Objective To observe the imaging features of ultra-wide field short wave fundus autofluorescence (SW-FAF) in eyes with multiple evanescent white dot syndrome (MEWDS), and analysis the correspondence to conventional images. Methods It was a retrospective case series study. Thirteen patients (14 eyes) diagnosed with MEWDS were enrolled. There were 12 females and 1 male, aged from 22 to 57 years, mean age was 34.5 years. All the eyes underwent fundus color photography, optical coherence tomography (OCT) and ultra-wide field autofluorescence (FAF). Simultaneous fundus fluorescein angiography (FFA) and indocyanine green angiography (ICGA) were performed in 6 eyes. The characteristic changes of SW-FAF in studied eyes were observed and compared with the images of FFA and ICGA. All the eyes were followed up every 1 to 2 weeks, with an average of 16.7 weeks. The characteristic images of SW-FAF and corresponding OCT were studied during follow up. Results MEWDS presented with numerous multiple hyper-autofluorescent spots, sized from 50-500 μm, with a vague boundary in ultra-wide field SW-FAF. These spots located mainly at the peripapillary area and the posterior pole with a confluent pattern. The lesions extended to the mid-peripheral retina as well and became more scattered. The distribution of the hyper-autofluorescent lesions in SW-FAF corresponded roughly to that of the greyish-white spots seen in color photograph and the hyper-fluorescent spots detected by FFA. It was consistent with the distribution of hypo-fluorescent spots in late-phase ICGA as well. But the number of the spot showed in FAF is much more than that in FFA, and slightly less than that in ICGA. The OCT scans through the hyper-autofluorescent lesions in SW-FAF showed impairment of outer retina. After the recovery, the hyper-autofluorescent spots disappeared with the outer retina structure repaired completely. Conclusions MEWDS presented with numerous multiple hyper-autofluorescent spots which located mainly at the peripapillary area in ultra-wide field SW-FAF. The distribution of the hyper-autofluorescent lesions in SW-FAF corresponded roughly to color photograph, FFA and ICGA in late-phase. The OCT scans through the hyper-autofluorescent lesions in SW-FAF showed impairment of outer retina.
Retinal vein occlusion (RVO) is a vascular disease characterized by intraretinal hemorrhage, edema and hard exudation, which is caused by increased retinal vein pressure. OCT angiography (OCTA) has been widely used in the diagnosis of retinal vascular diseases including RVO by virtue of non-invasive, high resolution and stratified display of superficial, deep retinal vessels and quantification of retinal vessel density and non-perfusion area size. OCTA can provide information of retinal microvascular structure and blood perfusion under the condition of disease, it also can be used to evaluate the effect of treatment and changes of retinal circulation during the course of disease follow-up. Although OCTA cannot replace fundus angiography completely, it has brought us more information about the pathogenesis, disease progression and prognostic factors of RVO. It is believed that with the progress of technology, OCTA will bring us a new chapter in the study of retinal vascular diseases including RVO.
ObjectiveTo evaluate the changes in subfoveal choroidal thickness (SFCT) in amblyopic eyes.MethodsA evidence-based medicine study. Chinese and English as search terms for amblyopia and choroid was used to search literature in Wanfang, CNKI, and PubMed of National Library of Medicine. Incomplete or irrelevant literature and review literature were excluded. The literature was meta-analyzed using STATA 15.0. The weighted mean difference (WMD) and 95% confidence interval (CI) were selected as the estimated value of effect size, and subgroup analysis and sensitivity analysis were used to detect the source of heterogeneity.ResultsAccording to the search strategy, 75 articles were initially retrieved, and 15 articles were finally included for meta-analysis. A total of 650 patients with amblyopia, aged 3 to 65 years old, were included. The enhanced depth imaging technology of spectral domain optical coherence tomography was used to measure SFCT. The results of meta analysis showed that SFCT of amblyopic eyes was more effective than the contralateral eye (WMD=18.89 μm, 95% CI 14.81-22.98 μm, P＜0.001) and normal eyes were thicken (WMD=39.49 μm, 95% CI 33.88-45.09 μm, P＜0.001). There was no statistically significant difference in SFCT between anisometropic and strabismic amblyopia eyes (WMD=－5.03 μm, 95% CI －19.50-9.44 μm, P=0.495).ConclusionsThe SFCT of amblyopic eyes in amblyopic patients is thicker than that of the contralateral eye and normal eyes. There is no difference in SFCT between anisometropia and strabismus amblyopia.
Objective To observe the image features of high myopia with retinoschisis by spectraldomain optical coherence tomography (SD-OCT). Methods The clinical data of eight patients (eight eyes) of high myopia with retinoschisis were retrospective analyzed. All patients were diagnosed by SD-OCT (Topcon 3D-OCT 1000), had no macular holes and underwent vitrectomy including internal limiting membrane (ILM) peeling and gas tamponade. All patients also underwent visual acuity, refraction, premirror fundus examination and A/B mode ultrasound examination. Visual acuity and SD-OCT were followed up at one, three and six months after surgery. Before surgery, premirror fundus examination revealed shallow foveal detachment in 3/8 eyes, posterior scleral staphyloma in 7/8 eyes. SD-OCT showed concave arc stripes in 7/8 eyes, and outer retinoschisis in 8/8 eyes, middle or inner retinoschisis in 5/8 eyes and foveal detachment in 5/8 eyes. Results Six months after surgery, posterior retinoschisis disappeared in six eyes, foveal detachment still presented in one eye and parafoveal hole occurred in one eye. The corrected visual acuity improved from the 0.15 to 0.8 in one eye which had a restored continuous inner segment/outer segmen (IS/OS) line by SD-OCT. The corrected visual acuity improved from 0.01 to 0.1 in one eye, from 0.05 to 0.15 in one eye, not changed in five eyes. There was no continuous IS/OS line in those patients by SD-OCT. Conclusions SD-OCT shows a variety of morphological features of myopic retinoschisis which could be cured anatomically and functionally by vitrectomy combined ILM peeling. The continuity of IS/OS layer from SD-OCT could help to interpret the vision recovery after the operation.
Retinal vein occlusion (RVO) is one of the most common retinal vascular diseases causing blindness, macular edema (ME) is often secondary to it, which causes serious visual impairment to patients. Imaging biomarkers in the changes of retina and choroid of ME secondary to RVO (RVO-ME) have important clinical value in the evaluation of condition, curative effect and visual acuity prediction of patients with RVO-ME. Among them, the disorganization of the retinal inner layers, the integrity of external limiting membrane and ellipsoid zone, and the change of central macular thickness are reliable indexes to evaluate the prognosis of visual acuity; hyperreflective foci, subretinal fluid and intraretinal fluid can be used as important parameters to reflect the level of inflammation; prominent middle limiting membrane and paracentral acute middle maculopathy are the objective basis for judging the degree of retinal ischemia; the changes of choroidal vascular index and choroidal thickness also have potential advantages in evaluating the progress of the disease. Accurately grasp the characteristics of biological markers of RVO-ME related optical coherence tomography is conducive to its reasonable and accurate use in the clinical diagnosis and treatment of RVO-ME, and helpful to further explore the pathogenesis of the disease.
ObjectiveTo investigate the correlation of visual sensitivity, best corrected visual acuity (BCVA) and central retinal thickness (CRT) in diabetic macular edema (DME).MethodsA retrospectives study. Forty-five eyes of 30 patients in DME were included. There were 20 eyes of 16 males, 25 eyes of 14 females, with an average age of 54.49±7.45 years. All the patients had type 2 diabetes; the average duration of diabetes was over 10 years. The BCVA examination was performed using the international standard visual acuity chart, which was converted into logarithmic logarithm (logMAR) visual acuity. The following parameters provided by the MAIA microperimetric device were evaluated, including average threshold (AT), macular integrity index (MI), fixation indexes (P1 and P2), bivariate contour ellipse area (BCEA) for 63% and 95% of points, and horizontal and vertical axes of the ellipse of fixation (H63, H95, V63, V95). The CRT was measured and the integrity of the ellipsoidal band was observed by optical coherence tomography (OCT). The integrity of the ellipsoid band was divided into continuous smooth (group A): fully visible; part of the light band was interrupted (B group): not completely visible; missing light band (C group): completely invisible. Pearson correlation analysis was used to analyze the correlation between the factors; non-parametric tests were used to compare the logMAR BCVA, AT, and CRT between the different ellipsoid zone integrity groups; multiple linear regression analysis was used to analyze factors related to AT.ResultsPearson correlation analysis showed that the logMAR BCVA was positively correlated with MI (r=0.303, P=0.04) and CRT (r=0.342, P=0.02), negatively correlated with AT (r=−0.59, P=0.00) and P1 (r=−0.38, P=0.01). There was negative correlation between AT and MI (r=−0.55, P=0.00). The result of multivariate linear regression analysis showed that the logMAR BCVA is inversely correlated with AT (t=−3.53, P=0.001). Group A, B and C were 23, 17 and 5 eyes in the 45 eyes, respectively. There were significant differences in logMAR BCVA, AT, and CRT between the three groups of eyes (P=0.045, 0.049, 0.018).ConclusionsIn DME patients, the logMAR BCVA was positively correlated with CRT, negatively correlated with AT and P1. The logMAR BCVA is inversely correlated with AT. Microperimetry combined with OCT and visual acuity can be used to assess the visual function of patients with DME.
Objective To observe the visual acuity change in patients with different patterns of optical coherence tomography (OCT) of diabetic macular edema (DME) after intravitreal ranibizumab injection and/or laser photocoagulation. Methods A retrospective observational case series. Seventy patients (99 eyes) with DME were enrolled. Best-corrected visual acuity (BCVA) was evaluated using the international vision test chart, and then convert the result to the logarithm of the minimum angle of resolution (logMAR). According to the morphological characteristics of OCT, the DME was divided into 3 patterns, including diffuse macular edema (DRT), cystoid macular edema (CME) and serous neuroepithelial layer detachment. The average follow-up was (80.43±74.89) days. The patients were divided into 3 groups according to the different treatments, including intravitreal ranibizumab injection group (group A, 21 patients, 25 eyes), intravitreal ranibizumab injection and laser photocoagulation group (group B, 23 patients, 26 eyes), laser photocoagulation group (group C, 26 patients, 48 eyes). The changes of absolute BCVA (ABCVA) and improved visual acuity were compared between different treatment groups and different OCT patterns. ABCVA = logMAR BCVA before treatment－logMAR BCVA after treatment. Improvement more than 0.3 of logMAR value was considered as improved visual acuity. Results There was no significant difference in ABCVA between different treatment groups (F=0.050,P＞0.05). The improved visual acuity in group A and B were great than group C (χ2=5.645, 6.301;P＜0.05). In group A, B and C, there was no significant difference in ABCVA and improved visual acuity between different OCT patterns (P＞0.05). Improved visual acuity of DRT and CME eyes were higher in group A&B (70.59% and 50.00%) than in group C (26.47% and 14.29%), the difference was statistically significant (χ2=5.075, 4.453;P＜0.05). Conclusions There is no obvious change of visual acuity in patients with different OCT patterns of DME after the same treatment by intravitreal ranibizumab injection and/or laser photocoagulation. The improved visual acuity is not consistent in same OCT patterns after different treatment.
Peripapillary intrachoroidal cavitation (PICC) is a common pathological change observed in high myopia. The exact pathogenesis of PICC is still unclear. Expansion and mechanical stretching of the peripapillary sclera, breakage and defect in the retina near the border of the myopic conus and communication between intrachoroidal cavity and the vitreous space may be important segments during the development of PICC. Color fundus photography shows a localized and well-circumscribed peripapillary lesion with yellow-orange colour, often accompanied by fundus changes, such as myopic conus excavation, optic disc tilting and inferotemporal retinal vein bending at the transition from the PICC to the myopic conus. However, the PICC lesion is not easy to be recognized in the fundus photography. Fluorescein angiography shows early hypofluorescence and later progressively staining in the lesion. Indocyanine green angiography shows hypofluorescence throughout the examination. Optical coherence tomography (OCT) is vital in diagnosing PICC. Hyporeflective cavities inside the choroid, sometimes communicating with the vitreous chamber, can be observed in OCT images. OCT angiography indicates lower vessel density or even absence of choriocapillary network inside or around PICC lesions.
Objective To evaluate the changes of optic nerve head (ONH) and the thickness of peripapillary retinal nerve fiber layer (RNFL) in patients with non-arteritic anterior ischemic optic neuropathy (NAION) using optical coherence tomography (OCT). Methods Circular and cross-sectional OCT scans of an area with a diameter of 3.38 mm surrounding the optic disc were performed for 108 eyes (96 cases) with NAION, including 96 eyes (96 cases) in acute edema phase and 41 eyes (37 cases) in resolving phase. Follow-up period was 2 weeks to 24 months, with an average of 6 months. Results The RNFL was thickener with shallow cup or small cups in the acute edema phase. Comparing with the RNFL in the ischemic sector, the thickness of peripapillary RNFL in the nonischemic sector was greater in 59 eyes (59 cases, 61%), lesser in 26 eyes (26 cases, 27%) and no difference in 11 eyes (11 cases, 12%). During the treatment NAION eyes were dynamically observed by OCT. While ischemic edema of the optic disc resolved in about two weeks, non-ischemic edema subsided in 3-6 weeks. After 1 month in the resolving phase, the thickness of peripapillary RNFL in the ischemic sector of 35 cases (95%) was thinner than the thickness of non-ischemic sector and fellow normal controls. After 3 month in the resolving phase, 26 cases (70%) showed thinner RNFL of whole optic disc. Conclusion The thickness of RNFL in NAION patients in acute edema phase is thicker than that in the fellow normal eyes, and is also thicker in ischemic sector than that in non-ischemic sector. In resolving phase, the thickness of RNFL is thinner in NAION eyes than that in the fellow normal eyes.
Dome-shaped macula (DSM) of high myopia has been described as an inward convexity or bulge of the macular within the concavity of the posterior staphyloma in highly myopic eyes, with the bulge height over than 50 μm, which can be observed by optical coherence tomography. There are three patterns of DSM, including the typical round dome, the horizontally oriented oval-shaped dome and the vertically oriented oval-shaped dome. The pathogenesis of DSM development remains unclear, several hypotheses have been suggested, such as localized choroidal thickening in the macular area, relatively localized thickness variation of the sclera under the macula, resistance to deformation of sclera staphyloma, ocular hypotony and tangential vitreoretinal traction. Vision-threatening macular complications of DSM including serous retinal detachment, choroidal neovascularization, foveoschisis and retinal pigment epithelial atrophy. Clinically, asymptomatic patients with DSM mainly take regular follow-up observation. Appears serous retinal detachment and significant visual impairment, treatment with half-dose photodynamic therapy, supplementary of laser photocoagulation or oral spironolactone may have a beneficial effect. However, more large clinical studies are required to confirm the exact efficacy of these treatments.