Objective To observe multimodality imaging features of different properties in multifocal choroiditis (MFC). Methods Twenty-eight patients (51 eyes) with MFC were enrolled in this study. There were 10 males and 18 females. The patients aged from 31 to 49 years, with the mean age of (41.5±0.8) years. There were 23 bilateral patients and 5 unilateral patients. All patients underwent best corrected visual acuity (BCVA), slit-lamp biomicroscopy, indirect ophthalmoscopy, fundus colorized photography, infrared fundus photography, fundus autofluorescence (FAF), fundus fluorescein angiography (FFA) and optical coherence tomography (OCT) examinations. The lesions were classified as active inflammatory lesion, inactive inflammatory lesion, active choroidal neovascularization (CNV) and inactive CNV. The multimodality imaging features of different properties in MFC was observed. Results In fundus colour photography, the boundaries of active inflammatory lesions were blurry, while inactive inflammatory lesions had relatively clear boundaries. Secondary active CNV showed mild uplift and surrounding retinal edema; Secondary active CNV lesions showed mild uplift, retinal edema around the lesion; Secondary non-active CNV had no retinal exudate edema lesions, but had lesions fibrosis and varying degrees of pigmentation. Infrared fundus examination revealed that both active and inactive inflammatory lesions showed a uniform punctate or sheet-like fluorescence. The fluorescence of CNV lesions was not uniform; there was a bright ring around the strong fluorescence. FAF found that active inflammatory lesions showed weak autofluorescence (AF), surrounded by a strong fluorescence ring; inactive inflammatory lesions showed AF loss. Secondary active CNV lesions showed strong AF with a bright ring along the edge, and obscured fluorescence for co-occurred hemorrhagic edema; secondary non-active CNV lesions were strong AF, surrounded by a weak AF ring. FFA revealed that active inflammatory lesions showed weak fluorescence in the early stage, and fluorescence gradually increased in the late stage with slight leakage. Inactive inflammatory lesions showed typical transmitted fluorescence. Fluorescein leakage secondary to active CNV was significant; lesions secondary to inactive CNV showed scar staining. In OCT, the active inflammatory lesions showed moderately weak reflex signals in the protruding lesions under the retinal pigment epithelium (RPE). The inactive inflammatory lesions showed penetrable RPE defects or choroidal scar, it also showed clear RPE uplift lesions with a strong reflection signal. Secondary active CNV showed subretinal fluid retention; secondary non-active CNV showed RPE defects and choroidal scarring. Conclusions Active inflammatory lesions in MFC have blurred boundary, retinal edema and fluorescein leakage in FFA; inactive inflammatory lesions have clear boundary and typical transmitted fluorescence in FFA, and no retinal edema. Secondary active CNV showed subretinal fluid in OCT; and secondary non-active CNV showed RPE defects and choroidal scarring.
ObjectiveTo observe the changes of blood flow density in the macular area of normal eyes, and to analyze its correlation with age. MethodsA cross-sectional study. Two hundred and fifty normal healthy subjects (125 males and 125 females, aged 44.76±14.77) in routine ophthalmologic examination at the Department of Ophtalmology of Guangdong Provincial People’s Hospital during June 2017 to June 2018 were enrolled. Among them, 20 to 29, 30 to 39, 40 to 49, 50 to 59, and ≥ 60 years old were 50 subjects (50 eyes) in each. BCVA, slit lamp microscope, indirect ophthalmoscope, OCT angiography (OCTA) examinations were conducted for all eyes. The subjects were examined by both eyes, and the data of 1 eye was selected by EXCEL to generate random numbers, including 126 right eyes and 124 left eyes. The range of 6 mm × 6 mm in the macular area was scanned using a frequency domain OCTA instrument. The software automatically divides it into three concentric circles centered on the macular fovea, which were foveal area with a diameter of 1 mm, parafoveal area of 1 to 3 mm, and foveal peripheral area of 3 to 6 mm. The blood flow density of superficial capillary vessel, deep capillary vessel and foveal avascular area (FAZ) within a 300 μm width (FD-300), FAZ area, perimeter (PERIM), non-circularity index, center retinal thickness (CRT) were measured. The relationship between the blood flow density in macula, CRT, FAZ and age was analyzed by Pearson correlation analysis. ResultsThe mean blood flow density of superficial capillary vessel and deep capillary vessel were (51.61±2.54)% and (54.04±5.46)%, respectively. The average FD-300, CRT, PERIM and non-circularity index were (285.55±12.13) μm, (2.150±0.367) mm, 1.10±0.04, respectively. The relevance of the results showed that the age was negatively correlated with the blood flow density of whole area (r=−0.335, −0.279; P＜0.01), parafoveal area (r=−0.255, −0.368; P＜0.01), foveal peripheral area (r=−0.330, −0.269; P＜0.01) in superficial capillary vessel and deep capillary vessel as well as FD-300 (r=−0.311, P＜0.01), but not correlated with the blood flow density of foveal area (r=−0.071, −0.118; P=0.264, 0.064). There was no relationship between the age and the FAZ area, PERIM, non-circularity index (r=−0.070, −0.055, 0.074; P=0.267, 0.385, 0.142). The age was negatively correlated with the average CRT (r=−0.217, P＜0.01), but not correlated with the CRT in foveal area (r=0.115, P=0.068). The CRT was positively correlated with the blood flow density of superficial capillary vessel and deep capillary vessel in foveal area (r=0.715, 0.653; P＜0.01), but negatively correlated with the FAZ area (r=−0.669, P＜0.01). ConclusionThe capillary blood flow density of macular area in the normal eyes decreases with age.
ObjectiveTo observe the imaging features of cystoid macular edema (CME) in multicolor imaging (MC), and to evaluate the value of MC in the diagnosis of CME.MethodsDescriptive case series study. From August 2017 to June 2018, 42 eyes of 37 patients with CME diagnosed in the people's Hospital of Wuhan University were included in the study. Among them, there were 24 males and 13 females, with an average age of 48.51±10.29 years. There were 14 eyes with diabetic retinopathy, 14 eyes with central retinal vein occlusion, 8 eyes with branch retinal vein occlusion, 4 eyes with uveitis, and 2 eyes with Eales disease. The macular color fundus photography (CFP) was performed with Visucam 200 non-mydriatic fundus camera of Zeiss company in Germany. MC, frequnce domainoptical OCT (SD-OCT) and FFA were examined by Spectralis HRA2 + OCT of Heidelberg company in Germany. According to the MC standard method, five images, including 488 nm blue reflection (BR), 515 nm green reflection (GR), 820 nm infrared reflection (IR) imaging and standard MC and blue-green enhancement (BG), were obtained at the same time. Compared with SD-OCT, CFP and MC images were scored. Friedman M test and Wilcoxon signed rank test were used for statistical analysis.ResultsThe standard MC and BG images showed blue-green uplift area or petal-shaped appearance, surrounded by green reflection areas with clear boundaries. BR image can be seen in the low reflexes area. On the GR image, there were patches or cystic low reflection areas, surrounded by a slightly high reflection. On the IR image, patches or cystoid high reflexes can be seen, surrounded by low reflection dark areas with clear boundaries. The average scores of CFP, standard MC, GB, IR, GR and BR were 1.20±0.94, 3.05±0.99, 2.90±1.04, 2.55±1.27, 2.00±0.94, 0.51±0.85 respectively, and the differences were statistically significant (χ2= 151.61, P=0.000). The score of CFP were significantly lower than that of standard MC (Z=－5.421), BG (Z=－5.354), IR (Z=－4.714), GR (Z=－4.438) and higher than that of BR (Z=－3.435). The differences were statistically significant (P=0.000, 0.000, 0.000, 0.000, 0.001).ConclusionsThe quality of MC imaging is better than that of CFP. Combined with SD-OCT, it can be used as an assistant method to diagnose CME.
ObjectiveTo observe the changes of glaucoma optic nerve head (ONH) parameters and macular ganglion cell complex (GCC) structure in preperimetric glaucoma (PPG) patients. Methods Eighteen PPG patients (18 eyes, PPG group), 22 primary open-angle glaucoma (POAG) patients (22 eyes, POAG group), and 20 patients (20 eyes) with physiologic large optic cup (physiological big optic cup group) were included in this study. Seventeen healthy volunteers (17 eyes) were the normal control. The optic nerve head and macular was scanned by fourier-domain optic coherence tomography (FD-OCT) for all subjects. The following 15 parameters, including nerve fiber layer thickness (RNFL), the optic disk rim volume (RV), optic nerve head volume (NHV), optic disc area (ODA), rim area (RA), cup volume (CV), cup/disc area ratio (CDAR), vertical cup/disc ratio (VCDR), horizontal cup/disc ratio (HCDR) and optic cup area (CA), macular GCC, superior GCC, inferior GCC thickness, focal loss of volume (FLV) and global loss of volume (GLV), were measured at 10 different quadrants. The relationship between macular GCC thickness or optic disc RNFL thickness and RA was analyzed by simple linear regression analysis. ResultsThe RNFL thickness of PPG patients was (99.29±19.93) μm (superior quadrant), (97.29±22.86) μm (inferior), (114.61±15.64) μm (superior temporal, ST), (119.22±26.19) μm (inferior temporal, IT), (116.11±39.32) μm (superior nasal, SN), (111.33±37.65) μm (inferior nasal, IN), (77.56±17.22) μm (temporal upper, TU), (76.78±10.34) μm (temporal lower, TL), (88.94± 42.54) μm (nasal upper, NU), and (82.33±43.83) μm (nasal lower, NL) respectively, which was thinner than normal control group and physiologic large cup group, but thicker than POAG patients. Compared to normal controls and physiologic large cup patients, PPG patients also had 4 parameters reduced (RV, NHV, ODA and RA), and 5 parameters increased (CV, CDAR, VCDR, HCDR and CA), the differences are statistically significant (P < 0.05). However, these parameters were similar to POAG patients (P > 0.05). For macular GCC parameters, PPG patients also had 3 parameters reduced (average GCC, superior and inferior GCC thickness), and 2 parameters increased (GLV and FLV) compared to normal control group and physiologic large cup patients (P < 0.05). However, these parameters were similar to POAG patients (P > 0.05).Simple linear regression analysis showed that, with the GCC macular thinning, reducing the number of ganglion cells reduced, optic disc RNFL thickness became thinner (regression coefficient=1.25, P=0.00) and RV reduced (regression coefficient=0.037, P=0.00). ConclusionsPPG patients and normal control had a similar distribution of optic disc RNFL. Five parameters (RV, NHV, ODA, RA, macular GCC thickness) were less than normal control and physiological big optic cup group, but had no significant differences compared with POAG group.
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.
Objective To observe the effect of macular retinal thickness (CMT) on the long-term visual prognosis after intravitreal injection of Conbercept combined with retinal laser photocoagulation for macular edema (ME) secondary to branch retinal vein occlusion (BRVO). Methods A retrospective non randomized controlled study. Forty-one patients (41 eyes) of ischemic BRVO secondary ME were included in the study. Among them, there were 23 males (23 eyes) and 18 females (18 eyes). The average age was (56.49±8.94) years. The best corrected visual acuity (BCVA) and optical coherence tomography were performed. The mean logMAR BCVA was 0.82±0.41, and the mean CMT was (512.61±185.32) μm. According to the CMT reduction value at 1 month after treatment, the eyes were divided into no response group and response group, each has 15 patients of 15 eyes and 26 patients of 26 eyes respectively. The age and sex composition of the two groups were not statistically significant (t=−0.298, −1.708; P=0.767, 0.096), and the difference of frequency of injection was statistically significant (t=3.589, P=0.010), and there was no statistical difference between the patients with logMAR BCVA and CMT (t=2.056, −1.876; P=0.460, 0.070). The average follow-up was 8 months. The logMAR BCVA on 6 months after treatment was defined as long term vision. The changes of long term vision and CMT on 1 and 6 months of two groups after treatment were observed. Pearson correlation analysis showed that the correlation between long-term vision and age, logMAR BCVA before treatment, CMT before treatment, frequency of injection, and CMT value decreased 1 month after treatment. The correlation of long-term visual acuity with age, sex, logMAR BCVA before treatment, CMT before treatment, number of drugs before treatment, CMT reduction at 1 month after treatment, integrity of ellipsoid band and integrity of external membrane (ELM) were analyzed by multiple regression analysis. Results On 1 month after treatment, the CMT of the eyes was lower than that before treatment (231.48±177.99) μm, and the average integrity of ELM and ellipsoid were 0.56±0.50 and 0.41±0.50 respectively. On 6 months after treatment, the average logMAR BVCA of the eyes was 0.48±0.34. The results of Pearson correlation analysis showed that the long-term vision was positively correlated with the logMAR BCVA before treatment and the number of CMT reduction and the number of drug injection at 1 month after treatment (P＜0.05); there was no correlation with age and CMT before treatment (P＞0.05). The results of multiple regression analysis showed that the long-term vision was associated with logMAR BVCA before treatment, CMT reduction, ELM integrity, and the number of times of injection (P＜0.05), and no correlation with age, sex, CMT before treatment and the integrity of the ellipsoid (P＞0.05). On the 6 months after treatment, the logMAR BCVA in the non-response group and the response group were 0.86±0.23 and 0.26±0.14, and the average CMT was respectively (398.93±104.87) and (255.15±55.18) μm, and the average injection times were respectively (2.53±1.46) and (1.31±0.74) times. The average logMAR BCVA, CMT and injection times of the two groups were statistically significant (t=10.293, 5.773, 3.589; P=0.000, 0.000, 0.001). No complications related to drug or intravitreal injection occurred in all patients. Conclusion The long-term vision of ME secondary to BRVO after intravitreal injection of Conbercept combined with retinal laser photocoagulation was associated with the decrease of CMT and the integrity of the ELM after 1 month of treatment, no correlation was found between CMT and ellipsoid integrity before treatment.
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.
Diabetic macular edema is the leading cause of central vision loss and even blindness in diabetic retinopathy. Compared to FFA, OCT can obtain the high-resolution 3D image quickly, easily to reflect the details of the tissue and realize the quantitative measurement. As a novel technology, OCT angiography (OCTA) can display microvascular structure from different layers of retina and choroid, having its advantage of quantifying the vessel density and the lesion area. By detecting fundus morphology, quantifying and quantitating the retinal vessels and vessel density, the combination of OCT and OCTA could play a guiding role in diagnosis, classification, treatment and prognosis of diabetic macular edema.
Objective To compare and quantitatively analyse the different characteristics of multimodal imaging of geographic atrophy (GA) in age-related macular degeneration (AMD). Methods The study included multimodel images of 32 eyes of 27 patients with GA secondary to AMD. There were 14 males (17 eyes) and 13 females (15 eyes). The age ranged from 64 to 83 years, with the mean age of (74.4±7.6) years. All eyes were examined by color fundus photography (CFP), fundus autofluorescence (FAF), fundus fluorescein angiography (FFA) and spectral domain optical coherence tomography (OCT). Using image J software, two trained ophthalmologists, operating in masked fashion, graded the area of lesions of CFP, FAF and FFA independently and compared the sizes of GA area. OCT was performed to confirm the border of lesion when FAF difficult to be determined. The results consistency of two ophthalmologists was analyzed by Bland-Altman. Results The results consistency was high of two ophthalmologists, with the variation range of FFA＜FAF＜CFP. The GA area of CFP, FAF and FFA were (19.81±13.03), (21.50±13.61), (23.10±14.29) mm2. The difference of GA area between three multimodel images was statistically significant (F=0.466, P=0.629). Conclusion The mean size of GA measured by CFP, FAF and FFA showed no statistical difference.
ObjectiveTo observe the optical coherence tomography angiography (OCTA) image characteristics of polypoid choroidal vascular disease (PCV) after intravitreal injection of anti-vascular endothelial growth factor drugs, and to discuss its significance in the diagnosis and follow-up of PCV.MethodsA retrospective case study. From August 2018 to January 2020, 22 eyes of 22 patients with PCV diagnosed in the ophthalmological examination of Affiliated Hospital of Weifang Medical University were included in the study. Among them, there were 10 males with 10 eyes and 12 females with 12 eyes; the average age was 67.75±9.53 years. Best corrected visual acuity (BCVA), OCTA, and indocyanine green angiography (ICGA) were performed. All the affected eyes were injected vitreously with 10 mg/ml Conbercept 0.05 ml (including Conbercept 0.5 mg) once a month for 3 consecutive months.Tthe macular area of 3 mm×3 mm and 6 mm×6 mm with an OCTA instrument was scanned, and the foveal retinal thickness (CRT) was measured, the area of abnormal branch blood vessels (BVN). pigment epithelial detachment before and 12 months after treatment (PED) height, foveal choroid thickness (SFCT) were performed. The diagnosis rate of PCV by OCTA was observed, as well as the changes of various indicators of BCVA and OCTA. Before and after treatment, BCVA and CRT were compared by paired t test; BVN area, PED height, and SFCT were compared by variance analysis. The changes in imaging characteristics of OCTA before and after treatment were analyzed.ResultsAmong the 22 eyes, 8 eyes were BVN; 5 eyes were polypoid lesions (polyps); 5 eyes were BVN combined with polyps; 3 eyes were not found with BVN and polyps; 1 eye with small vascular network structure, this eye was ICGA Appears as strong nodular fluorescence (polyps). The detection rate of PCV by OCTA was 86.36% (19/22). Twelve months after treatment, BVN was significantly reduced or disappeared in 16 eyes (72.72%, 16/22); polyps disappeared in 17 eyes (77.27%, 17/22). Compared with before treatment, 12 months after treatment, BCVA increased (t=3.071), CRT decreased (t=2.440), the difference was statistically significant (P＜0.05); the average BVN area, PED height, and SFCT decreased. The difference in average BVN area and PED height was statistically significant (F=2.805, 3.916; P＜0.05), and the difference in SFCT was not statistically significant (F=0.047, P＞0.05).ConclusionsThe detection rate of PCV by OCTA is 86.36%. After PCV anti-vascular endothelial growth factor drug treatment, BVN area decrease and polyps subside. OCTA is an effective means for PCV diagnosis and follow-up after anti-VEGF drug treatment.