar holes. The size of hyperfluorescence zone was smaller than that of those seen in redfree film, hyperfluorescence in 6 eyes (19.4%) showed homogenous ancl 10 eyes (32.5%) granular in pattern. The small yellowish dots in macular hole showed blocked fluorescence,while the halo of macular hole showed hyperfluorescence. CONCLUSION:Fundus fluorescein angiography was useful in differentiating lamellar from full-thickness macular hole and understanding the degree of retinal pigment epithelium damages in macular holes. （Chin J Ocul Fundus Dis,1996,12: 208-210 ）
In recent years, more and more new diagnostic and examining techniques are popularized, which improves the level of ocular fundus disease diagnosis and treatment. Because of the uneven distribution of diagnostic and therapeutic instruments resources, low level of application techniques, and different professional level of the doctors, the improvement and development of the application of the equipments and level of the diagnosis and treatment were inhibited. Appropriate understanding and applying basic diagnostic techniques of ocular fundus disease and comprehensive promoting the professionalsprime; levels are an urgent problem needs to be solved.
Objective To compare the characteristics of the results of fundus fluorescein angiography (FFA) and indocyanine green angiography (ICGA) in patients with classic choroidal neovasculazation (CNV). Methods The data of FFA and ICGA of 34 patients (36 eyes) with classic CNV were analyzed retrospectively and the results of the two examinations were analyzed contrastively. Results The results of FFA revealed the clew or cartheel-tike configuration of classic CNV at the early phase in 3 out of 15 eyes (20%) with age-related macular degeneration (AMD); in 5 out of 7 eyes with pathological myopia(71.4%); and in 9 out of 14 eyes with central exudative chorioretinopathy (CEC),(64.3%),In 36 eyes with classic CNV, the images of ICGA indicated CNV distinctly in 20 (55.6%) and indistinctly in 15 (41.6%); CNV was not detected by ICGA in 1 eye (2.8%); feeding blood vessels in 6 eyes (16.7%) were detected by ICGA but none by FFA. Conclusions At the early phase of FFA, the configuration of classic CNV is clew-like in eyes with pathological myopia and CEC, and erose in eyes with AMD. The image of ICGA which indicated the outline of classic CNV is not as clear as the one of FFA, but it can reveal the feeding vessels which FFA can not. (Chin J Ocul Fundus Dis, 2006, 22: 217-209)
Microaneurysm is the initial symptom of diabetic retinopathy. Eliminating this lesion can effectively prevent diabetic retinopathy in the early stage. However, due to the complex retinal structure and the different brightness and contrast of fundus image because of different factors such as patients, environment and acquisition equipment, the existing detection algorithms are difficult to achieve the accurate detection and location of the lesion. Therefore, an improved detection algorithm of you only look once (YOLO) v4 with Squeeze-and-Excitation networks (SENet) embedded was proposed. Firstly, an improved and fast fuzzy c-means clustering algorithm was used to optimize the anchor parameters of the target samples to improve the matching degree between the anchors and the feature graphs; Then, the SENet attention module was embedded in the backbone network to enhance the key information of the image and suppress the background information of the image, so as to improve the confidence of microaneurysms; In addition, an spatial pyramid pooling was added to the network neck to enhance the acceptance domain of the output characteristics of the backbone network, so as to help separate important context information; Finally, the model was verified on the Kaggle diabetic retinopathy dataset and compared with other methods. The experimental results showed that compared with other YOLOv4 network models with various structures, the improved YOLOv4 network model could significantly improve the automatic detection results such as F-score which increased by 12.68%; Compared with other network models and methods, the automatic detection accuracy of the improved YOLOv4 network model with SENet embedded was obviously better, and accurate positioning could be realized. Therefore, the proposed YOLOv4 algorithm with SENet embedded has better performance, and can accurately and effectively detect and locate microaneurysms in fundus images.
ObjectiveTo explore the necessity, construction plans, and implementation methods for the establishment of a fundus disease-specific biobank are discussed. MethodsAn evidence-based medicine study. “Biobank”, “Disease-specific biobank”, “Eye diseases”, “Fundus disease” were hereby used as search terms. Literatures were retrieved related to biobank construction from PubMed, Embase, China National Knowledge Infrastructure, and Wanfang databases since their establishment until October 2023. Two researchers independently selected and analyzed literature, extracting data for further analysis. ResultsAfter screening, 23 articles were included, comprising 11 articles in Chinese and 12 articles in English, involving 23 institutions. The disease-specific biobank has been built earlier abroad than domestically. Both domestic and foreign biobank have a scale of less than 1, 1 to 10, and more than 10 thousand samples, with the eye disease-specific biobank having less than 10 thousand samples. The majority of these disease-specific biobank focued on tumor-related diseases and consist of both physical and information components. Ethical committees were required to declare and record the construction of biobank, and dedicated personnel and information management systems are established. Quality control systems have been developed with standard operating procedures from sample collection to storage. These disease-specific biobank effectively supported research projects, but there was a lack of resource sharing domestically compared to abroad. Based on practical experience, the construction of fundus disease-specific biobank at West China Hospital of Sichuan University has been improved. Separate sample collection processes have been formulated for outpatient clinics and operating rooms. Standard operating procedures have been established for unique eye samples, including vitreous fluid, proliferative membranes of the retina, aqueous humor, tears, etc., to ensure sample quality. ConclusionEstablishing a fundus disease-specific biobank can promote basic and clinical research, advance the development of translational medicine, achieve resource sharing, and foster discipline development.