AIM:To evaluate the clinical outcomes of a new minimally invasive technique using horizontal mattress sutures and Hoffman pockets for four-point refixation of dislocated fourhaptic intraocular lenses(IOLs).METHODS:Thi...AIM:To evaluate the clinical outcomes of a new minimally invasive technique using horizontal mattress sutures and Hoffman pockets for four-point refixation of dislocated fourhaptic intraocular lenses(IOLs).METHODS:This retrospective consecutive case series included eyes with dislocated Akreos AO60 IOLs underwent scleral refixation using a horizontal mattress doubleneedle suture technique with intralamellar knot burial via Hoffman pockets.Clinical outcomes assessed included pre-and postoperative best-corrected visual acuity(BCVA),intraocular pressure(IOP),spherical equivalent(SE),suture duration,IOL centration,and perioperative complications.RESULTS:A total of 10 eyes from 10 patients(6 males)were included.The mean age at the time of IOL refixation was 53.10±13.07y(range:28-68y).The mean interval between initial IOL implantation and dislocation was 8.44±3.54y.The mean postoperative follow-up duration was 11.45±10.30mo.Surgical time averaged 15.3±1.77min,with no intraoperative complications.The mean axial length was 27.16±4.35 mm,with high myopia(HM)as the leading comorbidity(4/10 eyes).Postoperative BCVA significantly improved compared to preoperative values(P=0.025).Postoperative SE was significantly improved compared with preoperative(P=0.01).All IOLs remained centered throughout follow-up.CONCLUSION:This minimally invasive four-point scleral fixation technique offers a safe and effective refixation strategy for dislocated four-haptic IOLs.The horizontal mattress suture configuration combined with Hoffman pockets facilitates durable centration,avoids conjunctival dissection,and could be adopted into routine surgical practice.展开更多
Green stem photosynthesis is well known,but the effect of stem photosynthesis on plant growth and development remains uncertain.In this study,green stems of semiannual Rosa chinensis were subjected to a shading treatm...Green stem photosynthesis is well known,but the effect of stem photosynthesis on plant growth and development remains uncertain.In this study,green stems of semiannual Rosa chinensis were subjected to a shading treatment to explore the effect of stem photosynthesis on the growth and biomass accumulation.The results showed that(1)Stem photosynthesis affected biomass accumulation and allocation in R.chinensis.The stem shading treatment decreased the biomass of R.chinensis by approximately 18.7%.The proportion of biomass allocated to the stems increased while the proportion of biomass allocated to the leaves and roots decreased.(2)Stem photosynthesis facilitates an increase in nonstructural carbohydrate concentration,chlorophyll a concentration and chlorophyll a/b of R.chinensis.(3)The net photosynthesis in the stems of R.chinensis was negative,and biomass accumulation was significantly positively correlated with the dark respiration rate in stems,indicating that stem photosynthesis fixed CO_(2)released internally by respiration.This study reveals that stem photosynthesis in R.chinensis enhances biomass accumulation by promoting chlorophyll fluorescence and dark respiration rates in the stems.Furthermore,stem photosynthesis contributes to the balanced allocation of biomass by enhancing the proportional distribution of biomass to leaves and roots.展开更多
文摘AIM:To evaluate the clinical outcomes of a new minimally invasive technique using horizontal mattress sutures and Hoffman pockets for four-point refixation of dislocated fourhaptic intraocular lenses(IOLs).METHODS:This retrospective consecutive case series included eyes with dislocated Akreos AO60 IOLs underwent scleral refixation using a horizontal mattress doubleneedle suture technique with intralamellar knot burial via Hoffman pockets.Clinical outcomes assessed included pre-and postoperative best-corrected visual acuity(BCVA),intraocular pressure(IOP),spherical equivalent(SE),suture duration,IOL centration,and perioperative complications.RESULTS:A total of 10 eyes from 10 patients(6 males)were included.The mean age at the time of IOL refixation was 53.10±13.07y(range:28-68y).The mean interval between initial IOL implantation and dislocation was 8.44±3.54y.The mean postoperative follow-up duration was 11.45±10.30mo.Surgical time averaged 15.3±1.77min,with no intraoperative complications.The mean axial length was 27.16±4.35 mm,with high myopia(HM)as the leading comorbidity(4/10 eyes).Postoperative BCVA significantly improved compared to preoperative values(P=0.025).Postoperative SE was significantly improved compared with preoperative(P=0.01).All IOLs remained centered throughout follow-up.CONCLUSION:This minimally invasive four-point scleral fixation technique offers a safe and effective refixation strategy for dislocated four-haptic IOLs.The horizontal mattress suture configuration combined with Hoffman pockets facilitates durable centration,avoids conjunctival dissection,and could be adopted into routine surgical practice.
基金supported by the National Natural Science Foundation of China(32271668)the National Key R6DProgram of China(2022YFF0802304).
文摘Green stem photosynthesis is well known,but the effect of stem photosynthesis on plant growth and development remains uncertain.In this study,green stems of semiannual Rosa chinensis were subjected to a shading treatment to explore the effect of stem photosynthesis on the growth and biomass accumulation.The results showed that(1)Stem photosynthesis affected biomass accumulation and allocation in R.chinensis.The stem shading treatment decreased the biomass of R.chinensis by approximately 18.7%.The proportion of biomass allocated to the stems increased while the proportion of biomass allocated to the leaves and roots decreased.(2)Stem photosynthesis facilitates an increase in nonstructural carbohydrate concentration,chlorophyll a concentration and chlorophyll a/b of R.chinensis.(3)The net photosynthesis in the stems of R.chinensis was negative,and biomass accumulation was significantly positively correlated with the dark respiration rate in stems,indicating that stem photosynthesis fixed CO_(2)released internally by respiration.This study reveals that stem photosynthesis in R.chinensis enhances biomass accumulation by promoting chlorophyll fluorescence and dark respiration rates in the stems.Furthermore,stem photosynthesis contributes to the balanced allocation of biomass by enhancing the proportional distribution of biomass to leaves and roots.
