Objective To summarize the visual outcome of patients with severe ocular trauma treated with vitreous surgery. Methods Clinical data of 188(191 eyes) with severe ocular trauma treated with vitreous surgery in a period from November 1996 to April 1998 were analysed retrospectively. Results The study included penetrating injury in 56 eyes, foreign bodies in the posterior segment in 70 eyes, blunt injury in 41 eyes , and globe rupture in 24 eyes. Main complications included endophthalmitis in 35 eyes, choroidal bleeding in 20 eyes, retinal detachment in 60 eyes, and vitreous hemorrhage in 97 eyes. Post-opera-tively, out of 188 eyes, except for 3 of patients too young to examine, visual acuity improved in 133(70.7%), including 85(45.2%) with visal acuity 0.02-1.0, 46(24.5%) remained unchanged; and 9(4.8%) had worse vision. Among 34 with no-light-perception, 12 had light-perception or over. Conclusion A majority of severe trauma eyes can be salvaged with considerable visual recovery after adequate and timely vitreous surgery. (Chin J Ocul Fundus Dis,1999,15:4-6)
Objective To investigate the ingestion, metabolism and subcellular localization of indocyanine green (ICG) in human retinal epithelial (R PE) cells.Methods RPE cells were incubated with 0.25 mg/ml ICG under the condition of 37oC in the camera. The ICG granule and ultrastructure of RPE cells were observed under the electron microscopy after 1, 4, and 24hour incubation, and the ICG autofluorescence was detected by fluorescence microscopy after the incubation for 1, 2, 4, 8, 12, 24, and 48 hours, respectively. The ab sorbency (A value) of ICG solution was measured at 805 nm with ultraviol et/v isible specrtrometer. The standard curve of concentration of ICG was drawn and the related equation of concentration of ICG and the A value was calculated. After being incubated for 1, 2, 4, 8, 12, 24, 48, and 72 hours, respectively, the A value of supernatant fluid was calculated according to the equation. Aft er incubated with ICG for 24 hours, one sample was observed under electron microscope and fluorescence microscope per week to evaluate the metabolizable period of ICG .Results ICG granules were distributed evenly after entering the RPE cells. After incubated with 0.25 mg/ml ICG for 24 hours, no significant change of the ultrastructure of the RPE cells was found. ICG granules accu mulated in the cells as the time goes by and reached the peak after 24 hours, and then they decreased because of the slowdown of the metabolism. Few ICG was still remained in the cells 1 week later Conclusions RPE cells may take in ICG actively. ICG metabolizable period in RPE cells is long, which may be one of the mechanisms of the toxicity of ICG to the retina in the vitreous operation.(Chin J Ocul Fundus Dis，2004，20：179-181)
Objective To measure optic disc parameters in Mongolian and Han healthy subjects with or without family history of glaucoma, to explore the causes of the differences and their significance in the diagnosis of early glaucoma. Methods Fifteen healthy Mongolian individuals (30 eyes), 30 healthy Han individuals (60 eyes) with a family history of open-angle (30 eyes) or angle-closure (30 eyes) glaucoma, and 45 healthy Han individuals (90 eyes) without a family history of glaucoma were enrolled in this study. The 45 healthy Han individuals without a family history of glaucoma included three age-groups: 20 to 29 years old group, 30 to 39 years old group and 40 to 49 years old group, each group have 15 subjects (30 eyes). Thirteen parameters were measured by Heidelberg retina tomography (HRT) for all subjects, including disc area, cup area, rim area, cup volume, rim volume, cup/disc area ratio, linear cup/disc ratio, mean cup depth, maximum cup depth, cup shape, disc height variation contour, mean retinal nerve fiber layer (RNFL) thickness and optic nerve fiber layer crosssectional area. The results were analyzed and compared between the above groups. Results There was no statistically significant (t=0.791,P=0.132) of the height variation contour between Mongolian and Han without a family history of glaucoma (20 to 29 years old) group. The other parameters of Mongolian were smaller than Han without a family history of glaucoma (20 to 29 years old) group, but the difference was not statistically significant (t=-1.039, -0.799, -0.840,-1.108, -0.956, -0.695, -0.931, -1.099, -1.074, -0.580, -0.204, -1.425; P＞0.05). The parameters in Han with a family history of open-angle glaucoma group were bigger than Han without a family history of glaucoma (30 to 39 years old) group. The differences were statistically significant for disc area, cup area, rim area, cup volume, rim volume, cup area ratio, linear cup/disc ratio, mean cup depth, cup shape measure, nerve fiber layer cross-sectional area (t=4.758, 3.187, 2.544, 2.674, 1.798, 3.676, 2.721, 2.715, 2.510, 2.373; P＜0.05), but were not statistically significant for maximum cup depth, disc height variation contour and mean RNFL thickness (t=1.649, 1.565, 0.767; P＞0.05). Most parameters in Han with a family history of angle-closure glaucoma group were the same as that in Han without a family history of glaucoma (40 to 49 years old) group, including cup area, rim area, cup volume, rim volume, cup/disc area ratio, linear cup/disc ratio, mean optic cup depth, maximum cup depth, cup shape, disc height variation contour, mean RNFL thickness, optic nerve fiber layer cross-section (t=1.201, 1.697, 1.000, 0.516, 0.740, -0.172, -0.070, -0.972, 1.530, -0.390, -0.091, 0.659; P＞0.05); but the difference of disc area between these 2 groups was statistically significant (t=2.224,P＜0.05). Conclusions The family history of glaucoma can change the optic disc parameters of healthy individuals, especially those with a family history of open-angle glaucoma. There is no difference of optic disc parameters between healthy Mongolian and Han subjects.
ObjectiveTo objectively quantitative assess the visual quality in patients with myopic foveoschisis (MF) using a double-pass optical quality analysis system (OQASⅡ). MethodsSixty-two subjects participated in this cross-sectional, observational study, who were divided into three groups based on the pathologic conditions including myopic foveoschisis group (MFG), myopic control group (MCG) and normal control group (NCG). Measurements with OQASⅡwere performed for the modulation transfer function cut off frequency (MTF cut-off), the Strehl ratio (SR) and the objective scatter index (OSI). Visual data were analyzed using ANOVA and Pearson's correlation accompanied by logMAR BCVA and axial length (AL). ResultsThe mean values for MTF cut-off, SR and OSI of MFG, MCG and NCG were 18.18±4.81, 0.13±0.03, 3.50±0.44; 22.87±2.66, 0.14±0.02, 2.42±0.29; 33.68±4.70, 0.23±0.02, 1.68±0.20 respectively, and statistical difference were proved except SR between MFG and MCG, or BCVA between MCG and NCG (P < 0.05). LogMAR BCVA and AL have negative correlations to MTF cut-off (r=-0.928, -0.658; P < 0.05) and SR (r=-0.577, -0.893; P < 0.05) with high coefficients in MFG. Log MAR BCVA has negative correlations to MTF cut-off and SR (r=-0.659, -0.806; P < 0.05) in MCG. Log MAR BCVA has negative correlations to MTF cut-off and SR (r=-0.606, -0.602; P < 0.05) and positively correlated to OSI (r=0.561, P < 0.05) in NCG. ConclusionsThe mean value of BCVA, MTF cut-off, SR, OSI of myopic foveoschisis patients were lower than those myopic patients without foveoschisis and normal people. there exists a significant negative correlation between Log MAR BCVA, AL to MTF cut-off and SR. Compared with myopic and normal subjects, myopic foveoschisis have lower BCVA, MTF cut-off, SR but higher OSI.
Objective To establish a method for primary culture of iris pigment epithelial cells(IPE). MethodsEnzyme-Assisted microdissection was used to isolate and cultivate the IPE cells.An identification was made with microscopic and immunohistochemical observations.Results IPE were successfully sultured and showed on differences with RPE in primary culture and subculture.ConclusionEnzyme-Assisted microdissection is a reliable and quick method for the isolation of IPE.
In order to investigate the mechanism of blood supply to the delayed separated skin flap and the time and criteria for its transfer, 5 smallsized Banna pigs were selected to produce 14 skin flaps. In the experimental group the skin flap on one side was made from the middle of the back having an extrathin steel sheet intervened between the flap and the soft tissue of the back whereas the flap on the opposite side without a steel sheet intervened was served as the selfcontrol. The skin flaps were examined 3,7,10 and 20 days after the operation and 3,7 and 10 days after transfer, respectively, by (1) gross observation; (2) ultrasonic Doppler; (3) superficial skin temperature measurement and; (4) histomorphological examination. In the experimentalgroup the survival rate of the flap was 100 percent whereas in the control group all of the flaps had necrosis from 30 to 50 percent after the flap being transfered. In the experimental group, the echo sound from the arterial blood flow from ultrasonic Doppler was heard at the pedicle 7 days after the operation, and as time elapsed, the echo sound spread distally, whereas in the controls no echo sound could be heard over the skin flap. There was significant difference statistically between the experimental and control groups in the temperature of the flaps while the flaps were being transferred (P lt; 0.01). The external diameters of the blood vessels in the central area of the skin flap were larger in the experimental group, 0.8 to l.2mm in comparison to 0.4mm.