精准的屈光规划——人工晶状体屈光力计算，是屈光性白内障手术的重要前提。人工晶状体计算公式使用患者术前的眼部生物学参数如眼轴长度、角膜曲率、前房深度、晶状体厚度等指标来预测患者在白内障术后的屈光状态。人工晶状体屈光力计算公式自1967年出现以来，不断发展革新，准确性得到了极大的提升。封面展示了几种基于不同原理而构建的计算公式：回归公式(以SRK公式为代表)、基于模型眼的会聚公式(以Holladay 1等为代表)、射线追踪公式(以Olsen为代表)与人工智能公式(以RBF为代表)。目前对于普通白内障患者，现有公式能够获得良好的预测准确性。然而，对于临床上很多特殊的患者(如眼球解剖参数异常、既往有其他眼病或眼部手术史)，如何准确预测术后的屈光状态仍存在较大的挑战。路途漫漫，学者们为提升人工晶状体屈光力计算准确性的努力却从未止步，力求为患者提供最佳的白内障手术效果。
精准的屈光规划——人工晶状体屈光力计算，是屈光性白内障手术的重要前提。人工晶状体计算公式使用患者术前的眼部生物学参数如眼轴长度、角膜曲率、前房深度、晶状体厚度等指标来预测患者在白内障术后的屈光状态。人工晶状体屈光力计算公式自1967年出现以来，不断发展革新，准确性得到了极大的提升。封面展示了几种基于不同原理而构建的计算公式：回归公式(以SRK公式为代表)、基于模型眼的会聚公式(以Holladay 1等为代表)、射线追踪公式(以Olsen为代表)与人工智能公式(以RBF为代表)。目前对于普通白内障患者，现有公式能够获得良好的预测准确性。然而，对于临床上很多特殊的患者(如眼球解剖参数异常、既往有其他眼病或眼部手术史)，如何准确预测术后的屈光状态仍存在较大的挑战。路途漫漫，学者们为提升人工晶状体屈光力计算准确性的努力却从未止步，力求为患者提供最佳的白内障手术效果。
该文报道一例30岁的男性患者因“双眼自幼视力不佳，强光下视物模糊加重4年余”就诊，经过眼部检查评估，诊断为双眼瞳孔残膜、双眼屈光不正。患者接受一期双眼瞳孔残膜切除、二期双眼行有晶状体眼后房型环曲面人工晶状体(toric implantable collamer lens,TICL)植入手术，术后视力恢复良好。文章回顾了该例患者的诊治过程，为临床屈光不正同时伴有瞳孔残膜患者的诊治提供参考。
A 30-year-old male patient presented at our institution with a history of poor vision in both eyes since childhood, exacerbated by blurriness under bright light for over four years. Following a comprehensive ophthalmic examination, the patient was diagnosed with bilateral pupillary membrane remnants and refractive errors. The patient underwent a two-stage surgical intervention, starting with the removal of the pupillary membrane remnants, followed by the implantation of toric implantable collamer lenses (TICL) in the posterior chamber of the lensless eyes. Postoperative outcomes were favorable, with significant improvement in visual acuity. This article reviews the therapeutic journey of the patient, offering insights into the diagnosis and management of individuals with concurrent refractive anomalies and pupillary membrane remnants, thereby contributing to the clinical discourse on the subject.
随着角膜疾病治疗技术的不断进步，前弹力层移植技术(包括Inlay和Onlay技术)已成为晚期圆锥角膜治疗的重要手段，能有效改善患者的角膜地形图和视力结果，稳定角膜扩张，提高患者的生活质量。该文综述了前弹力层移植技术的理论基础、移植物的来源与制备技术、手术技术、临床疗效以及相关并发症，为晚期圆锥角膜的治疗提供了新的视角。研究表明，这种先进的移植技术相较于传统方法，在减少手术风险、简化手术流程以及加快术后恢复方面具有明显优势，特别是在降低异体移植物排斥反应及手术并发症的风险上，前弹力层移植表现出色。Onlay技术作为一种近期开发的新方法，其独特优势是无需剖离角膜，更好地保护角膜结构。此外这种技术的高度适应性和可逆性，为患者提供了更多的治疗选择和更好的视觉恢复。尽管如此，技术细节如移植物的尺寸和形状定制、手术深度的最优化等方面仍需进一步研究和优化，以提高整体治疗效果。
With the continuous advancement of corneal disease treatment technology, Bowman layer transplantation (including Inlay and Onlay technology) has become an important means for the treatment of advanced progressive keratoconus, which can effectively improve the corneal topography and visual acuity of patients, stabilize corneal dilation, and improve the quality of life of patients. Tis article reviews the theoretical basis of Bowman layer transplantation, the source and preparation of grafs, surgical techniques, clinical efcacy, and related complications, which provides a new perspective for the treatment of advanced keratoconus. It is stated in the research that this advanced transplantation technique has significant advantages over traditional methods in reducing surgical risks, simplifying the surgical procedures, and improving postoperative recovery. Especially in reducing the risk of allograft rejection and surgical complications, the bowman layer transplantation performs excellently. As a novel developed method, Onlay technology has the unique advantage of eliminating the need to dissect the cornea, which beter protects the corneal structure. In addition, due to the highly adaptable and reversible nature of this technique, it provides patients with more treatment options and beter visual recovery. However, in terms of technical details such as customizing the size and shape of the transplant, optimizing the surgical depth, etc., it is needed to conduct further research and optimization to improve the overall treatment efect.
因不同的眼部和神经性疾病，导致视觉功能严重受损，为低视力患者日常活动(如阅读及驾驶)及生活质量、心理健康带来严重的影响。人们对外界信息的感知主要来源于视觉，除威胁生命的重大疾病外，对人感官影响最大的损害当属视觉损伤。且随着人口日益老龄化，该问题日趋加重，低视力已成为目前全球范围内一个严重的公共卫生问题。目前，低视力康复发展面临着临床和科研的巨大挑战，要研发出一种能有效改善视觉功能，同时能兼顾多种功能的视障辅助技术，这需要医学、生物学、工程学、微电子学、计算机学等多学科的共同发展和相互合作。低视力康复通过为患者提供适宜的视障辅助技术，最大化利用患者的残余视力及视觉功能，改善与低视力相关的功能限制，有效改善其独立性和整体生活质量，使其独立生活、工作并融入社会成为可能。该文对经典的助视器、人工视觉(视觉假体/视觉感官替代设备)、经颅刺激及视觉生物反馈训练等视障辅助技术在低视力康复中的应用进展进行综述。
Patients with low vision are severely impaired in visual function due to different ocular and neurological disorders,which have a serious impact on their daily activities (such as reading and driving), quality of life and mental health.People's perception of external information mainly comes from vision. Expect for the life-threatening major diseases,visual damage has the greatest impact on people's senses. With the ageing of the population, the problem is getting worse, and low vision has become a serious public health problem in the world. Currently the development of low vision rehabilitation is facing a huge challenge in clinical and scientific research, to develop a visual impairment assistance technology that can effectively improve visual function while balancing multiple functions. It requires the joint development and cooperation of multiple disciplines such as medicine, biology, engineering, microelectronics, and computer science. Low vision rehabilitation provides patients with appropriate visual impairment assistance technology,maximizing the use of residual vision and visual function of patients, improving the functional limitations associated with low vision, effectively improving their independence and overall quality of life, and makes it possible for them to live, work and integrate into the society independently. This article reviews the progress in the application on visual impaired assistive technologies such as classic visual aids, artificial vision (visual prostheses/visual sensory replacement devices), transcranial stimulation and visual biofeedback training in low vision rehabilitation.
目的：探究T盒转录因子2(T-box transcription factor 2,TBX2)在葡萄膜黑色素瘤(uveal melanoma,UVM)中的表达水平、生存预后、免疫浸润相关性。方法：首先通过TIMER2.0数据库分析正常组织和肿瘤组织中TBX2表达和临床特征，从UCSC Xena数据库下载泛癌的生存数据，使用Cox比例风险模型和Kaplan-Meier曲线分析评估TBX2对预后的预测价值。然后使用cBioPortal数据库分析人源TBX2突变前后生存改变，通过BloodSpot和TIMER2.0数据库探究TBX2与癌症免疫浸润之间的相关性。癌症单细胞状态图谱和基因集变异分析(gene set variation analysis,GSVA)探究其表达与分子机制的相关性。结果： 15种肿瘤类型的TBX2 mRNA表达水平显著改变，TBX2是肾上腺皮质癌(adrenocortical carcinoma,ACC)、肾乳头状细胞癌(kidney renal papillary cell carcinoma,KIRP)、UVM典型的生存预后标志物。其突变与生存状态无明显相关性，在UVM中T淋巴细胞浸润水平提高导致不良预后风险升高。此外，在UVM中TBX2通路富集至ATP结合盒(ATP-binding cassette transporter,ABC)转运蛋白、DNA修复和损伤。结论：TBX2在UVM的生存和免疫浸润中起着关键作用，将来可能作为一种UVM预后及免疫治疗效果的预测因子。
Objective: To investigate the expression level of T-box transcription factor 2(TBX2) in uveal melanoma (UVM), the correlation between survival prognosis and immune infiltration. Methods: The expression and clinical features of TBX2in normal and tumorwere analyzed by TIMER2.0 database. The survival data of pancarcinoma were downloaded from UCSC Xena database, and the prognotic value of TBX2 was evaluated using Cox proportional risk model and Kaplan-Meier curve analysis. Then cBioPortal database was used to analyze the changes before and after TBX2 mutation survivalin human, and BloodSpot and TIMER2.0 databases were used to explore the correlation between TBX2 and cancer immune infiltration. Cancer single cell status mapping and gene set variation analysis (GSVA) were used to explore the correlation between its expression and molecular mechanisms. Results: The mRNA expression levels of TBX2 were significantly changed in 15 tumor types. TBX2 is adrenocortical carcinoma (ACC) and kidney renal papillary cell carcinoma (Kidney renal papillary cell carcinoma). KIRP and UVM are typical prognostic markers of survival. The mutation had no significant correlation with survival status, and increased T cell infiltration level in UVM led to increased risk of poor prognosis. In addition, the TBX2 pathway is enriched to the ATP-binding cassette transporter (ABC) transporters, DNA repair, and damage in UVM. Conclusion: TBX2 plays a key role in survival and immune invasion of uveal melanoma.and may be used as a predictor of UVM prognosis and immunotherapy effect in thefuture.
目的：比较单一EYESi虚拟手术模拟器(Dry-lab)、Wet-lab以及两种方式联合教学在超声乳化白内障吸除显微手术培训中的效果及差异，以期探索更科学高效的教学方式。方法：选取中山大学中山眼科中心接受住院医师规范化培训的1年级住院医师18名，随机分为Dry-lab组、Wet-lab组和联合组，每组各6人，分别接受8次有效Dry-lab训练、8次Wet-lab训练、4次有效Dry-lab训练联合4次Wet-lab训练。培训前后问卷调查评估三种教学方式的模拟效果与学员满意度，并在猪眼模型上考核超声乳化白内障吸除手术的三个主要步骤，以评估学员的培训效果。结果：Dry-lab与Wet-lab训练均能有效帮助学员学习使用显微器械，操作手感较好。但在立体感(P=0.007)、与人眼操作相比近似度(P<0.001)以及对掌握技术的帮助度(P=0.003)上，Wet-lab优于Dry-lab训练；而在缩短培训用时(P<0.001)上，Dry-lab培训更具优势。联合培训模式培训效果优于单一Wet-lab训练(P=0.014)和模拟器培训(P=0.012)，整体满意度高于Wet-lab训练(P=0.042)和Dry-lab培训(P=0.042)。结论：Dry-lab与Wet-lab训练在超声乳化白内障吸除显微手术培训中各有优势，而两者相结合的教学模式更为高效，培训效果更佳，整体满意度高。
Objective: To compare the effects and distinctions among three methods of phacoemulsification training: EYESi simulator (Dry-lab), Wet-lab, and a combined approach, in order to find out more scientific and efficient teaching method. Methods: 18 first-year residents undergoing residency training at Zhongshan Ophthalmic Center, Sun Yatsen University were randomly assigned to three groups: Dry-lab, Wet-lab, and Combined. Each group, consisting of 6 individuals, underwent a specific training regimen—8 sessions of effective simulator training for the Dry-lab group, 8 Wet-lab sessions for the Wet-lab group, and a combination of 4 effective simulator sessions with 4 Wet-lab sessions for the Combined group. The questionnaires were administered to assess simulation effects and student satisfaction before and after each training sessions. Additionally, the training effects were recorded in the three main steps of phacoemulsification cataract extraction surgery on a pig eye model. Results: Both the EYESi simulator and Wet-lab were proved to be effective in facilitating the learning of microscopic instrument use with commendable operating experience. However, Wet-lab is superior to the virtual simulator in terms of stereoscopic sensation (P=0.007), similarity to the human eye (P<0.001), and assistance in mastering techniques(P=0.003). Simulator training is found to be more advantageous in shortening the overall training time (P<0.001). The training effect of the joint training mode is better than that of single Wet-lab training (P=0.014) and simulator training (P=0.012), and the overall satisfaction is higher than that of Wet-lab training (P=0.042) and simulator training (P=0.042). Conclusion: The EYESi virtual surgery simulator and Wet-lab training have their advantages respectively in training for phacoemulsification cataract extraction microsurgery, and the combined teaching mode is more efficient, with better training effects and overall satisfaction.
目的：旨在研究按移植指征分类以及移植前角膜血管形成对手术后5年内排斥反应和移植物失败率的相对风险。方法：分析1999—2017年间，英国移植登记处记录的所有因圆锥角膜(keratoconus,KC)、人工晶状体大泡性角膜病(pseudophakic bullous keratopathy,PBK)或既往感染(病毒/细菌/真菌/原生动物)而首次进行角膜移植的成年人。统计移植前受体角膜血管化象限的数量、血管化类型、移植后排斥反应的间隔时间(如果有的话)以及移植后5年的结果。通过多变量风险调整Cox回归法进行排斥反应和移植失败的危险因素建模。结果：KC、PBK和感染患者的角膜血管形成率分别为10%、25%和67%。只有当存在浅表和(或)深部血管形成时(HR分别为1.3和1.4，P=0.004)，存在两个以上象限的血管形成时，PBK患者移植排斥反应的风险才会增加(HR=1.5，P=0.0004)。因既往感染而接受移植的个体在四个象限的血管形成中发生排斥反应的风险增加(HR=1.6，P=0.003)。在任何一组中，经过风险调整后，与血管形成有关的移植失败率并未上升。对于含有血管的受体角膜，相对于穿透性KC和PBK移植，没有充分的证据显示板层移植在降低排斥反应或失败风险方面存在优势。结论：血管化是5年内角膜移植排斥反应的危险因素。移植的适应证对这种风险的具有临床意义。
Objective: To investigate the relative risk of pretransplant corneal vascularisation on rate of rejection and graft failure within 5 years of surgery when categorised by indication for transplantation. Methods: We analysed all adults recorded in the UK transplant registry who had a first cornea transplant for keratoconus (KC), pseudophakic bullous keratopathy (PBK) or previous infection (viral/bacterial/fungal/protozoan) between 1999 and 2017. We analysed the number of quadrants of the recipient cornea vascularised before transplant and type of vascularisation, the interval posttransplant to rejection, if any, and the outcome at 5 years post-transplant. Risk factors for rejection and transplant failure were modelled by multivariable risk-adjusted Cox regression. Results: Corneal vascularisation was recorded in 10%, 25% and 67% of patients with KC, PBK and infection, respectively. Individuals with PBK had an increased hazard of transplant rejection only when there were more than two quadrants of vascularisation (HR 1.5, p=0.004) when either superficial and/or deep vascularisation was present (HR 1.3 and 1.4, respectively, p=0.004). Individuals who had a transplant for previous infection had an increased hazard of rejection with four quadrants of vascularisation (HR 1.6, p=0.003). There was no risk-adjusted increase in transplant failure associated with vascularisation in any group. There was weak evidence of reduction in risk of rejection and/or failure associated with lamellar compared with penetrating transplantation in KC and PBK in vascularised recipient corneas. Conclusion: Vascularisation is a risk factor for corneal allograft rejection within 5 years. The indication for transplantation has a clinically significant effect on the magnitude of this risk.
目的：比较轻、中、重度近视患儿之间的视觉功能的差异，探索虚拟现实下的短期可塑训练对近视视觉功能的改善效果。方法：选择2022年6月—2022年9月就诊于苏州大学附属儿童医院的6~16岁儿童102例，按照屈光度分为正常对照组、轻度近视组和中重度近视组，进行眼科常规检查和视知觉功能检查，并进行视觉短期可塑训练。结果：近视患儿存在立体视功能缺损，近视程度与精细立体视功能损害呈正相关，各组之间比较差异具有统计学意义(P<0.05)，部分患儿存在中心凹抑制。训练后，轻度近视组的中距离精细立体视功能得到改善，比较差异具有统计学意义(P<0.05)。结论：近视患儿存在立体视功能异常和中心凹抑制，且立体视功能的损害随着近视程度的增加而加重。轻度近视患儿部分精细立体视功能经过虚拟现实短期可塑训练可得到改善，而中重度近视患儿精细立体视功能改善不明显。
Objective: To compare the difference of visual function among children with myopia in different diopter, and explore the effect of short-term plastic training of virtual reality on visual function improvement. Methods: The 102 children aged 6-16 years who admitted to Children's Hospital of SoochowUniversity from June 2022 to September 2022 were recruited and divided into control group, mild myopia group and middle and high myopia group according to diopter. Routine ophthalmologic examination and visual perception function examination were carried out, and short-term plastic training was implemented. After the training, visual perception function examination was completed again. Results: There were significant differences in stereoscopic function defect at different distances among myopic children, a negative correlation between myopia and stereoscopic function was found. while there were several cases have foveal suppression. After training, the fine stereopsis at medium distance of the mild myopia group was significantly improved with significance statistical difference. Conclusions: Myopia can lead to the abnormality of stereopsis and foveal suppression in children. The defect of binocular visual function increases with the increase of myopia. Short term plastic training of virtual reality can partially improve the fine stereoscopic function of mild myopia children whileshowsnosigni ficanceimprovementof the fine stereoscopic function in middle and high myopia group.
息肉样脉络膜血管病变(polypoidal choroidal vasculopathy,PCV)是一种以脉络膜异常分支血管网和血管末端息肉状脉络膜血管扩张灶为特征的眼底疾病。(indocyanine green angiography,ICGA)是诊断PCV的金标准，可见异常分支血管网、息肉样高荧光。(optical coherence tomography,OCT)可见色素上皮脱离(pigment epithelial detachments,PED)、双层征、指状突起、PED切迹、脉络膜增厚等。基于 OCT 的影像学研究表明，PCV属于肥厚型脉络膜谱系疾病(pachychoroid disease spectrum,PCD)，其特征是脉络膜增厚、脉络膜大血管层(Haller层)扩张，伴有毛细血管层(Ruysch层)和中血管层(Sattler层)变薄，其发病机制可能涉及脉络膜、涡静脉、巩膜等相关改变。
随着功能性人工晶状体的推广应用，白内障患者的屈光预测准确性日益受到重视。尽管人工晶状体屈光力计算公式在近年来不断发展革新，但解剖参数异常或既往有其他眼病、眼部手术史的白内障患者屈光预测仍存在挑战。根据生物学参数特点与病史选择适合的人工晶状体屈光力计算公式是准确进行白内障手术屈光预测的重要保障。
With the widespread application of functional intraocular lense (IOL), the accuracy of refractive prediction in cataract patients is increasingly important. Although IOL power calculation formulas have been innovated continuously in recent years, there are still challenges in predicting refractive powerin cataract patients with abnormal anatomical parameters, ocular comorbidities, or a history of ocular surgery. Based on the the characteristics of biological parameters and medical history to selcet appropriate IOL power formula, it is an important guarantee for accurate refractive prediction in cataract patients.
