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Refractive accuracy after intraocular lens implantation in pediatric cataract

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International Journal of Ophthalmology(English edition) 2012年第4期5卷 473-477页

作者： Tan Long, li-xin xie Department of Ophthalmology People's Hospital of Wuhan University Wuhan 430060 Hubei Province China Shandong Eye Institute Qingdao 266071 Shandong Province China

AIM: To analyze the factors that influence the prediction error (PE). after intraocular lens (IOL) implantation in pediatric cataract. METHODS: The medical records of cataract patients of no more than 14 years old who had primary IOL implantation were reviewed from 2006 to 2010. The PE, absolute value of PE (APE), and predictability between in different axial length, mean corneal curvature, corneal astigmatism, and age at the surgery were analyzed. RESULTS: Seventy-five children (119 eyes) were included, with a mean age of (5.09 +/- 2.54) years. At the follow-up of (1.19 +/- 0.69) months, the mean postoperative PE was (-0.22 +/- 1.12) D, and APE was (0.87 +/- 0.73)D. The PE in eyes with an axial length > 20mm but lity was significantly poorer in the eyes with an axial length <= 20mm than the others. CONCLUSION: The axial length is closely related with the PE after IOL implantation in pediatric cataract patients, especially when it is <= 20mm, PE is more significant. The formula that is more suitable to very short axial length should be explored.

关键词： cataract children refraction intraocular lens

Comparison of 25-gauge sutureless vitrectomy and 20-gauge vitrectomy in the treatment of posterior capsule opacification in pseudophakic children

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International Journal of Ophthalmology(English edition) 2015年第6期8卷 1179-1183页

作者： Xiao-Ming Wu li-xin xie Qingdao University Medical College Shandong Eye Institute

AIMTo compare the effectiveness and safety of pars plana capsulotomy and vitrectomy using 25-gauge tansconjunctival sutureless vitrectomy system and 20-gauge vitrectomy system for posterior capsule opacification (PCO) in pseudophakic *** study. Pars plana capsulotomy and vitrectomy using 25-gauge sutureless vitrectomy system was performed for PCO in the study group (32 eyes). Patients in the control group (34 eyes) underwent capsulotomy and vitrectomy using standard 20-gauge vitrectomy system, providing a comparison between 2 groups with regard to preoperative and postoperative best corrected visual acuity (BCVA), intraocular pressure (IOP), and intraoperative and postoperative complications. The two groups were performed consequentially. The patients ages ranged from 2 to 13y (means: 6.61±2.73y). Surgical technique, intraoperative and postoperative complications, visual acuity, IOP, and recurrent PCO were *** surgical procedure was performed uneventfully in all patients. Visual acuity improved significantly in both groups. BCVA improved in 22 eyes (81.5%) in the study group and in 28 eyes (87.5%) in the control group. There was no statistical difference of visual acuity that were attainable in two groups (H=0.115, P=0.909). Mean postoperative IOP showed no significant difference between the groups at 1wk. All sort of PCO were accomplished by 20-gauge system, while 25-gauge system was effective for pearls style and 2 grade of fibrous PCO, and was insufficient to grade 3 of PCO. In the study group two cases were not accomplished by 25-gauge system while 20-gauge system conquered them. Compared with the control group, mean operative time for opening and closing the sclerotomy in the study group was considerably reduced. The mean follow-up was 38.2mo (range: 8-79mo). During the follow-up period, no incision leakage, corneal edema, vitreous loss, IOL damage, retinal detachment, recurrent PCO, or other complications wer

关键词： posterior capsular opacity vitrectomy cataract children

Monitoring and limiting Deceptive Counterfeiting:a Two-Stage Model

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Journal of the Operations Research Society of China 2016年第3期4卷 265-308页

作者： Fang liu Ke liu xin-li xie Nanyang Business School Nanyang Technological UniversitySingapore 639798Singapore Key Laboratory of Management Decision and Information Systems and National Center for Mathematics and Interdisciplinary SciencesAcademy of Mathematics and Systems SciencesChinese Academy of SciencesBeijing 100190China School of Business and Management The Hong Kong University of Science and TechnologyHong KongChina

Over past decades,deceptive counterfeits which cannot be recognized by ordinary consumers when purchasing,such as counterfeit cosmetics,have posed serious threats on consumers’health and safety,and resulted in huge economic loss and inestimable brand damages to the genuine goods at the same ***,how to effectively control and eliminate deceptive counterfeits in the market has become a critical problem to the local *** of the principal challenges in combating the cheating action for the government is how to enhance the enforcement of relative quality inspection agencies like industrial administration office(IAO).In this paper,we formulate a two-stage counterfeit product model with a fixed checking rate from IAO and a penalty for holding *** the total expected cost over two stages,the retailer adopts optimal ordering policies which are correlated with the checking rate and *** certain circumstances,we find that the optimal expected cost function for the retailer is first-order continuous and *** optimal ordering policy in stage two depends closely on the inventory level after the first sales *** the checking rate in stage one falls into a certain range,the optimal ordering policy for the retailer at each stage is to order both kinds of *** the retailer’s optimal ordering policy at each stage,IAO can modify the checking rate accordingly to keep the ratio of deceptive counterfeits on the market under a certain level.

关键词： Deceptive counterfeits Fixed checking rate Penalty Inventory Optimal ordering policy Storage Reservoirs

Atomic Coherent Trapping and Properties of Trapped Atom

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Communications in Theoretical Physics 2006年第3X期46卷 556-560页

作者： YANG Guo-Jian XIA li-xin xie Min Department of Physics Beijing Normal University Beijing 100875 China

Based on the theory of velocity-selective coherent population trapping, we investigate an atom-laser system where a pair of counterpropagating laser fields interact with a three-level atom. The influence of the parametric condition on the properties of the system such as velocity at which the atom is selected to be trapped, time needed for finishing the coherent trapping process, and possible electromagnetically induced transparency of an altrocold atomic medium, etc., is studied.

关键词： velocity selective coherent population trapping ultracold atom

Correlation of basic indicators with stages of keratoconus assessed by Pentacam tomography

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International Journal of Ophthalmology(English edition) 2015年第6期8卷 1136-1140页

作者： Xian-li Du Min Chen li-xin xie Qingdao University Qingdao Eye Hospital Shandong Eye Institute Shandong Academy of Medical Sciences

AIM: To evaluate the diagnostic efficiency of basic indicators and find characteristic indicators for keratoconus (KC) at adjacent stages, and to assess the progression pattern of KC. METHODS: One hundred and eight (41 subclinical, 40 moderate, and 27 severe) keratoconic patients (108 eyes) and 105 myopic patients (105 eyes) as controls were recruited in this prospective, comparative case series study. Pentacam topography was performed. Receiver operating -characteristic curves were used to get the characteristic indicators. RESULTS: The most efficient distinguishing index between the subclinical KC and the controls was posterior elevation value (PEV, AUC =0.882), with the highest specificity being 93.8%. Corneal thickness (AUC=0.852) and posterior inferior-superior value (I-S) ranked second and third (AUC=0.776). When KC became moderate, PEV remained to be of the highest diagnostic efficiency (AUC=0.988), followed by the anterior elevation value (AUC=0.986) and other parameters of anterior surface. The diagnostic value increased significantly in the anterior curvature indices (all AUC >0.900) and appeared in the anterior best fitting sphere radius (AUC= 0.919) when KC developed into the severe stage. CONCLUSION: In the subclinical stage of KC, PEV, thickness, and posterior I-S had important diagnostic values, and elevation values remained most efficient when KC developed to the moderate stage. The anterior curvature indices were most characteristic when KC became severe. KC first appeared in the inferior cornea of posterior surface, but the feature of protrusion formed at the moderate stage.

关键词： keratoconus progression pattern Pentacam topography diagnostic efficiency

Fusarium solani Activates Dectin-1 in Experimentally Induced Keratomycosis

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2018年第1期38卷 153-159页

作者： ling-juan XU li-xin xie Department of Ophthalmology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China State Key Laboratory Cultivation Base Shandong Provincial Key Laboratory of OphthalmologyShandong Eye instituteQingdao 266071China

In this study,the response of Dectin-1 on macrophages to Fusarium solani(***)and the expression patterns of Dectin-1 in experimentally ***-induced keratomycosis were *** macrophages isolated after intraperitoneal injection of sodium thioglycollate were co-cultured with laminarin and spores of *** for 12 *** expression levels of Dectin-1 and CARD9 were detected by immunofluorescence and real-time quantitative polymerase chain reaction.A mouse model of fungal keratitis was established by substromal inoculation with spores of *** lesions and inflammatory responses were observed by slit-lamp and histopathology at 1,2,3,5,and 7 day(s)after ***-1 expression was significantly upregulated on macrophages stimulated by spores of ***-1 was not detected in normal corneas of C57 BL/6 mice,but detected in infected corneas from the first day after inoculation,with high m RNA levels observed on days 2 and ***9,a key transducer of Dectin-1 signaling,was also upregulated in infected *** conclusion,Dectin-1 is an important recognition receptor in ***-induced keratitis,but the molecular mechanisms warrant further investigation.

关键词： Dectin-1 Fusarium solani keratitis

Pediatric traumatic cataract and surgery outcomes in eastern China: a hospital-based study

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International Journal of Ophthalmology(English edition) 2013年第2期6卷 160-164页

作者： Ying-Nan Xu Yu-Sen Huang li-xin xie Weifang Medical University Shandong Eye Institute

AIM: To evaluate the etiologies, management, and outcomes of pediatric traumatic cataract in eastern China. METHODS: Pediatric traumatic cataract were reviewed for demographic information, type of injury, mode of injury, time of injury, interval between injury and first visiting doctors, hospital of first visiting, surgeries, complications and prognosis. RESULTS: A total of 117 eyes of 117 patients (96 boys and 21 girls) with unilateral injuries (66 right and 51 left eyes) were included in the study. The mean (SEM) age at diagnosis was (6.6 ±3.2) years (range, 1.3-13.8 years). Each cataract was categorized according to the type of trauma: closed-globe (n =26) or open-globe (n =91) injuries. The most common injuring objects were sharp metal objects (37.61%). The most common complication in open-globe injuries was corneal laceration, whereas traumatic mydriasis was most common in closed-globe injuries. Of 68 eyes in patients with open-globe injuries who received cataract extraction, intraocular lens (IOLs) were primarily implanted in 47 eyes (68.12%), whereas 18 eyes with closed-globe injuries received cataract extraction, and IOLs were primarily implanted in 17 eyes (94.4%). The surgical procedures included reconstruction of the anterior segment, synechiolysis, excision of the membrane, lensectomy, vitrectomy and related techniques. Postoperative vision was significantly improved compared with preoperative vision. CONCLUSION: Pediatric traumatic cataract should be treated in time to attenuate the complications, and education on pediatric traumatic cataract and improvements in pediatric health care are needed for the early detection of cataract in children.

关键词： children trauma cataract

Classification and spectrum optimization method of grease based on infrared spectrum

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Friction 2024年第6期12卷 1154-1164页

作者： xin FENG Yanqiu XIA Peiyuan xie Xiaohe li School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

The infrared(IR)absorption spectral data of 63 kinds of lubricating greases containing six different types of thickeners were obtained using the IR *** Kohonen neural network algorithm was used to identify the type of the lubricating *** results show that this machine learning method can effectively eliminate the interference fringes in the IR spectrum,and complete the feature selection and dimensionality reduction of the high-dimensional spectral *** 63 kinds of greases exhibit spatial clustering under certain IR spectrum recognition spectral bands,which are linked to characteristic peaks of lubricating greases and improve the recognition accuracy of these *** model achieved recognition accuracy of 100.00%,96.08%,94.87%,100.00%,and 87.50%for polyurea grease,calcium sulfonate composite grease,aluminum(Al)-based grease,bentonite grease,and lithium-based grease,*** on the different IR absorption spectrum bands produced by each kind of lubricating grease,the three-dimensional spatial distribution map of the lubricating grease drawn also verifies the accuracy of classification while recognizing the *** paper demonstrates fast recognition speed and high accuracy,proving that the Kohonen neural network algorithm has an efficient recognition ability for identifying the types of the lubricating grease.

关键词： grease infrared(IR)spectroscopy layered Kohonen network species recognition spectrum band optimization

Outcomes of different lines of keratoconus management in a tertiary eye center in north China

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International Journal of Ophthalmology(English edition) 2022年第4期15卷 568-575页

作者： Jing Zhang Xian-li Du Lei Wan Yan-ling Dong li-xin xie Eye Institute of Shandong First Medical University Qingdao 266071Shandong ProvinceChina State Key Laboratory Cultivation Base Shandong Provincial Key Laboratory of OphthalmologyQingdao 266071Shandong ProvinceChina School of Ophthalmology Shandong First Medical UniversityQingdao 266071Shandong ProvinceChina

AIM: To evaluate the treatment selections and outcomes of keratoconus and discuss the grading treatment of ***: Medical records of 1162 patients(1863 eyes) with keratoconus treated with rigid gas permeable(RGP), corneal collagen crosslinking, and keratoplasty were reviewed. The patients were grouped according to the CLEK Study. The advanced group was further divided into a 60 D group. The best-corrected visual acuity(BCVA) and topographic data before and after treatment were ***: In the 761 eyes with steep K60 D, surgical management accounted for 90.6%. A total of 618 eyes had improved BCVA at the final fol ow-up point(>18 mo, P52 D, the BCVA and topographic astigmatism outcomes showed no differences among the treatment groups. When steep K was >60 D, the BCVA in eyes treated with LKP was worse than those with steep Klity of future keratoplasty in RGP was higher in advanced group(14.8% vs 7.0%, P=0.027). The incidence of steep K progression in the corneal collagen crosslinking(CXL) group was higher in advanced group(32.3% vs 8.5%, P=0.007). Multivariate logistic regression revealed the following related factors for treatment options: steep K [odds ratio(OR)=1.208, 95%CI: 1.052-1.387], TA(OR=1.171, 95%CI: 1.079-1.270), and TCT(OR=0.978, 95%CI: 0.971-0.984). The level of steep K, TA, and TCT all relates to the treatment choices of both keratoplasty and non-keratoplasty, while steep K provided the highest diagnostic accuracy(AUC=0.947, P<0.001).CONCLUSION: Steep K is an important grading treatment indicator. When steep K is <52 D, RGP lenses should be recommended. It i

关键词： keratoconus management rigid gas permeable corneal collagen crosslinking keratoplasty