Publications by authors named "Wei-Jian Zhou"

2 Publications

  • Page 1 of 1

Changes in ocular surface status and dry eye symptoms following femtosecond laser-assisted cataract surgery.

Int J Ophthalmol 2019 18;12(7):1122-1126. Epub 2019 Jul 18.

Guangzhou Aier Eye Hospital, Guangzhou 510260, Guangdong Province, China.

Aim: To observe the changes in ocular surface and the dry eye symptoms following femtosecond laser-assisted cataract surgery (FLACS).

Methods: Patients with no eye signs or symptoms in Guangzhou Aier Eye Hospital between October 2017 and September 2018, who underwent FLACS and intraocular lens (IOL) implantation for age-related cataract were enrolled. Tear film stability assessed with OCULUS Keratograph 5M, Schirmer's I test (SIT), and corneal fluorescein staining (CFS) were evaluated before and after surgery at 1d, 1wk, 1, and 3mo in order. Ocular Surface Disease Index scores (OSDI) and Subjective Symptom Questionnaires (SSQs) were recorded at the same time point.

Results: Thirty-eight eyes of 38 patients were enrolled. The noninvasive tear film break-up time (first break-up time and average break-up time) decreased in a peak at the 1wk visit, and then increased to basic levels at 1mo. The tear meniscus height (TMH) increased transiently at 1d, and declined in the following 3mo visits. The SIT had a transient increase at 1d (=0.357) and a decrease at 1wk and 1mo (both <0.05) but returned to the preoperative levels at 3mo after surgery (=0.062). CFS scores were significantly improved compared with those before surgery, and had a statistical difference (<0.05). OSDI scores and SSQs after surgery were obviously higher, and had a statistical difference (<0.001) but didn't return to the basic level by 3mo.

Conclusion: Dry eye signs and symptoms can occur immediately following FLACS and have a peak severity on day 7 postoperatively. Most signs of dry eye can return to preoperative basic levels within 3mo postoperatively. However, all cases can not recover from CFS and dry eye symptoms at 3mo postoperatively.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.18240/ijo.2019.07.11DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6629810PMC
July 2019

Impacts of climate change and human activities on grassland vegetation variation in the Chinese Loess Plateau.

Sci Total Environ 2019 Apr 4;660:236-244. Epub 2019 Jan 4.

State Key Laboratory of Grassland Agro-ecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, No. 222, South Tianshui Road, Lanzhou 730000, China. Electronic address:

China initiated the "Grain for Green Project" in 1999 to mitigate soil erosion. The vegetation cover of the Chinese Loess Plateau, one of the most erosive regions in the world, has been greatly increased. However, studies on quantitatively investigating the climate change and human activities on vegetation coverage change were rare. In this study, spatio-temporal changes in vegetation coverage were investigated using MODIS normalized difference vegetation index (NDVI) data over 2000-2016. And a new method was introduced using Net Primary Productivity (NPP) model and relationship between NPP and NDVI to quantitatively and spatially distinguish the NDVI affected by climate change and human activities. Results showed that mean NDVI value over 2009-2016 were 14.46% greater than that over 2000-2007. In order to quantify the contribution of climate change and human activities to vegetation change, an NPP model suitable for the grassland of the Chinese Loess Plateau was identified using biomass observations from field survey and literature. The NDVI affected by climate change (NDVI) was estimated by the NPP model and the relationship between NPP and NDVI. And the NDVI affected by human activities (NDVI) was calculated by actual NDVI minus NDVI. Comparison of the two stages showed that human activities and climate change contributed 42.35% and 57.65% respectively to the ΔNDVI on grassland in the Loess Plateau. After analysis of numerous NDVI related factors, the slopes restored by the "Grain for Green Project" was considered the main influence factor of human activities.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.scitotenv.2019.01.022DOI Listing
April 2019
-->