Objectives:To understand the medical students'cognition of violence injury medical and the impact of medical injury events reports on medical students.Methods:A sample survey was conducted among 480 medical students in a medical university using self-developed questionnaire.Results:A total of 63.67％ of the medical students get violence injury events information through television news;more than 90％ of medical students were concerned about the media reports of violence injury medical events.The media reports of violence injury medical events had an important impact on medical students,and especially television reports had the greatest impact.41.2％ of the students would enhance their awareness of protection;37.9％ of medical students thought that work passion and enthusiasm would decline;the impact of reports on men was bigger than women (P ＜ 0.05).Conclusion:The report of violence injury medical events has an important impact on medical students.The media should improve self-discipline,create a harmonious public opinion environment and promote the healthy development of doctor-patient relationship.

Background Corneal collagen cross-linking (CXL) shows good clinical effects for keratoconus,and de-epithelized CXL appears to be benefit to the distribution and absorption of riboflavin in cornea stroma.However,de-epithelization of CXL will increase the infective risk and corneal healing time.It is very important to understand and control the affecting factors of corneal repair after de-epithelization of CXL.Objective This study was to evaluate the characteristics of corneal epithelial repair and analyze the relevant factors affecting corneal healing time after de-epithelized CXL.Methods A series-cases observational study was performed.De-epithelized CXL was performed on 77 eyes of 68 keratoconus patients in Shandong Eye Hospital from September 2013 to September 2015 under the approval of Ethic Committee of this hospital and informed consent of each patient.The age,corneal curvature,corneal thickness,breakup time of tear film (BUT),corneal front astigmatism (Astig) and epithelial healing time of the patients were recorded after surgery.The correlations between corneal epithelium healing time and above-mentioned factors were analyzed.Results De-epithelized CXL was smoothly finished in all the eyes.The corneal epithelium healing time was 2-12 days after surgery,with the average healing time 5 (4,6) days.The mean age,thickness at corneal thinnest point,minimal cornea curvature (Kf),maximal corneal curvature (Ks),corneal average curvature (Km) and Astig was 22.00 (18.00,25.00) years,436 (412,470) μm,47.40 (44.70,50.45) D,52.10 (49.00,54.55) D,50.00 (47.15,53.15) D and-3.30 (-5.45,1.70) D,respectively.Spearman rank correlation analysis showed significant negative correlations between corneal epithelium healing time and BUT or the thickness at corneal thinnest point (BUT:rs =-0.334,P =0.003;corneal thickness:rs =-0.417,P =0.000),and thesignificant positive correlations were found between corneal epithelium healing time and Km,Kf and Ks (Km:rs =0.449,P =0.000;Kf:rs =0.300,P =0.008;Ks:rs =0.432,P =0.000).There were no considerable correlarions between corneal epithelium healing time and age or Astig (age:rs =0.023,P =0.845;Astig:rs =-0.190,P =0.098).Multiple linear regression analysis were carried out to study the dependent variable and independent factors.Because of the multiple co-linearity between variables,this paper corrects the model by using ridge regression.There is significant negative correlation between BUT,corneal thickness and corneal healing time,respectively (both at P＜0.05),corneal curvature Km and Kf is positively correlated with corneal healing time (both at P ＜ 0.05).Conclusions The corneal thickness,Kf,Km,as well as BUT are influencing factors of epithelial healing after CXL.

Objective　To compare the irradiation-protective and inter-synergestic effects of E838,WR-2721, Rubia cordifolia, cystamin e hydrochloride and ethinyl estradiol on radiation and combined radiation-burn injury. Methods　Above-mentioned drugs were given to the mice i ntraperitoneally, or intragastrcally, then, the mortality and the average surviv al d for 30 d were observed before and after the administration of the drug s. Results　①When drugs were before injury , the survival rate and the average survival d of the radiation and combined radiation-burn injured mice were increased obviously with the best effect in E838 and WR-2721. ②When drugs were given after injury, E838 and R. cordifolia also kept the effect. ③Combined appling WR-2721（pre) and E838（post）displayed a significant syner gistic reaction. Conclusion　E838 and WR-2721 are more e ffective than the others in the prevention of radiation.

Objective To investigate the clinical feature and treatment outcome of paediatric posttraumatic endophthalmitis.Methods A retrospective case study was performed.Twenty-six paediatric posttraumatic endophthalmitis children with 26 eyes were enrolled in Shandong Eye Hospital from April 2014 to April 2017.The clinical features,causes of trauma,time and mode of treatment,complications and visual acuity were analyzed.The subjects were graded according to the prognostic status,and the prognosis of the children was compared among different treatment time,vitrectomy time,operation frequency and antibiotic application.Results Of 26 cases,including 20 males and 6 females,aged from 1 year to 13 years,the average age was (6.56±3.25) years.The subjects were divided into infant group (2 cases,7.69％),preschool group (10 cases,38.46％) and school age group (14 cases,53.85％).The main cause of injury was wire,accounting for 34.62％ (9/26).Syringe needles accounted for 15.38％ (4/26).Fireworks accounted for 11.54％ (3/26).All of the 26 cases received vitrectomy,24 cases combined with lens extraction (92.31％).Among the 26 cases,8 cases had no primary visual acuity record;in the remaining 18 cases,the visual acuity at last follow-up was significantly improved when compared with the preoperative primary visual acuity (x2 =7.385,P =0.033).The positive rate of pathogenic bacteria culture in aqueous humor and vitreous humor was 23.08％ (6/26),gram-positive cocci was the main pathogenic bacteria of posttraumatic endophthalmitis,which account for 83.3％ (5/6).The prognostic grade was grade 1 in 15 cases (57.7％),grade 2 in 7 cases (26.9％) and grade 3 in 4 cases (15.4％).There were significant differences in the number of prognostic grading cases among children with different hospitalizing time or vitrectomy time (all at P＜0.05).The hospitalizing time,time of vitrectomy,number of operations and systemic application of antibiotics were positively correlated with the prognosis grade (rs =0.580,0.414,0.428,0.535;all at P ＜ 0.05).Conclusions Children with posttraumatic endophthalmitis should undergo vitrectomy as early as possible,which can receive better prognosis.

Objective To assess the tear film stability and morphological characteristics of the tarsal gland in myopic children.Methods In this prospective descriptive study,myopic children who performed refractive examinations in the Pediatric Ophthalmology & Refraction Clinic,Jinan Mingshui Eye Hospital from November 2021 to November 2022 were in-cluded.An Ocular Surface Disease Index(OSDI)questionnaire survey was carried out;tear meniscus height(TMH),non-invasive first breakup time(NIf-BUT)and images of the tarsal glands were obtained by OCULUS Keratograph 5M compre-hensive ocular surface analyzer.In addition,the atrophy and tortuosity of tarsal glands were scored to analyze the tear film stability and clinical characteristics of tarsal glands in myopic children.Results A total of 48 myopic children(91 eyes)aged from 7 to 16(10.25±2.23)years were recruited,including 27 males(56.25％)and 21 females(43.75％).The aver-age TMH was(0.19±0.04)mm(95％CI:0.18-0.19)and the average NIf-BUT was(5.40±2.62)s(95％CI:4.90-5.94);the TMH was positively correlated with NIf-BUT(r=0.223,P=0.034).The tarsal gland atrophy score was 1(0,1).The tortuosity score of the upper and lower tarsal gland was 0(0,1)and 0(0,0),respectively,with a statistically significant difference(Z=3.692,P＜0.001).In all subjects,49 eyes(53.85％)had tarsal gland atrophy,and 37 eyes(40.66％)had tarsal gland tortuosity.There were significant differences in TMH and NIf-BUT between children aged＜12 years and children aged ≥12 years(both P＜0.05).There was a significant difference in TMH between children with an OSDI score＜13 and children with an OSDI score ≥ 13(t=2.305,P=0.026).There was a significant difference in NIf-BUT between mild and moderate myopia children(t=2.300,P=0.024);the spherical equivalent was positively correlated with NIf-BUT(r=0.283,P=0.023).Conclusion Children with mild to moderate myopia show low tear film stability and a certain proportion of abnormal morphology in tarsal glands.In addition to the refractive status of children,attention should also be paid to ocular surface health in the refraction clinic.