H C Zweng’s research while affiliated with Stanford University and other places

... Indocyanine green (ICG) angiography reveals hyperfluorescent areas that correspond to leaking points, and the choroid appears partly hypofluorescent owing to RPE atrophy and partly hyperfluorescent owing to the choriocapillary hyperpermeability. [2][3][4] Optical coherence tomographic (OCT) examinations reveal subretinal fluid and an irregular profile of the internal margin of the neurosensory retinal detachment secondary to a thickening and elongation of photoreceptor outer segments. A double-layer sign may appear with an undulating RPE profile, a hyporeflective middle layer, and an intact or slightly thickened Bruch membrane. ...

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Chronic Central Serous Chorioretinopathy Imaged by Optical Coherence Tomographic Angiography

... Laser-induced retinal lesions find many therapeutic applications in ophthalmology.'- 3 The lesions are a result of thermal damage induced in tissue by the absorbed laser light. Photocoagulation of the retina by an argon laser is used to treat diseases ranging from retinal detachment to diabetic retinopathy. ...

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Calibrated real-time control of lesion size based on reflectance images

... Right after the invention of the laser by Maiman in 1960 [11], many more types of lasers were launched [12]. Moreover, pulsed lasers were studied as potential tools in biomedical applications [13,14], and only 5 years after its invention, the laser was used for precise tissue coagulation [15]. ...

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Laser in Bone Surgery

... Following these criteria, 43 threshold data from ten studies were excluded 13,20,58,[64][65][66][68][69][70][71] and 253 threshold data published in 31 studies were found to be applicable for the purpose of model validation. 11,13,14,20,34,35,[54][55][56][57][58][59][60][61][62]65,67,[72][73][74][75][76][77][78][79][80][81][82][83][84][85] IV. ...

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Validation of a computer model to predict laser induced retinal injury thresholds

... Protein denaturation occur at a temperature of about 60 °C [11]. A study by Peppers et al. (1969) indicated that thermal damage of the cornea starts at 67 °C [12]. Temperature differences of metal eye shields did not meet thermal value for protein denaturation despite application of high fluence and multiple laser pulses and omission of cooling methods. ...

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Thermal eye injuries from dermatologic laser treatments—an experimental study

... B Qiang Wu qiang.wu@shsmu.edu.cn 1 Department of Ophthalmology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China the clinical practice for diagnosing and monitoring NV [11]. However, ophthalmologists or specially qualified technicians and graders may need to manually analyze a few crosssectional OCT B-scan pictures from the volumetric scan slice by slice to identify NVD from OCTA images and determine blood flow information. ...

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A deep learning system for the detection of optic disc neovascularization in diabetic retinopathy using optical coherence tomography angiography images

... The argon green laser trial of extrafoveal CNV (200–2500 lm from the center of the foveal avascular zone) showed 25% and 60% severe visual loss in treated and untreated patients, respectively [14]. However, 59% of treated patients developed recurrent neovascularization, often soon after treatment (24% at 6 months, 43% by 1 year) [15]. The krypton red laser study treated juxtafoveal CNV lesions with a posterior border 1 to 199 lm from the center of the foveal avascular zone. ...

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Context for Protons as Adjunctive Therapy in Neovascular Age-Related Macular Degeneration: A Review

... In the current study, all patients who developed early postoperative VH were phakic, showed active fibrovascular membranes and none experienced ocular hypotony. Preoperative panretinal photocoagulation was not performed due to the risk of contraction of preretinal membranes [22][23][24], instead it was performed at end of surgery. To reduce the risk of intraoperative bleeding, IVB was injected 3-5 days prior to surgery in this series, but no more than 5 days to avoid causing fibrovascular contraction and subsequent worsening of the retinal detachment [25][26][27]. ...

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Twenty-seven-gauge vitrectomy for combined tractional and rhegmatogenous retinal detachment involving the macula associated with proliferative diabetic retinopathy

... Detaillierte Berechnungen mit dem Arrheniusformalismus unter Verwendung bekannter Parameter zur thermischen Schädigung der Netzhaut [22] ergaben jedoch, dass mit den zur SRT be- ...

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Selektive Retinatherapie: Methodik, Technik und Online-Dosimetrie

... Способ доставки -ключевой аспект лазерной фототерапии. В то время как рубиновый лазер был адаптирован к монокулярному прямому офтальмоскопу, последующие поколения лазеров стали адаптировать к непрямому офтальмоскопу [4], щелевой лампе [5] и операционному микроскопу [6]. Сочетание лазеров со щелевой лампой улучшило доставку лазерного излучения, особенно для его применения в области заднего полюса глаза, что позволило проводить лечение широкого спектра заболеваний сетчатки и хориоидеи в амбулаторных условиях. ...

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Possibilities of Using Laser Radiation in Vitreoretinal Surgery