Objective:To explore the circular capsulorhexis method and its clinical effect in phacoemulsification of hypermature cataract without staining.Methods:In this prospective randomized case-control study,22 patients(22 e...Objective:To explore the circular capsulorhexis method and its clinical effect in phacoemulsification of hypermature cataract without staining.Methods:In this prospective randomized case-control study,22 patients(22 eyes)with hypermature cataract were randomly divided into a staining agent group(10 cases,10 eyes)and a non-staining agent group(12 cases,12 eyes).Both groups underwent phacoemulsification with foldable intraocular lens implantation under topical anesthesia.In the staining agent group,0.5%indocyanine green was used to stain the anterior lens capsule to assist in circular capsulorhexis;in the non-staining agent group,after puncturing the anterior lens capsule and aspirating the liquefied cortical material,the capsular bag was filled with viscoelastic agent to increase the contrast prior to circular capsulorhexis.The operability of the anterior capsule without staining in capsulorhexis was observed,and the effect of capsulorhexis,diameter of capsulorhexis opening,and operative time were compared and analyzed between the two groups.Results:Both groups successfully underwent circular capsulorhexis,with a success rate of 100%.The diameters of capsulorhexis opening in the staining agent group and non-staining agent group were 5.68±0.15 mm and 5.54±0.16 mm,respectively,without any statistical difference between the groups(P>0.05);the operative time of the staining agent group(40.40±5.42 s)was shorter than that of the non-staining agent group(50.92±3.97 s),and the difference was statistically significant(P<0.001).In both groups,phacoemulsification was successful,and intraocular lens were implanted into the capsular bags;their visual acuity showed significant improvement during the 1-month follow-up period after surgery,without any surgical complications.Conclusion:In hypermature cataract,injecting viscoelastic agent into the capsular bag for volume replacement,given a lack of capsule staining agent,can increase the contrast for capsulorhexis and reduce the risk of large capsular bag collapse on the zonular ligament.Thus,it is considered safe and effective.Circular capsulorhexis is conducive to a smooth phacoemulsification procedure.展开更多
Land surface albedo is an important parameter to describe the radiant forcing in the climate system.A long-time series of global albedo products is needed to understand the mechanism of climate change.Aiming to suppor...Land surface albedo is an important parameter to describe the radiant forcing in the climate system.A long-time series of global albedo products is needed to understand the mechanism of climate change.Aiming to support global change and Earth system studies,GLASS(Global LAnd Surface Satellites)provides long-term global land surface albedo product from 1981 to 2010,which are generated from multisource remote sensing data and newly developed algorithms.It is critical to assess the quality of the GLASS product when it is released to the public.This paper first introduced the algorithms and then analyzed the integrity,accuracy,and robustness of the GLASS albedo product.The results show that the GLASS albedo product is a gapless,long-term continuous,and self-consistent data-set with an accuracy similar to that of the widely acknowledged MODIS MCD43 product.The quality flag,which is provided along with the black-sky and white-sky albedo,gives a pertinent indication of the expected uncertainty in the product.展开更多
基金the First Affiliated Hospital of Xi’an Medical College(XYFYPT-2023-01)Medical Research Project of Xi’an Science and Technology Bureau(21YXYJ0127).
文摘Objective:To explore the circular capsulorhexis method and its clinical effect in phacoemulsification of hypermature cataract without staining.Methods:In this prospective randomized case-control study,22 patients(22 eyes)with hypermature cataract were randomly divided into a staining agent group(10 cases,10 eyes)and a non-staining agent group(12 cases,12 eyes).Both groups underwent phacoemulsification with foldable intraocular lens implantation under topical anesthesia.In the staining agent group,0.5%indocyanine green was used to stain the anterior lens capsule to assist in circular capsulorhexis;in the non-staining agent group,after puncturing the anterior lens capsule and aspirating the liquefied cortical material,the capsular bag was filled with viscoelastic agent to increase the contrast prior to circular capsulorhexis.The operability of the anterior capsule without staining in capsulorhexis was observed,and the effect of capsulorhexis,diameter of capsulorhexis opening,and operative time were compared and analyzed between the two groups.Results:Both groups successfully underwent circular capsulorhexis,with a success rate of 100%.The diameters of capsulorhexis opening in the staining agent group and non-staining agent group were 5.68±0.15 mm and 5.54±0.16 mm,respectively,without any statistical difference between the groups(P>0.05);the operative time of the staining agent group(40.40±5.42 s)was shorter than that of the non-staining agent group(50.92±3.97 s),and the difference was statistically significant(P<0.001).In both groups,phacoemulsification was successful,and intraocular lens were implanted into the capsular bags;their visual acuity showed significant improvement during the 1-month follow-up period after surgery,without any surgical complications.Conclusion:In hypermature cataract,injecting viscoelastic agent into the capsular bag for volume replacement,given a lack of capsule staining agent,can increase the contrast for capsulorhexis and reduce the risk of large capsular bag collapse on the zonular ligament.Thus,it is considered safe and effective.Circular capsulorhexis is conducive to a smooth phacoemulsification procedure.
基金the National High Technology Research and Development Program of China(Grant No.2009AA122100)the authors also want to thank the FLUXNET community for providing the radiometric measurements。
文摘Land surface albedo is an important parameter to describe the radiant forcing in the climate system.A long-time series of global albedo products is needed to understand the mechanism of climate change.Aiming to support global change and Earth system studies,GLASS(Global LAnd Surface Satellites)provides long-term global land surface albedo product from 1981 to 2010,which are generated from multisource remote sensing data and newly developed algorithms.It is critical to assess the quality of the GLASS product when it is released to the public.This paper first introduced the algorithms and then analyzed the integrity,accuracy,and robustness of the GLASS albedo product.The results show that the GLASS albedo product is a gapless,long-term continuous,and self-consistent data-set with an accuracy similar to that of the widely acknowledged MODIS MCD43 product.The quality flag,which is provided along with the black-sky and white-sky albedo,gives a pertinent indication of the expected uncertainty in the product.
