Diabetic macular edema (DME) is a common ocular complication of diabetes patients. It mainly involve macular which is closely related with visual function, thus DME is one of the major reasons causing visual impairment or blindness for diabetes patients. How to reduce the visual damage of DME is always a big challenge in the ophthalmic practice. In the past three decades, there are tremendous developments in DME treatments, from laser photocoagulation, antiinflammation drugs to antivascular endothelial growth factor therapy. However, the mechanism of DME development is not yet completely clear; every existing treatment has its own advantages and weaknesses. Therefore DME treatment still challenges us to explore further to reduce the DME damages.
Objective
To investigate the early effects of intervention with tanakan on retinal function in diabetic retinopathy(DR) after laser photocoagulation.
Methods
Prospective random controlled study was performed on 60 Patients (60 eyes) from 23 to 69 years old with DR(phase Ⅲ～Ⅳ). The multifocal electroretinograms (MERG) were tested with VERIS Ⅳ before, the 3rd day and the 7th day after photocoagulation.
Results
No significant differences were found in the latencies and response densities of N1,P1 and N2 between the two groups before photocoagulation. Compared with that before photocoagulation, three days after photocoagulation the latencies in tanakan group had no significant change. The response densities of N1,P1 and N2 reduced and the changes were much smaller than that in control. Three days after photocoagulation, the response densities of P1 and N2 in the central macula 5°area were much higher and the latencies of P1 and N2 were significantly shorter than that in control group. There were no significant differences in the response densities in the 7th day and the differences in the latencies between two groups still existed.
Conclusion
Tanakan may be effective in preventing the retina from damage of retinal photocoagulation in some degree in DR.
(Chin J Ocul Fundus Dis, 2002, 18: 208-211)
PURPOSE:To evaluate the therapeutic effect of argon laser photocoagulation on choroidal osteoma.
METHODS:Six cases (7 eyes)of choroidal osleoma were treated with argon laser photoeoagulation. The pre and postoperative visual aeuity,fundus appearance and fundus fluorescein anglography(FFA)were observed. The average period of follow up was 23 months.
RESULT:The visual acuity of all patients was unchanged. Choroidal osteomas in 3 patlents ( 3 eyes)were flattened. The EFA showed that choroidal vaseulature disappeared in one eye.
CONCLUSION :Multiple sessions of photocoagulation may cause decalcification of choroidal ostema and ]imitation of growth of the tumors awing to destroying the choroid blood vessel by pholoeoagulation in the area of tumor and around it.
（Chin J Ocul Fundus Dis,1997,13: 204-206）
To observe the efficacy of intravitreal injection of conbercept (IVC) combined with panretinal laser photocoagulation (PRP) in the treatment of diabetic retinopathy (DR) combined with stage I and II neovascular glaucoma (NVG).MethodsA clinical case-control study. From October 2013 to March 2019, 50 eyes (50 patients) with DR and stage Ⅰ to Ⅱ NVG diagnosed in the Department of Ophthalmology, Peoples's Hospital of Xianghe were were included in the study. There were 27 eyes (27 males) and 23 eyes (23 females); all patients were monocular with the average age of 53.5±7.13 years old. Stage Ⅰ and Ⅱ NVG were 11 and 39 eyes, respectively. All patients underwent BCVA, intraocular pressure, and fundus angiography. The BCVA examination adopted the international standard visual acuity chart, which was converted to logMAR BCVA visual acuity in statistics. The patients were divided into the Conbercept+laser therapy (combination therapy) group and the laser therapy group by random number table, with 25 eyes. The age of the two groups of patients (t=0.058), gender composition ratio (χ2=0.081), logMAR BCVA (t=0.294), intraocular pressure (t=－0.070), the number of eyes with different grades of angle and iris neovascularization（χ2=1.683, 0.854）were compared, the difference was not statistically significant (P＞0.05). The changes of BCVA, intraocular pressure, iris neovascularization, and angular neovascularization were compared and observed between the two groups one week after the completion of PRP treatment, 1, 3, 6, and 9 months. Independent sample t test was used for continuous variables. Between the combination treatment group and the laser treatment group, at different time points within the two groups and the interaction of the two factors, a single-factor repeated analysis of variance was used.ResultsCompared with the results before treatment, the combined treatment group and laser treatment group had statistically significant differences in the number of angle and iris neovascularization, intraocular pressure and logMAR BCVA at different times after treatment in the combined treatment group and laser treatment group (F=124.211, 65.153, 69.249, 26.848; P＜0.001). After treatment, the combined treatment group was better than the laser treatment group in terms of the regression of eye angle and iris neovascularization, intraocular pressure and logMAR BCVA, and the difference was statistically significant (F=47.543, 25.051, 12.265, 9.994; P=0.001, 0.001, 0.001, 0.003). At different times after treatment, compared with the laser treatment group, the number of neovascularization in the iris and angle of the eye in the combined treatment group was less, the intraocular pressure was significantly decreased, and the BCVA was increased. The difference was statistically significant (P＜0.05).ConclusionThe efficacy of Kang IVC combined with PRP in the treatment of DR with stage Ⅰ and Ⅱ NVG is better than that of PRP alone.
Objective：To observe the therapeutic ef fect of chemoreduction treatm ent combined with local focal therapy for advanced intraocular retinoblastoma (R B).
Methods：Thirteen eyes of nine patients with RB underwent c hemoreduction tr eatment combined with local cryotherapy and (or) transpupillary thermotherapy (TTT), and the clinical data of the patients were retrospectively analyzed. The vi ncristine, etoposide, and carboplatin (VEC) were used in the chemoreduction trea tment. The average followup duration was 15.3 months.
Results：All of the 13 e yes with RB had favorable initial reaction in the treatment of chemoreduction. A fter the first period of chemotherapy, the largest diameter of the tumor fundus decreased 37.2%, and the tumor thickness averagely reduced 46.7%. The subretinal fluid was absorbed completely or partially in 6 eyes (6/8); vitreous and subret inal seeds reduced, disappeared or calcified in 10 (10/11) and 11 eyes (11/11), respectively. During the treatment and in the followup duration, 8 eyes (8/13) had new tumors and (or) recurrences. Finally, 2 eyes (2/13) were enucleated whil e 11 eyes (11/13) were saved in which 8 (8/11) recovered or remained good visual acuity. None of 9 patients had serious side effects of chemotherapy like leucoc ythemia, functional damage of liver and kidney, and dysacousia.
Conclus ions：Chem oreduction treatment has well initial effect on advanced RB. Chemoreduction trea tment combined with local treatment may effectively control the retinal tumor, s ubretinal seeds and vitreous seeds within a shortterm duration. The evaluation of longterm effect of the treatment needs further observation.
Objective The present study focus on the macular branch retinal vein occlusion (MBRVO) with and without laser treatment,and evaluate prospectively whether laser treatment is useful in improving the visual acuity and reducing the macular edema. At the same time to learn the difference of macular light sensitivity before and after laser treatment.Methods Forty-five eyes of forty-five patients with MBRVO and macular edema were randomized to laser treatment and no laser treatment. Follow up examinations were performed every 3 months. We compared the difference of visual improvement, resolution of macular edema between the two groups. The central 30°visual field of 20 patients with MBRVO were examined at pretreatment and 3 months after laser treatment. A comparison of light sensitivity at fovea ，central 10°and 11~30°eccentricity were done between before and after laser treatment. Results Comparison of visual improvement and resolution of macular edema showed a statistical difference between laser treatment and no laser treatment. The mean reduction of macular light sensitivity at the fovea and 11~30°3 months after the treatment has no statistical difference between before and after treatment (Pgt;0.05). But the mean light sensitivity at central 10°eccentricity were significantly decreased 3 months after photocoagulation (Plt;0.05).Conclusion The laser treatment might promote or accelerate visual acuity recovery and reduce the macular edema. There is no significant difference about the efficiency on macular function after laser treatment.(Chin J Ocul Fundus Dis，2003，19：201-268)
