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find Keyword "Optical coherence tomography" 5 results
  • 先天性黄斑缺损的光相干断层扫描检查

    Objective To investigate the characteristic of OCT images of congenital macular coloboma and its utility in the diagnosis of the diseases. Methods Seven patients (9 eyes) with congenital macular coloboma who had been examined by visual acuity determination, slit lamp examination, ophthalmoscope and fluorescein angiography received OCT scan and fundus color photography. The results were retrospectively analyzed. Results The manifestation of congenital macular coloboma by OCT was the retinal and choroidal tissues focally pitted outwards along with sclera. The 3 dimensions of pit: horizontal diameter 668 - 4 339mu;m (3 119 in average), vertical length 668 - 4 531 mu;m (2 591 in average), pits depth 230 - 2 146mu;m(1 084 in average).The retinal neurosensory layer became thin and defect. And the retinal neurosensory layer was thinner in the centre than that near the edge. Reflection of retinal pigment epithelium was uneven and discontinued. The dark area of choroid was enlarged. Conclusions It can be clearly shown by OCT that abnormal structure of retina and out layer of choroid in congenital macular coloboma. It is implied that the characteristic of OCT is helpful in the diagnosis of congenital macular coloboma. (Chin J Ocul Fundus Dis, 2005,21:97-99)

    Release date:2016-09-02 05:52 Export PDF Favorites Scan
  • Clinical characteristics and features of images of optical coherence tomography in vitreomacular traction syndrome

    ObjectiveTo observe the characteristics of the images of optical coherence tomography (OCT) performed on the patients with vitreomacular traction syndrome and its clinical significance.MethodsThe clinical data of 25 patients with vitreomacular traction syndrome diagnosed by OCT, fundus fluorescein angiography, and B-scan ultrasonography and confirmed by surgical treatment were retrospectively analyzed. The features of images of OCT in vitreomacular traction syndrome were observed.ResultsFive types were found in the images of OCT in the patients with vetreomacular traction syndrome. The main characteristic of the images of OCT in the patients with vitreomacular traction was the highly reflective band of the vitreous posterior cortex inservion at fovea. In 25 patients, vitreomacular traction associated with macular edema was found in 10, macular hole in 3, macular epiretinal membrane in 6, retinoschisis in 1, and retinal detachment in 5.ConclusionOCT is a potential powerful toll for detecting and monitoring vitreomacular traction syndrome. (Chin J Ocul Fundus Dis, 2005,21:86-89)

    Release date:2016-09-02 05:52 Export PDF Favorites Scan
  • Changes of macula in patients with high myopia after phacoemulsification

    ObjectiveTo observe the changes of macula in patients with high myopia after phacoemulsification. MethodsIn 20 patients with high myopia with ocular axial length≥27 mm, optical coherence tomography (OCT) was performed on the operative and contralateral eyes 1 week before and after monocular phacoemulsification, respectively, and the OCT images of macula of the operative eyes were observed and compared.ResultsOne week before and after phacoemulsification, the mean macular fovea thickness of the patients with high myopia was (131.6±16.37) μm and (189.75±45.69) μm, respectively, with a significant difference (t=2.805, P=0.01). Simultaneously, the mean macular fovea thickness of the contralateral eyes was (133.5±15.12) μm and (133.5±14.63) μm, respectively, with a non-significant difference (t=1.367, P=0.853). In 20 operative eyes 1 week after phacoemulsification, 3 had vitreous strand around the macula with retinal thickening, 1 had retinoschisis in macular area, and 2 had obvious retinal thickening with slight retinal edema.ConclusionRetinal thickening occurs in the patients with high myopia after phacoemulsification. Traction of retina by vitreous strand or subclinical retinoschisis may occur in some patients.(Chin J Ocul Fundus Dis, 2005,21:90-92)

    Release date:2016-09-02 05:52 Export PDF Favorites Scan
  • Relationship between the macular histomorphological changes and the prognosis of the visual acuity in eyes with retinal detachment

    ObjectiveTo invesitigate the relationship between the macular histomorphological changes and the prognosis of the visual acuity (VA) in eyes with rhegmatogenous retinal detachment (RRD).MethodsOptical coherence tomography (OCT) was performed on 39 patients (39 eyes) with rhegmatogenous retinal detachment. According to the macular neurepithelial configuration displayed by OCT, the patients were divided into 3 groups: neurepithelial edema group, neurepithelial detachment group, and neurepithelial cystoid degeneration group. The time of retinal detachment, pre- and post-operative VA, and macular neurepithelial thickness OCT images were observed and analyzed statistically.ResultsThere was no difference of pre-operative VA among the three groups (P>0.05). Significant differences of post-operative VA, time of retinal detachment, and neurepithelial thickness were found (P<0.05). The differences of time of retinal detachment and neurepithelial thickness between neurepithelial degeneration group and cystoid degeneration group were significant (P<0.05) except the postoperative VA (P>0.05).ConclusionsThe time of retinal detachment and post-operative VA in patients with retinal detachment relate to the neurepithelial thickness detected by OCT. When the duration of retinal detachment becomes longer, the macular neurepithelium becomes thicker, the histomorphological changes increase, and the post-operative VA decreases. (Chin J Ocul Fundus Dis, 2005,21:83-85)

    Release date:2016-09-02 05:52 Export PDF Favorites Scan
  • Characteristics of optical coherence tomography for several common diseases which could lead to submacular choroidal neovascularization

    ObjectiveTo observe and classify the characteristics of optical coherence tomography (OCT) for several common diseases which could lead to submacular choroidal neovascularization (CNV), and to provide the warrant to make the differential diagnosis and treatment of CNV.MethodsThe data of OCT of 165 patients (187 eyes) with CNV due to AMD, CEC, high myopia and ICNV diagnosed by fundus photography and fundus fluorescein angiography (FFA) were retrospectively analyzed, and the images of OCT were classified considering the results of FFA, and the characteristics of different types of the images were sumerized.ResultsWell-defined fusiform thickening of retinal pigment epithelial (RPE) and choriocapillary layer in CNV with well-defined border (60 eyes), dispersed backscattering increase in poorly-defined CNV (101 eyes), optic darkspace beneath RPE layer in serous detachment of RPE layer (19 eyes), quickly decreased high backscattering region under RPE layer in hemorrhagic detachment of RPE layer (11 eyes), slight to moderate backscattering region between RPE layer in fibrovascular detachment of RPE layer (10 eyes), and detachment of neurepithelial layer from RPE layer with the optic darkspace between the layers in detachment of neurepithelial layer (45 eyes) were observed.ConclusionsThe images of OCT for the common diseases which could lead to submacular choroidal neovascularization may be divided into 6 types. Analyzing the characteristics of images of OCT is helpful in differential diagnosis and treatment of CNV. (Chin J Ocul Fundus Dis, 2005,21:69-73)

    Release date:2016-09-02 05:52 Export PDF Favorites Scan
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