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.
Objective To observe the thickness of the retina, retinal nerve fiber layer (RNFL), choroid and sclera among the difference posterior sclera shape (PSS) in high myopia (HM). Methods Sixty HM patients (96 eyes) were enrolled in this study. There were 18 males (25 eyes) and 42 females (71 eyes). The mean age was (51.32±10.06) years. The mean spherical equivalent was (-14.38±6.31) DS. The mean axial length was (29.49±2.44) mm. The eyes were evaluated from deep range imaging optical coherent tomography (DRI-OCT) Atlantis 3D model, and divided as four groups include PSS-Ⅰ (27 eyes), PSS-Ⅱ (46 eyes), PSS-Ⅲ (11 eyes) and PSS-Ⅸ (12 eyes) according to the Curtin classification method. The thickness of the retina, RNFL, choroid and sclera were measured in the EDTRS Grid area. Results There were statistically significant differences in the thickness of retina of the central, first circle, second circle in the EDTRS Grid area among PSS-Ⅰ, PSS-Ⅱ, PSS-Ⅲ and PSS-Ⅸ groups (F=4.48, 5.03, 4.98; P＜0.01). There was no statistically significant differences in the thickness of RNFL among four groups (F=0.13, P=0.93). There was no statistically significant differences in the central choroidal thickness (F=0.31, P=0.81). There were statistically significant differences in the first circle, second circle choroidal thickness among four groups (F=2.86, 2.96; P=0.04, 0.04). There was no statistically significant differences in the thickness of sclera under macular fovea among four groups (F=0.80, P=0.49). Conlusions There are changes of thickness of the retina, choroid present in the difference EDTRS Grid area among the difference PSS in HM, and changes in PSS-Ⅸ is most obvious.
Optical coherence tomography angiography (OCTA) base on OCT with an algorithm that can image a high-resolution picture of retinal circulation. OCTA has allowed quantifying the characteristic lesions of diabetic retinopathy (DR) in early stage, such as fovea avascular zone, retinal vascular density and the counts of retinal microaneurysm. In addition, OCTA can objectively evaluate the progression and prognosis of DR in late stage through imaging involved retinal neovascularization. Understanding OCT angiography features of DR lesions with different course of the disease may provide reference value for the diagnosis and treatment of DR.
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 image characteristics of OCT in patients of acquired immunodeficiency syndrome (AIDS) with cytomegalovirus retinitis (CMVR).MethodsThirty-nine eyes of 26 patients of AIDS with CMVR diagnosed in Department of ophthalmology of Beijing Ditan Hospital Capital Medical University from January 2015 to December 2017 were included in this study. All the patients were males, with the mean age of 33.12±9.87 years. All the patients underwent the OCT examination by Spectralis HRA+OCT. The locations of scanning were macular, optical papilla and posterior pole of retina with retinitis. Typical images were saved and analyzed.ResultsThe OCT pathological changes of CMVR included increase of retinal thickness and reflex of retina, indiscernible retinal layers, irregularity or absent external limiting membrane and/or ellipsoid zone, hyperreflective spots, vitreous cells. Among 39 eyes, there were 6 eyes with strong point-like reflection in the outer layer of retina around the lesion, 31 eyes (79.49%) with strong point-like reflection in the full layer of retina, 25 eyes (64.10%) with lesion involved macular area, 34 eyes (87.17%) with vitreous cells.ConclusionsOCT images of the eyes with AIDS with CMVR were characterized by lesions involving the whole retina. Absent ellipsoid zone or structural changes can be seen in the affected areas and peripheral areas of the lesion.
Objective To observe the choroidal blood flow and morphological changes in patients with severe stenosis of internal carotid artery stenosis (ICAS). Methods A retrospective case-control study. Forty-six patients (46 eyes) with ICAS were enrolled in this study. There was severe stenosis in one side (the eyes in this side were set as case group) and mild or no stenosis in other side (the eyes in this side were set as control group). Color doppler ultrasound (CDI) was used to observe the changes of hemodynamic parameters of the ophthalmic artery (OA) and posterior ciliary artery (PCA), the main parameters of ultrasound Doppler imaging are peak systolic velocity (PSV), end diastolic velocity (EDV), resistance indices (RI) and the calculation of the pulsation indices (PI) through the use of a formula. Enhanced binarization of deep imaging coherence tomography (EDI-OCT) was used to measure the subfoveal choroidal thickness (SFCT). The total subfoveal choroidal area (TCA), luminal (LA), stromal (SA) and choroidal vascularity index (CVI) were obtained by modified image binarization technique. Results In the case group, the PSV in the OA and PCA was significantly lower than that of the control group (t=−2.200, −2.612; P=0.030, 0.011). There were no significant differences in EDV, RI, PI of OA (t=0.337, −1.810, −1.848; P=0.737, 0.074, 0.068) and PCA (t=−1.160, 1.400, 0.815; P=0.249, 0.165, 0.417). The SFCT (t=−3.711, P＜0.001), TCA (t=−2.736, P=0.007), LA (t=−3.188, P=0.002) and CVI (t=−2.096, P=0.039) of the case group was significantly lower than that of the control group. There were no significant differences in SA (t=−1.262, P=0.210) and LA/SA (t=−1.696, P=0.093). Conclusion In severe stenosis ICAS eyes, the PSV in the PCA and SFCT, TCA, LA, CVI are decreased.
Objective To cpmpare the assessment of retinal and choroidal disease using confocal scanning laser ophthalmoscope (cSLO) imaging and color fundus camera. Methods Sixty-seven patients (90 eyes) with fundus diseases were included in this study. There were 35 males (51 eyes) and 32 female (39 eyes), mean age was 51.32 years. All subjects underwent fundus imaging using cSLO technology and traditional color fundus camera, positive numbers of every retinal pathological change were calculated and compared. Spectral domain-optical coherence tomography (SD-OCT) was also done to compare the accordance rate between two modes of fundus imaging (cSLO technology and traditional color fundus camera) and SD-OCT in choroidal changes. Results The positive numbers of retinal microaneurysm (χ2=4.157, P < 0.05) and epiretinal membrane (χ2=5.428, P < 0.05) using cSLO fundus imaging were significantly higher than traditional color fundus camera, while the positive numbers of cotton wool spots (χ2=0.523), retinal hemorrhage (χ2=0.117), hard exudates (χ2=0.325) and macular hole (χ2=0.070) were no significant different (P > 0.05). The SD-OCT accordance rate of choroidal pathological changes using cSLO technology was higher than traditional color fundus camera (χ2=9.143, P=0.007). Conclusion In retinal and choroidal diseases, the imaging quality of cSLO fundus imaging technology is better than the traditional color fundus camera technology.
Objective To observe the difference of macular microvascular features in superficial and deep vascular plexi in patients with branch retinal vein occlusion (BRVO). Methods A total of 63 BRVO patients (63 eyes) were enrolled in this study. There were 28 males (28 eyes) and 35 females (35 eyes). The patients aged from 39 to 74 years, with the mean age of (59.76±8.48) years. All eyes were evaluated by optical coherence tomography angiography (OCTA). The macular angiography scan protocol covered a 3 mm×3 mm area. The focus of angiography analysis included superficial vascular plexus and deep vascular plexus. The following vascular morphological parameters were assessed in these two plexi: foveal avascular zone (FAZ) enlargement, capillary non-perfusion (CNP) occurrence, microvascular abnormalities (MA) appearance, and vascular congestion (VC) signs. The FAZ area was measured by the built-in software. The macular microvascular morphology changes in superficial and deep vascular plexi were compared through McNemar test. Results The superficial and deep plexi showed FAZ enlargement in 43 eyes (68.3%) and 50 eyes (79.4%), CNP in 51 eyes (81%) and 50 eyes (79.4%), MA in 62 eyes (98.4%) and 62 eyes (98.4%), VC in 23 eyes (36.5%) and 52 eyes (82.5%), respectively. FAZ area was (0.55±0.37) mm2. There was no difference in CNP (P=1.000) and MA (P=1.000) between superficial and deep plexi. But, there was difference in FAZ enlargement (P=0.039) and VC signs (P＜0.001) between superficial and deep plexi. Conclusion Deep vascular plexus showed more FAZ enlargement and VC sign than superficial plexus in BRVO patients.
Objective To observe the clinical features of choroidal folds in Vogt-Koyanagi-Harada disease. Methods The clinical data of 112 patients with choroidal folds in Vogt-Koyanagi-Harada disease were retrospectively analyzed. All patients were examined by fundus color photography and fundus fluorescein angiography (FFA). 8 patients underwent indocyanine green angiography (ICGA) and 7 patients received optical coherence tomography (OCT) meanwhile. Results Of the 112 patients, 16 patients (14.3%) had choroidal folds. on FFA, there are 10 to 15 hypofluorescenct bands radiating from the optic disk which were similar to the large retinal vessels in shape and number(choroidal fine folds). On ICGA the choroidal folds showed obvious hyperfluorescence at the late stage. On OCT the reflective bands of Bruch membrane and retinal pigment epithelium (RPE) showed the wavy folds. Conclusions Choroidal folds in Vogt-Koyanagi-Harada disease are characterized by fine folds radiating from the optic disk which is not uncommon in Vogt-Koyanagi-Harada disease.
ObjectiveTo observe the subfoveal choroidal thickness (SFCT) and choriocapillary blood flow area (CBFA) in the patients with idiopathic macular hole (IMH).MethodsThis is a prospective clinical study. Thirty-two patients with unilateral IMH (4 in stage 2, 17 in stage 3, 11 in stage 4) and 32 age- and sex-matched normal controls were enrolled in this study. All eyes were divided into three groups, including group A (32 affected eyes), group B (32 fellow eyes) and group C (32 normal eyes of controls). There was no significant difference in age (t=0.865) and gender (χ2=0.000) in IMH patients versus normal control subjects (P＞0.05). There was no significant difference in refraction (F=0.957) and ocular axial length (F=0.562) between group A, B and C. The SFCT was detected by enhanced depth imaging of spectral-domain optical coherence tomography (OCT). The CBFA was detected by OCT angiography. The differences of SFCT and CBFA in three groups were analyzed by Kruskal-Wallis and non-parametric test.ResultsThe mean SFCT was (182.53±64.52) μm in group A, (199.21±73.07) μm in group B and (254.21±56.85) μm in group C respectively. The SFCT was thinner in group A and B than that in group C (Z=−4.362, −3.190; P＜0.05), but was the same in group A and B (Z=−1.171, P＞0.05). The mean CBFA was (5.09±0.31) mm2 in group A, (5.41±0.20) mm2 in group B and (5.39±0.15) mm2 in group C respectively. The CBFA was reduced in group A than that in group B and C (Z=−4.467, −4.048; P＜0.05), but was same in group B and C (Z=0.420, P＞0.05).ConclusionSFCT and CBFA are both reduced in IMH eyes.