全文获取类型
收费全文 | 217篇 |
免费 | 52篇 |
专业分类
儿科学 | 15篇 |
基础医学 | 9篇 |
口腔科学 | 6篇 |
临床医学 | 2篇 |
内科学 | 13篇 |
皮肤病学 | 1篇 |
神经病学 | 8篇 |
特种医学 | 2篇 |
外科学 | 1篇 |
综合类 | 1篇 |
预防医学 | 11篇 |
眼科学 | 199篇 |
药学 | 1篇 |
出版年
2023年 | 1篇 |
2021年 | 1篇 |
2020年 | 19篇 |
2018年 | 14篇 |
2017年 | 20篇 |
2016年 | 17篇 |
2015年 | 6篇 |
2014年 | 26篇 |
2013年 | 8篇 |
2012年 | 13篇 |
2011年 | 21篇 |
2010年 | 10篇 |
2009年 | 22篇 |
2008年 | 14篇 |
2006年 | 4篇 |
2005年 | 3篇 |
2004年 | 3篇 |
2003年 | 6篇 |
2002年 | 12篇 |
2001年 | 4篇 |
2000年 | 4篇 |
1999年 | 1篇 |
1998年 | 13篇 |
1997年 | 3篇 |
1996年 | 4篇 |
1995年 | 4篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1991年 | 1篇 |
1989年 | 1篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1973年 | 1篇 |
排序方式: 共有269条查询结果,搜索用时 78 毫秒
91.
92.
M. Gonzalez de la Rosa MD PhD M. Gonzalez-Hernandez OD PhD 《Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft》2013,110(2):107-115
We present a review and update on Pulsar perimetry, which combines temporal frequency, contrast and spatial frequency stimuli. The effects of age, visual acuity, and learning on results are described. Data on threshold fluctuation, signal-to-noise ratio, and the possibility of reducing noise with filtering techniques are provided. We describe its dynamic range and the possibility of compensating for profound defects. Finally, we show the results obtained in normal patients and in those with ocular hypertension or initial glaucoma, as well as an analysis of glaucoma progression. The English full-text version of this article is available at SpringerLink (under supplemental). 相似文献
93.
94.
Å Vege TO Rognum H Scott AO Aasen OD Saugstad 《Acta paediatrica (Oslo, Norway : 1992)》1995,84(2):193-196
Cerebrospinal fluid (CSF) from 20 infants who died of sudden infant death syndrome (SIDS), 7 cases of infectious death and 5 cases of violent death were examined with respect to concentrations of interleukin-6 (IL-6). The measurements were performed by ELISA. IL-6 levels in SIDS were significantly lower than in infectious death (p < 0.02), but significantly higher than in violent death (p < 0.02). Since IL-6 plays an important role in immune responses and may induce fever, the findings may suggest that immune activation plays a role in SIDS. The presence of cytokines in the central nervous system (CNS) may cause respiratory depression, especially in vulnerable infants. 相似文献
95.
OD Wolthers A Juul M Hansen J Muller S Pedersen 《Acta paediatrica (Oslo, Norway : 1992)》1995,84(4):393-397
Serum concentrations of growth hormone–dependent insulin–like growth factor I (IGF–I) and insulinlike growth factor binding protein–3 (IGFBP–3), the carboxy terminal propeptide of type I procollagen (PICP), the carboxy terminal pyridinoline cross–linked telopeptide of type I collagen (ICTP) and the amino terminal propeptide of type III procollagen (PIIINP) were studied in 14 prepubertal children with asthma (mean age 9.7 years) during treatment with inhaled budesonide. The study design was a randomized, crossover trial with two double–blind treatment periods (200 and 800 μg) and one open, non–randomized treatment period (400 μg ). All periods were 18 days'duration. Budesonide treatment was associated with a dose–related suppressive trend in serum concentrations of PIIINP when the 400 μg period was included (p < 0.01; z =–2.7) and when it was excluded from the calculations (p < 0.01; z =–2.6), indicating reduced synthesis of type III collagen. A similar trend was observed in ICTP levels when the 400 μg period was excluded from the calculations (p = 0.05; z =–1.9). No other statistically significant variations were seen. 相似文献
96.
97.
Vimal Sarup MD Kenneth J. Wald MD Nicole E. Gross MD Aditya N. Athanikar MD Frank Siringo OD 《Annals of Ophthalmology》2006,38(4):347-349
Vitreomacular traction (VMT) caused visual symptoms in two healthy young adults but spontaneously resolved within four weeks
without any sequelae. Optical coherence tomography (OCT) and fundus photographs proved vital in documenting the rare complete
resolution of VMT. It is prudent to monitor for spontaneous resolution of VMT in young healthy adults.
Disclosure The authors have stated that they do not have a significant financial interest or other relationship with any product
manufacturer or provider of services discussed in this article. The authors also do not discuss the use of off-label products,
which includes unlabeled, unapproved, or investigative products or devices. 相似文献
98.
99.
Peter C Pang PDip BSc MPhil Carly S Lam MSc PhD MCOptom FAAO George C Woo OD MSc PhD LOSc FAAO FVCO 《Clinical & experimental optometry》2010,93(5):341-348
Background: This study aims to determine the factors affecting the accuracy in the Developmental Eye Movement (DEM) test measurement for Cantonese‐speaking children. Method: The voices of 10 Cantonese‐speaking children (aged between six and eight years) undertaking the vertical test (40 numbers) of the DEM test were recorded on a digital audio recorder. These voice clips were assessed by an experienced examiner to give the DEM test times. The examiner repeated the measurement five times for each voice clip and completed all 10 voice clips from the 10 children. The average of a single measurement, the mean of two, the mean of three and the mean of five repeated measurements were then compared. Five experienced and five inexperienced examiners of the DEM test were asked to record the results from five Cantonese‐speaking children by listening to the playback of prerecorded audio clips. The deviation of the results from the preset values between the two groups was compared. Results: There is no difference between the single measurement and those obtained by mean of two, three, four or five. Both experienced and inexperienced examiners obtained a higher deviation from the preset values in the adjusted compared with the non‐adjusted times in both vertical and horizontal times. Experienced examiners measured the vertical times and adjusted vertical times significantly closer to the preset values than the inexperienced examiners (paired t‐test, p < 0.05). Conclusion: The DEM test needs to be measured only once for an accurate time measurement. Inaccurate assessment of ‘reading errors’ in the DEM test can increase the inaccuracy of the adjusted times. It is suggested that an audio recording of the test be made to allow reassessment of reading errors. Experience in using the DEM test yields a more accurate DEM measurement as errors are detected more easily. 相似文献
100.
Gordon Balazsi MD FRCSC Marc Mullie MD FRCSC Lynn Lasswell OD Patti A. Lee Yi-Jung Duh PhD 《Journal of cataract and refractive surgery》2001,27(12):1942-1951
PURPOSE: To evaluate the safety and effectiveness of and patient satisfaction with laser in situ keratomileusis (LASIK) performed with a scanning excimer laser by experienced surgeons to correct low and moderate levels of myopia and astigmatism. SETTING: Clinique Laservue, Montreal, Quebec, Canada. METHODS: A consecutive series of 125 patients (236 eyes) with myopia of -0.5 to -7.0 diopters (D) and cylinder less than 2.5 D were enrolled in this single-center prospective clinical trial. The patients were treated with LASIK and followed for 6 months. The System-ALK Automated Corneal Shaper microkeratome (Bausch & Lomb Surgical) with a 180 microm thickness plate and the Technolas 217 excimer laser (Bausch & Lomb Surgical) with PlanoScan software for the stromal ablation were used in all procedures. Since this version of PlanoScan tended to undercorrect, a mean of 14.7% was added to the standard nomogram. Patient satisfaction was assessed by questionnaires administered preoperatively and 1 and 6 months postoperatively. Retreatments for enhancement were not performed during the 6-month follow-up. RESULTS: Six months after LASIK (86.4% follow-up), the mean postoperative manifest spherical equivalent was +0.02 D +/- 0.64 (SD) compared with a preoperative mean of -4.01 +/- 1.59 D. The uncorrected visual acuity was 20/40 or better in 94.6% of eyes and 20/20 or better in 81.9%. A total of 91.2% were within +/-1.0 D of emmetropia and 73.0% were within +/-0.5 D. Only 2 eyes were overcorrected by >1.0 D. Of the eyes with astigmatic myopia, 86.8% were within +/-1.0 D of the intended cylinder correction (by vector analysis) and 73.0% were within +/-0.5 D. The refractions were generally stable after 1 month, and the change in refraction between postoperative examinations was within +/-0.5 D in 88.0% of eyes. A 1-line decrease in best spectacle-corrected visual acuity was seen in 11.3% of eyes, and no eye lost more than 1 line. An increase of 1 or 2 lines was seen in 45.1%. No intraoperative problems occurred, and the interface was clear in all eyes. At 6 months, most symptoms present significantly more frequently than preoperatively were "mild"; none were "marked" or "severe." A total of 90.5% of eyes were reported with marked to extreme improvement in the overall quality of vision, and 99.0% of patients said they would choose LASIK surgery again. CONCLUSIONS: Mild to moderate myopia, with and without astigmatism, was corrected safely, effectively, and predictably with a high degree of patient satisfaction using LASIK with a scanning excimer laser and the System-ALK Automated Corneal Shaper. 相似文献