AIM: To investigate the topography of the anterior surface of the human crystalline lens. ·METHODS: A Non-contact three-coodinate measuring system was utilized to scan the anterior surfaces of 8 human eye lenses in vitro. Acquired data were processed and computer models of the anterior lens surfaces were made using the program (Surfacer v 10.0). The to-pography of the anterior lens surfaces were established. Radii of curvature were measured at preset spots over the lens surfaces and two way analysis of variance was performed. The data were analysed to determine whether the radius of curvature varied systematically with the position on the lens surface from which the measurement was made. Lens surface asymmetric index (LSAI) was defined and calculated. The vertical and horizontal meridians of the modeled lens were calculated, and the best curve fit to any conic section was determined. ·RESULTS: The topography of the anterior lens surface indicated that the central zone (the central radius of curvature is (9.09±0.80)mm was steeper than that of the peripheral zone(17.05±2.20)mm. Two way analysis of variance of the radii of curvature at preset spots over the lens surfaces showed that the differences were statistically significant (P ＜ 0.05). Curve regression of radii of curvature at preset spots and their distances to the surface center revealed that the correlation of them was the third power function. LSAI increased steadily from the lens surface center(0.013±0.005) to the periphery(0.184± 0.065). The dots on the horizontal and vertical meridians were fit to four kinds of curves, and the determinate coefficient of hyperbola fit were the largest (0.9989-0.9999). ·CONCLUSION: The anterior lens surface is imperfectly rotational symmetric. Moreover, the nearer to the center, the more rotational symmetric it is. Radii of curvature increase nonlinearly from the surface center to the periphery. Anterior lens surface is typically hyperbolic.

Abdomen ; Acupuncture Therapy ; methods ; Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Vertigo ; therapy

Background Posterior capsular opacification (PCO) following cataract extracapsular extraction is a major cause of the reduction of visual acuity.Topical administration of eye drops is a research hotspot for the prevention of PCO.Objective This study was to evaluate the release of cyclosporine A-loaded chitosan nanoparticles (CyA-CS-NP) by ionic gelation in vitro and its feasibility of modification of the surface of polymethylmethacrylate intraocular lens (PMMA IOL) with CyA-CS-NP.Methods The CS-NP and CyA-CS-NP were prepared by ionic gelation of CS with sodium tripolyphosphate.The characteristics of CS-NP,such as the appearance and mean size,and drug entrapment efficient (EE),loading capacity (LC),and the drug release were studied ; the CyA content on the IOL surface was detected by high performance liquid chromatography (HPLC).The IOL surface modified with CyA-CS-NP was observed by scanning electron microscope and X-ray photoelectron spectroscopy technique (XPS),the changes of elements and chemical bond types between simple plasma processed IOL and CyA-CS-NP modified IOL were analyzed.The transmittance at the wavelength of 360-490 nm and refraction of IOL were detected using back focal length method and spectrophotometer,and the effective resolution of IOL was evaluated according to the instruction of ISO/CD 11979-2.Loops anti fatigue test of IOL referred to the criteria of ISO/CD 11979-3.Results The CS-NP and CyA-CS-NP showed monodisperse,uniform appearance similar to spherical shape with a mean size of (158±18) nm and (219±29) nm,respectively.The CyA-CS-NP had high CyA association efficiency and loading capacity (64.2％ and 7.6％).In vitro release study revealed a fast release on the first day followed by a increased drug release during an 11-day following up.The sustained release was approximately 46.6％ at day 1 and 77.7％ at day 12,respectively.The surface of IOLs with cling film was smooth without CS-NP;while the edge of IOLs appeared a layer of CyA-CS-NP after modification.XPS analysis displayed some elements such as phosphonium,CNH2 and O =CN that appeared on the modified surface,indicating that CyA-CS-NP existed on the surface of IOLs edge.The mean quality of CyA on three IOLs surface after modification was 171.88 μg.The diopter,distinguishing ability and transmittance of modified IOL were (16.64±0.23) D,(90.28 ± 0.25) ％ and (73.57 ±0.62) ％,and those of unmodified IOL were (16.62±0.29) D,(90.28±0.21) ％,(73.61±0.60)％,without significant differences between them (t =0.381,0.078,2.291,all at P ＞ 0.05).The antifatigue ability of loops complied with the criteria of ISO/CD 11979-3.Conclusions The optical property and antifatigue ability of loops of the edge-modified IOLs by CyA-CS-NP reach the normal standard and meet the requirement of clinic application.The edge-modified IOLs by CyA-CS-NP can be a delivery system for intraocular drug release.

Objective: To seek the optimum technology of drying and to solve the problem of powder sticking clump. Methods : On the basis of major drying condition, such as duration of drying, temperature of drying, evaluating different drying technology; On the basis of the quantity of the powder sticking on the wall and the hygroscopicity of one, investigating different excipients how to affect the spray drying. Seeking the optimum kinds and quantity of excipients. Results : The best properties of the granules are from the spray drying process. ?-cyclodextrin and lactose have the effects on solving the powder sticking on the wall. Conclusion : The spray drying process is the optimum one. Adding 3～5 percent of ?-cyclodextrin has an effect on improving the phenomenon of powder sticking on the wall in process of the spray drying.

The Snaith-Hamilton Pleasure Scale (SHAPS) is a self-assessment scale designed to evaluate anhedonia in various psychiatric disorders. To facilitate its use in Malaysian settings, our current study aimed to examine the validity of the Simplified-Chinese translated version of the SHAPS (SHAPS-SC) in a group of subjects at a university out-patient clinic. Method: A total of 40 depressed patients were recruited in this cross sectional study. They were given both the Simplified Chinese and Malay versions of SHAPS, General Health Questionnaire 12 (GHQ-12) and Beck Depression Inventory (BDI) to assess their hedonic state, general mental health condition and level of depression. Results: Our study showed that SHAPS-SC had impressive internal consistency (Cronbach’s alpha 0.84) and concurrent validity, and fair parallel-forms reliability (Pearson’s correlation 0.39). Conclusion: SHAPS-SC demonstrate good psychometric properties in the evaluation of hedonic state among a group of Chinese speaking depressed patients in an out-patient setting. It is easy to administer and suitable as a valid and reliable questionnaire in assessing anhedonia among depressed patients in Malaysia.
Patients ; Depression ; Outpatient Clinics, Hospital

Objective To explore the cataract surgery quality on blindness prevention and postoperative problems in village in short period. Design Population-based survey. Participants 251 cases(254 eyes) received operation and 131 cases(134 eyes)were surveyed 6-month postoperatively. Methods Patients were examined 6-month after the small incision extracapsular cataract extraction and intra ocular lens(IOL) implantation. Examinations were conducted by a special oculist including far vision, near vision, external in- spection, anterior segment, posterior segment, intraocular pressure. Main Outcome Measures Visual acuity, intraocular pressure, diopter, eye complications of surgery. Results Naked far vision of the operated eye more than or equal to 0.3 was 41.8%, naked far vi- sion of the eye more than or equal to 0.05 was 82.8%; corrected far vision more than or equal to 0.3 was 64.2%, corrected far vision more than or equal to 0.05 was 92.3%. Naked near vision more than or equal to 0.1 was 79.9%, corrected near vision more than or e- qual to 0.1 was 85.8%. The main postoperative complications were ametropia, posterior capsule opacification(PCO), deformed pupil, pupil displacement, pigments of IOL, eccentric IOL and intraocular hypertension. The chief reasons of eyes that could not be recovered were vitreous, retina or optic nerve diseases, the key factors that caused living vision less than 0.3 were ametropia, PCO, the disease of vitreous, retina and optic nerve. Conclusions The serious complications affecting the surgery result are limited in a low range. The most important factors of the eye corrected far vision less than 0.05 are the vitreous, retina and optic nerve diseases. In order to improve the visual sight, we should add equipment to calculate the IOL diopter accurately.

ObjectiveTo evaluate the clinical feasibility of low dose MSCT for quantitative assessment of pulmonary function in smokers.MethodsOne hundred and forty-six patients with chronic objective pulmonary disease ( COPD ) including 109 smokers ( 74.6％ ) and 37 non-smokers ( 25.3％ )underwent pulmonary function test and low-dose MSCT scan.All data were analyzed using computer-aided lung anlysis software.Pulmonary function parameters from low-dose MSCT were compared between smokers and non-smokers and also compared with pulmonary function test in non-smokers ( Pearson test).Results In smokers,the average volume at full inspiratory phase (Vin) was (5125 ± 862 ) ml,mean lung attenuation was ( - 902 ± 26 ) HU,mean lung density was (0.0984 ± 0.0260 ) g/cm3,emphysema volume was (2890 ±1370) ml.The average volume at full expiratory phase (Vex) was (2756 ±1027) ml,mean lung attenuation was ( -811 ±62) HU,mean lung density was (0.1878 ±0.0631 ) g/cm3,emphysema volume was (685 ±104) ml.In non-smokers,the average Vin was (3734 ± 759) ml,mean lung attenuation was ( -876 ±40) HU,mean lung density was (0.1244 ±0.0401 )g/cm3,emphysema volume was ( 1503 ± 1217) ml.The average Vex was ( 1770 ± 679 ) ml,mean lung attenuation was ( - 765 ± 56 ) HU,mean lung density was (0.2360 ± 0.0563 ) g/cm3,emphysema volume was ( 156 ± 45 ) ml.There were significant differences between smokers and non-smokers (P ＜0.01 ).The Vex/Vin was correlated with residual volume/total lung capacity ( RV/TLC,r =0.60,P＜0.01 ),and Vin was correlated with TLC ( r =0.58,P ＜ 0.01 ),Vex with RV ( r =0.59,P＜0.01 ).Pixel index ( PI ) -950in was correlated with FEV 1％ pre and FEV1/FVC％ ( r =- 0.53,- 0.62,respective,P ＜ 0.01 ),Pl-950ex was correlated with FEV1 ％ pre and FEV1/FVC％ ( r =-0.71,-0.77,respective,P＜0.0l).ConclusionLow-dose MSCT can be a potential imaging tool for quantitative pulmonary function assessment in smokes.

?AIM: To study the association of the single nucleotide polymorphism ( SNP) rs1157699 in the calcitonin receptor-like receptor ( CRLR ) gene with primary angle closure ( PAC) in a Han Chinese population.?METHODS: All samples, involved 232 PAC cases and 306 controls, were obtained from an epidemiologic survey conducted in Funing, Jiangsu Province, China. Genotyping were carried out by TaqMan-MGB probe using the real time quantitative polymerase chain reaction system to study the relationship between SNP of rs1157699 in CRLR gene and PAC.?RESULTS: The prevalence of CRLRrs1157699 genotype was 67.4%, 30.0%, 2.6% for CC, CT, TT in cases, and 71.3%, 27.0%, 1.7% in controls respectively.There was no difference between the two groups in the distribution of genotype and allele frequencies of rs1157699 (P>0.05).?CONCLUSION:Our results do not support a significant role for rs1157699 in CRLR with PAC.

Objective To evaluate the relevance of MSCT pulmonary function parameters and pulmonary function test (PFT) parameters, and to define the reference value of MSCT pulmonary function parameters. Methods Thirty male volunteers received clinical PFT and MSCT scan. MSCT scan was perfomed at the end of the maximum inspiratory and maximum expiratory. All data were analyzed with the lung analysis software of computer-aided inspection system correlatedly with pulmonary function parameters. Results The lung volume at full inspiratory volume (Vin) and full expiratory volume (Vex) in MSCT scan had good correlation with total lung capacity (TLC) and residual volume (RV) (r=0.90, P<0.01; r=0.74, P<0.01). Vex/Vin was correlated with RV/TLC (r=0.74, P<0.01), and Vin-Vex was correlated with MVC (r=0.85, P<0.01). In inspiration, the average lung density was (-879.51±32.82) HU, the density per unit volume was (0.12±0.03) g/cm3, while in expiratory they were (-688.14±62.38) HU and (0.31±0.06) g/cm3. Conclusion MSCT pulmonary function tests with the analysis software of computer-aided inspection system have good correlation with PFT.

r diagnosing the disease to combine pathology, immunohistochemistry and SYT-SSX gene detection.