Outer retinopathy does not refer to a specific type of retinal disease. Patients with outer retinopathy often have abnormal vision symptoms, however, no positive signs can be found with conventional routine eye examination. And the diseases are often labeled “occult”. In recent years, optical coherence tomography (OCT) has been widely used in clinical practice. It has been found that many so-called “occult” diseases are actually caused by structural abnormalities of the outer retina. The causes of structural abnormalities are diverse, and the treatments and disease outcomes are also different. Therefore, it is necessary for clinical ophthalmologists to get detailed medical history, make diagnosis and differential diagnosis based on multi-model imaging, rather than roughly name it as “outer retinopathy”. With the development of OCT imaging technology, higher resolution images reveal the finer structure of retinal tissue, allowing us to have a deep understanding of the disease, thus improving diagnosis and treatment in clinical practice.
ObjectiveTo observe the clinical efficacy of digital 3D heads-up display viewing system (3D viewing system) and intraoperative OCT (iOCT) in vitrectomy for myopic foveoschisis (MF).MethodsA retrospective, consecutive case series. From October 2018 to May 2019, Nineteen eyes of 19 consecutive patients with MF diagnosed in Xiamen Eye Center of Xiamen University who underwent vitrectomy were included in this study. There were 7 males and 12 females, with the mean age of 54.47±11.38 years. The average axial length was 30.40±2.30 mm, the mean logMAR BCVA was 0.56±0.31, the mean central foveal thickness (CFT) was 317.80±151.9.32 μm, the mean max retinal thickness (maxRT) was 556.7±143.7 μm. All the surgeries performed combined with 3D viewing system with iOCT. The standard 25G pars planar vitrectomy were performed with removing the posterior vitreous and indocyanine green (ICG) staining of internal limiting membrane (ILM) and air-fluid exchange. Thirteen of 19 eyes underwent fovea-sparing ILM peeling and the other 6 eyes not. The average follow-up was 4.2±1.4 months. All the patients were on regular follow-up to document the changes on BCVA, anatomical changes in macula, CFT and maxRT. Paired t test was used to compare BCVA, CFT and maxRT before and after surgery.ResultsThe fine images of macula were clearly shown on the 3D viewing system in all eyes. The electronic green filter enhanced the contrast sensitivity of ICG stained images. Clear images of macula were captured by iOCT in all eyes. The average surgical time was 35.5±8.2 min. On the last follow-up, 16 of 19 eyes with MF resolved. The mean CFT was 178.5±103.5 μm, the maxRT was 341.8±83.8.16 μm, and the mean logMAR BCVA was 0.35±0.22. The differences of CFT, maxRT and logMAR BCVA before and after surgery were statistically significant (t=4.181, 7.154, 5.129; P＜0.001). Minimal invisible full thickness macular hole were detected in 2 eyes by iOCT and repaired with auto serum or ILM flap covering. There was no complication associated with the 3D viewing system.Conclusions3D viewing system provides improved contrast and crystal clear macular image stain with ICG in pathological myopia. iOCT can detect the minimal invisible full thickness macular hole during surgery. Both may contribute to improved MF closure rate and BCVA.
ObjectiveTo observe the changes of retinal blood flow density and thickness in the macular region of eyes with high myopia (HM) combined with peripapillary intrachoroidal cavitation (PICC). MethodsA cross-sectional study. From March 2019 to May 2021, 65 patients (65 eyes) diagnosed as PICC (HM+PICC group) in Eye Hospital, China Academy of Chinese Medical Sciences, sex-and age-matched 69 HM patients of 69 eyes (HM group) and 65 healthy people of 65 eyes (control group) were enrolled in this study. The optical coherence tomography angiography was used to scan macular areas in 3 mm×3 mm, and measure the macular fovea and optic disc on superior, inferior, nasal, temporal superficial capillary plexus (SCP) and deep capillary plexus (DCP) vessel density in the foveal and parafoveal region, and macular retinal ganglion cell complex (mGCC) thickness, full retinal thickness. One-way analysis of variance were used to test the difference of the index values among three groups, and then two groups were compared with Bonferroni test. A paired t-test was used to test the difference of the macular vessel density and thickness between the superior and inferior hemifield in three groups. Pearson partial regression analysis was used to calculate the correlations between them at same sites. ResultsPICC was located most frequently at the inferior temporal disc border, followed by the inferior nasal region, superior temporal region, and superior nasal region in the HM+PICC group on 57(87.7%, 57/65), 25(38.5%, 25/65), 3(4.6%, 3/65) and 1(1.5%, 1/65 ) eye. There were significant differences in the global and regional full retinal thickness, mGCC thickness, SCP and DCP vessel density among 3 groups (F=29.097, 51.929, 16.253, 6.135; P＜0.001). The macular SCP and DCP vessel density except in the fovea, all regional macular full retinal thickness and mGCC thickness in the HM+PICC group were significantly lower than those in the normal group (P＜0.05). Compared to the HM group, the HM+PICC group had lower all regional mGCC thickness and SCP vessel density, as well as full retinal thickness in the inferior hemifield and DCP vessel density in the foveal region (P＜0.05). Macular vessel density and thickness in the inferior hemifield were significantly lower than those in the superior hemifield (t=6.356, 11.693, 6.212, 2.936; P＜0.01). Pearson partial regression analysis showed the SCP vessel density was positively correlated with corresponding mGCC thickness and full retinal thickness (r=0.584, 0.534, 0.592, 0.496, 0.485, 0.517; P＜0.001). However, there was no significant correlation between the DCP vascular density and mGCC thickness (P＞0.05), and only a weak positive correlation between the DCP vascular density and the full retinal thickness in the inferior hemifield (r=0.319, P=0.014). However, no association with average and superior full retinal thickness (r=0.066, 0.002, 0.125, 0.184, 0.016, 0.319; P＞0.05). ConclusionThe macular SCP vessel density, mGCC thickness and the full retinal thickness in the inferior hemifield in PICC eyes are lower than those in the HM eyes, especially the mGCC thickness and SCP vessel density in the inferior hemifield, and there is a strong positive correlation between them.
ObjectiveTo observe the choroidal vascularity index (CVI) and the subfoveal choroidal thickness (SFCT) of central serous chorioretinopathy (CSC), and to compare the stability and consistency of the two methods of measurement.MethodsA retrospective study. Thirty-one patients with unilateral acute CSC who visited the Department of Ophthalmology of Beijing Friendship Hospital for the first time during the period from Nov 1st, 2016 to Mar 18th, 2018 were included in the study. Thirty-one healthy age-matched subjects were enrolled as controls. All CSC affected eyes and their fellow eyes and healthy eyes were scanned by single-line enhanced depth imaging of OCT through central fovea of macula to measure their SFCT. The image was binarized and then the CVI of a 1500 μm range below fovea was calculated, i.e. the ratio of vascular (or lumen) area to total choroidal area. CVI and SFCT were compared among CSC eyes, fellow eyes and healthy eyes by variance analysis. Intra-group correlation coefficient (ICC), Bland-Altman curve and coefficient of variation (CV) were used to analyze the repeatability, consistency and stability of CVI and SFCT; and Medcalc18.2.1 software was used to draw the Bland-Altman curve and observe the consistency of the two measurement methods.ResultsThere were statistically significant differences in CVI and SFCT between CSC affected eyes and fellow eyes (t=3.470, 2.844; P=0.001, 0.006), CSC affected eyes and healthy eyes (t=6.977, 6.277; P＜0.001,＜0.001), fellow eyes and healthy eyes (t=3.508, 3.433; P=0.001, 0.001). Relative consistency analysis of CVI and SFCT showed that the ICC of single measurement and average measurement of CVI were 0.967 and 0.983 respectively, and that of single measurement and average measurement of SFCT were 0.937 and 0.967 respectively. The consistency of CVI and of SFCT was very good. The ICC value of CVI was slightly higher than that of SFCT. The results of repeatability analysis of CVI and SFCT showed that the difference between the two CVI measurements was smaller, and the difference between the two SFCT measurements was larger. And CVI and SFCT stability analysis results showed that the CV of CVI and SFCT were 10.5% and 25.3% respectively. CVI has smaller CV than SFCT.ConclusionsCompared with healthy eyes, CVI and SFCT are increased in CSC affected eyes and fellow eyes. And compared with SFCT, CVI has better consistency, repeatability and stability.
ObjectiveTo comparatively observe features of choroidal osteoma by multimodal fundus imaging methods.
MethodsThis is a retrospective case study. Sixteen patients (16 eyes) with choroidal osteoma were enrolled in this study. The patients included 6 males (6 eyes) and 10 females (10 eyes), with an average age of (30.5±2.4) years. All patients received examination of best-corrected visual acuity, slit lamp microscope, indirect ophthalmoscopy, fundus color photography, fundus autofluorescence (AF), fundus fluorescein angiography (FFA) and spectral domain optical coherence tomography (SD-OCT). The tumors were classified as fresh lesion (clear boundary and rosy tumor with smooth surface) and obsolete lesions (pale and flat tumor with obvious patches). The tumor features of color fundus photography, AF, FFA and SD-OCT were comparatively observed.
ResultsThere were 5 fresh lesions and 11 obsolete lesions. Color fundus photography showed the tumor color was orange-red or yellow-white with clear boundary and retinal blood vessels on the surface of the tumor. The color of fresh lesion was rosy. In general, choroidal osteoma shown weak AF, however AF of fresh tumor was slightly stronger than the obsolete tumor, and retinal detachment region showed relatively stronger AF. FFA of fresh tumor indicated uniform intense fluorescence with clear boundary at late stage, much stronger than obsolete tumor. SD-OCT showed mesh-like reflected signal in the choroidal layer, but different from the surrounding choroidal vascular structures.
ConclusionsThe tumor color is orange-red or yellow-white in color funds photography, which shown weak AF. FFA showed mottled hyperfluorescence in the early stage and tissue staining at the late stage. SD-OCT showed mesh-like reflected signal in the choroidal layer.
Objective To observe the image characteristics of eyes with choroidal osteoma using enhanced spectral domain optical Cirrus coherence tomography （SD-OCT）, and to explore their relationship with visual acuity. Methods The records and SD-OCT images of 14 patients（18 eyes） diagnosed with choroidal osteoma at this hospital were reviewed retrospectively. All patients received examinations of best corrected visual acuity (BCVA), direct or indirect ophthalmoscope, slit lamp ophthalmoscope, fundus fluorescein angiography, B scan and/or computerized tomography. Subtle structure changes of the retina and choroidal osteoma were observed by four lines of the horizontal, the vertical scanning lines through the foveal and the tumor basal diameter under the model of five Line Raster．The correlation between the retinal and choroidal morphology and visual acuity was evaluated. Results The choroidal features of SD-OCT image of choroidal osteoma can be categorized into hyper-reflective in six eyes (33.3%), isoreflective in five eyes (27.8%), hypo-reflective in three eyes (16.7%) and mixing-reflective in four eyes (22.2%). The foveal thickness ranged from 50.2 to 245.1μm, and the average foveal thickness was (130.2±58.3) μm. The horizontal and vertical diameters of choroidal osteoma ranged from 5.6 to 15.8 mm and 4.6 to 12.8 mm respectively. The average horizontal and vertical diameters of choroidal osteoma were (7.8±2.9) mm and (6.5±2.5) mm respectively. The statistical analysis revealed that BCVA was not related to the horizontal, vertical diameters of choroidal osteoma or the foveal thickness （r=0.262, 0.229, 0.137; P=0.284, 0.294, 0.362）. BCVA was related to the involvement of fovea and the integrity of photoreceptor inner/outer segment junction (IS/OS) （r=-3.838,-4.559; P=0.0015, 0.0003），but not related to macular choroidal neovascularization (CNV) or serous retinal detachment （r=-0.144, 0.411; P=0.684, 0.687）. Conclusions The main SD-OCT image characteristics of eyes with choroidal osteoma was hyper-reflective and isoreflective. BCVA was not related to the horizontal, the vertical diameters of choroidal osteoma, the foveal thickness, macular CNV or serous retinal detachment. It was related to the involvement of fovea and the integrity of IS/OS.
ObjectiveTo observe the effect of 25G pars plana vitrectomy (PPV) combined with or without internal limiting membrane (ILM) flap and sterile air or perfluoropropane (C3F8) tamponade in the treatment of idiopathic macular hole (IMH).MethodsA retrospective case analysis. From December 2015 to December 2016 in Tianjin Eye Hospital, 101 eyes of 98 consecutive IMH patients who underwent 25G PPV combined with or without ILM flap and sterile air or C3F8 tamponade, were included in this study. All patients underwent BCVA and OCT examination. The BCVA examination was performed using the international standard visual acuity chart, which was converted into logMAR visual acuity. The patients were divided into three groups according to preoperative minimum liner diameter of Hole (MLD) and surgical methods: MLD＜400 μm for the group A, 41 eyes of 39 patients, MLD more than 400 μm without ILM flap surgery as the group B, 39 eyes of 38 patients, including 16 eyes tamponaded with air and 23 eyes tamponaded with C3F8, MLD more than 400 μm with ILM flap as the group C, a total of 21 patients of 21 eyes, including 7 eyes tamponaded with air and 14 eyes tamponaded with C3F8. The logMAR BCVA of group A, B and C were 0.82±0.39, 1.11±0.42, 1.25±0.50, respectively. The follow-up times were 1 week, 1 month, 3 month, 6 month and 1 year post operation, BCVA and OCT were performed at each follow-up time. The hole closure rate and BCVA improvement were observed.ResultsThe postoperative BCVA of group A, B and C was improved obviously, the differences were statistically significant (t=?11.66, ?7.52, ?4.99; P＜0.01). There was no significant difference in improvement of visual acuity between the three groups (A and B, A and C, B and C group: t=0.77, ?0.41, 0.28; P=0.44, 0.72, 0.76). 96.94% macular hole closure occurred in 7 days post operation. The postoperative visual acuity improved significantly in 3 mouth after operation,ConclusionsThe macular hole closure occurred mainly in 1 week after operation, postoperative visual acuity increased mostly in the 3rd month post operation. There is no advantage of ILM flap in improve postoperative visual acuity of IMH patients with MLD more than 400 μm.
ObjectiveTo observe and analyze the fundus of pregnancy-induced hypertension syndrome (PIHS) and optical coherence tomography (OCT) characteristics and its correlation with ocular symptoms and degree of the systemic disease.
MethodsA total of 132 PIHS patients (264 eyes) received the examinations of corrected visual acuity, slit lamp microscope, direct ophthalmoscope, OCT and fundus color photography after obtaining informed consent in the study. There were 10 cases of gestational hypertension, 29 cases of preeclampsia (mild), 82 cases of pre-eclampsia (severe) and 11 cases of eclampsia. 91 patients (180 eyes) felt blurred vision and visual fatigue. 102 patients were examined at an average gestational age of (37.00±2.14) weeks and 30 patients were examined at an average (10.00±8.22) days postpartum. The ocular fundus was divided into normal fundus and abnormal fundus; the abnormal fundus had 3 stages, including stageⅠ(retinal arterial spasm), stageⅡ(retinal arteriosclerosis) and stageⅢ(retinopathy). If the OCT results seems to be abnormal, these patients were further selected to observe the changes of neurosensory serous retinal detachment, retinal pigment epithelium (RPE) and junction of inner and outer segment of photoreceptor (IS/OS). Kappa test was used to analyze the consistency between fundus performance and OCT results, and that of ocular symptoms with fundus changes and OCT results. Rank correlation test was used to analyze the degree of PIHS and OCT examinations.
ResultsThere were 32 eyes with normal fundus (12.12%) and 232 eyes with abnormal fundus (87.88%). The 232 eyes with abnormal fundus were divided into three stages: stageⅠfor 16 eyes (6.90%), stageⅡfor 31 eyes (13.36%) and stageⅢfor 185 eyes (79.74%). 92 of 264 eyes (34.85%) had normal OCT findings, 172 eyes (65.15%) were abnormal, including 94 eyes with serous retinal neurosensory detachment (54.65%), 40 eyes with changes of RPE and IS/OS (23.26%) and 38 eyes with other manifestations (22.09%). Kappa test analysis showed highly consistency between OCT results and ocular symptoms (K=0.728, Po=0.591), and poor consistency between fundus abnormalities and ocular symptoms (K=-0.129, Po=0.879), and between fundus abnormalities and OCT results (K=0.174, Po=0.682). OCT results were positively correlated with the degree of PIHS (C=0.374, χ2=74.011; P=0.000).
Conclusions87.88% of PIHS eyes had various degrees of retinal hemorrhage, cotton wool spots, retinal bumps or detachment, optic disc edema and other retinal abnormalities. 65.15% of that showed OCT abnormal results such as neurosensory retinal detachment, cystoid edema, RPE changes etc. The consistency was poor between the OCT results and fundus abnormalities. OCT results are positively correlated with the degree of PIHS.
ObjectiveTo evaluate the assistant effect of intraoperative OCT (iOCT) in vitreous retinal surgery for macular disease.MethodsA retrospective case study. A total of 71 patients (71 eyes) with macular disease who underwent vitrectomy in Eye Hospital of Wenzhou Medical University at Hangzhou from June 2015 to September 2016 were collected. There were 24 males (24 eyes) and 47 females (47 eyes), aged from 25 to 78 years, with the mean age of 63.35±10.01 years. Among 71 eyes, there were 26 eyes with idiopathic macular hole, 42 eyes with idiopathic epiretinal membrane, 3 eyes with vitreomacular traction syndrome. The examination of iOCT was performed on the patients during 23G minimally invasive vitreoretinal surgery combined with internal limiting membrane peeling. Use observational method to compare the difference between result of iOCT and observation under the microscope, record the change of treatment strategy.ResultsEight eyes (11.27%) iOCT results were different from the surgeon’s observation, which including 5 eyes (62.50%) with idiopathic macular hole, 2 eyes (25.00%) with idiopathic epiretinal membrane, 1 eye (12.50%) with vitreomacular traction syndrome. The treatment strategy was changed in 8 eyes (11.27%) based on iOCT result, which including 5 eyes (62.50%) with idiopathic macular hole, 2 eyes (25.00%) with idiopathic epiretinal membrane, 1 eye (12.50%) with vitreomacular traction syndrome.ConclusionsiOCT can help the surgeon find some subtle morphological changes which can hardly be seen by eyes. The surgeon can change and optimize the treatment strategy based on the result of iOCT.
Lipid globules in retina and choroid are new definitions based on pathology and high-resolution optical coherence tomography (OCT). OCT examination shows that the lipid globules are low reflective circular cavities in the choroid and retina, without strong reflective boundaries around them, followed by a characteristic superreflective tail. It occurs in healthy human eyes and in age-related macular degeneration characterized by retinal pigment epithelium (RPE) atrophy. Its characteristic superreflective tail is the key to distinguishing it from other diseases. At present, the understanding of lipid globules is still in the initial stage. Although lipid globules can be observed in healthy human eyes, a certain prevalence rate indicates that they are associated with choroidal hypoperfusion and RPE atrophy. In the future, larger randomized controlled trials and longer follow-up time are needed to explore its pathogenesis, pathological characteristics and treatment prognosis.
