Objective To evaluate the effects of retinal cryotherapy and intravitreal triamcinolone injection to treat Coatsprime; disease with exudative retinal detachment.Methods This was a prospective consecutive case study, and 21 patients (21 eyes) with Coatsprime; disease accompanied by exudative retinal detachment were enrolled. There were 19 males and two females patients, aged from two to 18 years. Fifteen eyes had partial retinal detachment (stage 3A) and six eyes had total retinal detachment (stage 3B). All patients underwent cryocoagulation and intravitreal triamcinolone injection. Three eyes underwent sclerotomy to drain subretinal fluid. Four eyes underwent further treatment by photocoagulation or cryotherapy for the residual abnormal blood vessels after the surgery. The follow-up ranged from three to 15 months with an average of seven months. Visual acuity, intraocular pressure, eye position and eye movements, slit lamp microscope, indirect ophthalmoscope and color fundus imaging were followed up. The last followup time was considered as the judgment time for the therapeutic effects. Results Six eyes had increased intraocular pressure after the surgery, which was controlled by local drug treatment. At the end of follow-up, 19 eyes had reattached retina, one eye had partial retinal detachment and one eye had total retinal detachment. The vision improved in three eyes,unchanged in 14 eyes, and decreased in two eyes. Other complications included strabismus (one eye) and cataract (four eyes). Conclusion The combined treatment of cryotherapy and intravitreal triamcinolone injection is an effective therapy for the Coatsprime; disease with exudative retinal detachment, as retina reattaches and visual function is saved in most patients after this treatment.
Objective By using a newly developed animal model of limited macular translocation (LMT) in rabbit eyes, to explore the complications,indications and predictability of LMT. Methods LMT models were performed in 15 rabbit eyes, and were divided into 4.5 mm group and 3.5 mm group by the length of scleral shortening.The effect of retinal translocation (distance and direction) and its complications were analyzed. In a separated group, postoperative corneal astigmatism was studied after release of scleral shortening suture 1 month after LMT. In order to study the impact of neuroretina-retinal pigment epithelium (RPE) adhesion on LMT, retinas and choroids in 4 pigmented rabbit eyes were pretreated with photocoagulation. Results Success rate of LMT was 86.7%. In these cases, retinal translocations were achieved［(distance of 610 to 2690 μm, [AKx-]±s=(1395±636)μm; translocation angle α of 10-38°, [AKx-]±s=(22.7±8.3) °］. The difference in scleral shortening between 4.5 mm and 3.5 mm groups did not significantly influence the final translocation. Major complications of LMT included intraocular bleeding, retinal break, and corneal astigmatism. Release of scleral shortening suture reduced corneal astigmatism and made it more regular, meanwhile, retinal translocation did not regress. The neuroretina-RPE adhesion induced by retinal photocoagulation made neuroretinal hydrodissection difficult, and led to retinal break readily. Conclusion Sufficient LMT models in rabbit eye were obtained with few postoperative complications. Direction of retinal translocation is an important factor influencing the effect of LMT, except for distance. Release of scleral shortening suture can effectively reduce corneal astigmatism without causing regression of retinal translocation. For the patients with a history of macular or para-macular photocoagulation, LMT should be performed carefully. (Chin J Ocul Fundus Dis, 2002, 18: 203-207)