ObjectiveTo explore the effects of vitrectomy on neovascular glaucoma combined with vitreous hemorrhage.MethodsSeven eyes of 7 patients with neovascular glaucoma combined with vitreous hemorrhage underwent vitrectomy combined with phacoemulsification, panretinal photocoagulation, and trabeculectomy. The preoperative visual acuity ranged from light perception to 0.2, and the mean preoperative intraocular pressure was 54 mm Hg (38-64 mm Hg)(1 mm Hg=0.133 kPa). The mean follow-up was 8 months (6-15 months).ResultsThe postoperative visual acuity ranged from light perception to 0.4, and the mean postoperative intraocular pressure was 17 mm Hg (10-30 mm Hg) which was significantly lower than preoperative one (Plt;0.05). The postoperative complications mainly included fibrosis exudates in anterior chamber (7 eyes), intraocular pressure elevation 1-2 weeks after the operation (2 eyes), and postoperative suprachoroidcavity hemorrhage (2 eyes).ConclusionVitrectomy combined with phacoemulsification, panretinal photocoagulation, and trabeculectomy may be effective procedures for some cases of neovascular glaucoma combined with vitreous hemorrhage.(Chin J Ocul Fundus Dis, 2005,21:148-149)
Objective To investigate the clinical characteristic of ocular fundus complications in systemic lupus erythematosus (SLE). Methods In 25 cases of SLE with the ocular fundus complications, the ocular fundus, the other ocular tissues, general lesions，and antinuclear antibody (ANA ), anti-double-stranded DNA（anti-dsDNA）, complement 3 (C3), complement 4 (C4)and erythrocyte sedimentation rate(ESR) were analyzed retrospectively. Results In the 25 cases, “classic” SLE retinopathy in 15 (25 eyes), retinal vein occlusion (RVO) in 9 (12 eyes), RVO combined with retinal arter y occlusion in 1 (2 eyes), exudative retinal detachment in 1 (2 eyes), vitreous hemorrhage combined with neovascular glaucoma in 1 (1 eye), and optic discedem a except RVO in 3 (6 eyes) were found. Nine cases accompanied with other ocular signs and 21 with general lesions. Positive ANA and anti-dsDNA and elevated ESR in all of the patients, decreasing C3 in 19, and C4in 17 were found.Conclusions SLE can cause serious ocular fundus complications accompanied with other ocular signs. Regular ophthalmic examination should be performed on the patients with SLE to detect and treat the ocular complications promptly. (Chin J Ocul Fundus Dis，2004，20：206-208)
Objective To observe the changes of electroretino gram(ERG) in temporary traumatic ocular hypotension and to detect the possiblem echanism. Method The rabbit model with ocular hypotenstion was made. At the 2nd, 4th, 8th, 16th week after trauma, the ocular tension and ERG was examined. Result Amplitude of b wave in treated group was 2.5 times as high as that in the control at the 2nd week after trauma, and then decrease to 1.5 times as high as that in the control at the 16th week. Conclution Higher amplitude of b-wave of ERG in rabbit with ocular hypotension may be related to blood circulation congestion, which might lead to accumulation of the metabolic toxin. (Chin J Ocul Fundus Dis，2004，20：189-191)
Objective
To evaluate the visual results,surgical tec hnique and safety of secondary intraocular lens (IOL) implantation in aphakic eyes following vitrectomy and lensectomy for complicated ocular trauma or retinal detachment．
Methods
The clinical records of 3 2 cases (32 eyes),received these surgeries during November 1996 and December 1999,were reviewed retrospectively.During the secondary operation，intraocular infu sion through the pars plana was performend and the type of IOL was chosen based on the integrity of lens capsule.
Results
The study included 30 eyes suffering from trauma (foreign bodies in 15 eyes,penetrating injury with traumatic endophthalmitis and with vitreous hemorrhage in 6 eyes respectively, blunt trauma with lens dislocation in 3 eyes),and 2 eyes with primary retinal detachment.Those eyes all received vitrectomy,lensectomy,and/or remova l of foreign bodies and corneal suture.The interval of two operations ranged from 1 to 16 months with an average of 6.8plusmn;3.7 months.Posterior chamber IOL was implanted in the ciliary sulcus in 25 eyes with a whole or 2/3 of lens capsule,trans scleral suture fixation of IOL in 5 eyes,anterior chamber IOL and IOL with artificialiris in one eye respectively.Silicone oil was removed in 5 eyes duri ng the secondary operation.Post-operative visual improvement was achieved in 29 eyes.Main complications were corneal edema and low intraocular pressure after operation.
Conclusion
Intraocular infusion and proper IOL implantation during the secondary operation following vitrectomy can provide selected aphakic eyes with better visual recovery.
(Chin J Ocul Fundus Dis, 2001,17:96-98)
Objective
To further investigate pathologic mechanism of retinal phototrauma.
Methods
Twenty Wistar rats were divided into control and experimental groups.Their eyes were extracted in 12，24 and 36 hours after light exposure.HE stained retina samples were examined and TDT-mediated dUTP nick end labelling(TUNEL)method was employed to distinguish apoptotic cells.
Results
After 12-hour light exposure,slight vesiculation was observed in the rod outer segment of the retinas.After 24-hour light exposure,the outer nuclear layer showed predominant fractured and condensed nuclei and fragmented DNA.After 36-hour light exposure,the rod outer and inner segments were lysed and most of the nuclei in the outer nuclear layer were disappeared.
Conclusions
Apoptosis of photoreceptor cell is one of the important mechanisms which cause experimental retinal photoinjury of rats.
(Chin J Ocul Fundus Dis, 1999, 15: 167-169)
efect of the eyebrow is a common facialdefect. It was resulted from a variety of causes,but the most common was burn. The operationby using free postauricular scalp graft to repairthe defect of eyebrow was intreduced. The var-ious metheds of eyebrow reconstruction werecompared. The treatment of 79 patients with thedefect of eyebrow was summarized. It was notedthat it had the following advantages , such as theoperation being simple and easy, a naturallooking, appropriate density and r...
Objective To evaluate the therapeutic effect of vitreo-retinal surgery on oclular siderosis. Methods The clinical data of 22 patinets (22 eyes) with ocular siderosis due to the magnetic foreign body at intraocular postsegment were retrospectively analyzed. The patients aged from 6 to 54 years (average 40 years), including 21 males and 1 femal. The duration of the magnetic foreign body remained in the eye lasted for 1 month to 20 years. The preoperative best corrected visual acuity (BCVA) was ＜0.01 in 15 eyes, 0.01-0.15 in 5 eyes and 0.1-0.2 in 2 eyes. There was Intra-vitreous foreign body in 18 eyes and ocular wall embedded foreign body in 4 eyes; intraocular foreign body (IOFB) combined with cataract in 18 eyes; combined with retinal detachment in 3 eyes; scleral buckling combined with silicon oil filled in 12 eyes and C3F8 filled in 7 eyes. Cataract extraction was performed in 12 eyes, and 2 eyes underwent filtrating surgery. Results The IOFB was successfully removed by one-off surgery in 22 eyes. BCVA increased in 20 eyes (90.9％) and kept unchanged in 2 eyes (9.1%), including＜0.1 in 7 eyes, 0.1-0.4 in 8 eyes, and 0.5-1.0 in 7 eyes. Operative complications involved retinal holes with retinal detachment in 2 eyes and vitreous haemorrhage secondary to enlarge sclera incision in 2 eyes. Postoperative complications included secondary cataract in 4 eyes, retinal detachment due to silicon oil removal 3 months after submacular removal of foreign body in 1 eye, and retinal detachment 7 days after C3F8 filling in 1 eye; the latter two eyes had reattached retina after another silicon oil filling. At the end of the follow-up period, retina reattached in 22 eyes. Conclusion Advanced modern vireoretinal operation is effective on oclular siderosis, which can avoid the release of Fe+ and improve the patientsprime; visual function.
The eye-computer interaction technology based on electro-oculogram provides the users with a convenient way to control the device, which has great social significance. However, the eye-computer interaction is often disturbed by the involuntary eye movements, resulting in misjudgment, affecting the users’ experience, and even causing danger in severe cases. Therefore, this paper starts from the basic concepts and principles of eye-computer interaction, sorts out the current mainstream classification methods of voluntary/involuntary eye movement, and analyzes the characteristics of each technology. The performance analysis is carried out in combination with specific application scenarios, and the problems to be solved are further summarized, which are expected to provide research references for researchers in related fields.
Objective To test the hypothesis that the macular pigment may be a marker of foveal cone function and consequently the structural integrity of foveal cones.Methods Sixteen patients (32 eyes) diagnosed to have Stargardt dystrophy and three patients with full thickness macular holes by clinical criteria were studied with a scanning laser ophthalmoscopy (SLO) comparing argon laser blue and infrared images for the presence or absence of macular pigment (MP) in the fovea. An C++ computer based program was used to evaluate the density of MP. Eyes were graded into three categories: those without foveal macular pigment, those with partial pigment and those with normal amounts of macular pigment. These categories were compared with visual acuity determined by the Snellen chart. Results Thirteen eyes with a visual acuity of 20/200 or worse had no macular pigment in the fovea. Eleven eyes with visual acuity of 20/40 or better had a normal amount of macular pigment in the fovea and 1 eye had partial macular pigment. Eleven eyes with partial macular pigment had intermediary acuity value.Conclusions Foveal macular pigment is closely related to foveal cone acuity and therefore may be a marker for the presence of foveal cones. Infrared light is a sensitive indicator of early macular diseases.(Chin J Ocul Fundus Dis，2003，19：201-268)
OBJECTIVE:To investigate the diagnostic meaning of MRI in intraocular tumors.
METHODS:Forty-six cases of confirmed intraocular tumors,including choroidal melanoma(20 cases),retinoblastoma(18 cases),Coats disease(6 cases)and choroidal hemangioma(2 cases),were studied with MRI and compared with ultrasonography and CT.
RESULTS:In making discoveries about intraocular tumors,there were no sighificant difference between MRI and B-ultrasonography or CT （P＞0.03，chi;2=1.0716）while there were highly statistic sighificance in dediding characters and position （P＜0.01，deceding character chi;2=29.8314，positionchi;2=13.659）of them.
CONCLUSION:Among the examinations to find out about the position,character and secondary pathological insults of in traocular tumors MRI might be more available than CT and ultrasonography.
（Chin J Ocul Fundus Dis,1997,13:93-95 ）
