Yunlei Pang’s research while affiliated with Government of the People's Republic of China and other places

Purpose Elevated blood glucose levels may disrupt tear film and meibomian gland function, contributing to dry eye disease (DED) and meibomian gland dysfunction (MGD). This study aimed to explore the relationship between hyperglycemia and DED parameters. Methods A cross-sectional study at Chifeng Chaoju Eye Hospital (June–August 2024) included 56 participants with DED symptoms. Tear meniscus height (TMH), non-invasive tear film breakup time (FNIBUT, ANIBUT), bulbar redness, and meibomian gland atrophy (U-LAMG, L-LAMG) were assessed using a non-invasive ocular surface analyzer. Fasting blood glucose levels stratified patients into high (≥7 mmol/l) and normal (<7 mmol/l) groups, and their association with DED parameters was analyzed. Results Among 56 patients (mean age 52.5 ± 18.0 years), those with elevated glucose levels (n=28) had more severe DED symptoms (OSDI, p = 0.046), lower TMH, FNIBUT, ANIBUT, and higher bulbar redness scores (all p < 0.05). In contrast, lower glucose levels were associated with greater U-LAMG and L-LAMG atrophy (p < 0.05). Glucose positively correlated with intraocular pressure (IOP), redness, U-LAMG, and L-LAMG but negatively correlated with TMH, FNIBUT, and ANIBUT (all p < 0.05). Conclusion Hyperglycemia is linked to impaired tear film stability, meibomian gland function, and DED symptoms. Ocular surface disorders in individuals with diabetes may be prevented by effective glycemic control.

Rationale The pathogenesis and course of recombinant Corona Virus Disease 2019 vaccine (CHO cell) associated uveitis is rarely seen in clinical practice, thus, it is difficult and time-consuming to diagnose. Patient concerns An adult female patient suffered from binocular visual impairment after receiving the Corona Virus Disease 2019 vaccine. The patient was healthy and had no family history of retinal dystrophy previously. This case showed the following features in multimodal imaging including scattered speckled fluorescein leakage was seen around the optic disc, and the leakage was slightly enhanced in the later stage. The macular area showed about 4 papillary diameter size discoid retinal detachment area fluorescein pool staining. Optical coherence tomography showed retinal choroidal folds above the optic disc, a small amount of fluid under the neuroepithelial layer, and serous detachment of the neuroepithelial layer in the macular area. Diagnosis Posterior uveitis of both eyes. Intervention Orally Maizhiling, Ginkgo biloba leaves, and multivitamins. Outcome After treatment, the symptoms of the patient were significantly improved, and optical coherence tomography reexamination showed exudation had been absorbed. Lessons The injection of a novel coronavirus-inactivated vaccine (CHO cell) can lead to potential uveitis disorders, which is worthy of clinical attention, but the prognosis of patients is good.

Objective To investigate the association between the peripheral refractive errors of the fundus in different regions and moderate and high myopia. Methods In this case-control study, 320 children and adolescents aged 6 to 18 years were recruited. Peripheral refractive errors were measured using multispectral retinal refractive topography (MRT). Spherical equivalent (SE) and cylinder errors were classified into low, moderate, and high categories based on the magnitude range. Logistic regression was performed to test the factors associated with myopia. Results There were 152 participants with low myopia and 168 participants with moderate and high myopia included in the current study. Participants with moderate and high myopia were most likely to be older, with larger axial length (AL), lower SE, less time to watch electronic devices on the weekend, a higher difference between central refractive error and paracentral refractive error from the superior side of the retina (RDV-S), but a smaller difference between the central refractive error and paracentral refractive error from the inferior side of the retina (RDV-I) than those with low myopia (all P <0.05). After logistic analysis, female sex (odds ratio [OR] = 4.14; 95% confidence interval [CI] = 2.16–7.97, P <0.001), AL (OR = 6.88, 95% CI = 4.33–10.93, P <0.001), and RDV-I (OR = 0.52, 95% CI = 0.32–0.86, P = 0.010) were independent factors for moderate and high myopia. Conclusion Our study demonstrated that the retina peripheral refraction of the eyes (RDV-I) was associated with moderate and high myopia, and RDV-S was only associated with high myopia.

Background: To compare the characteristics of biometric measurements among the LS900, IOL Master, and OPD-SCAN III in patients with mild-to-moderate cataract. Methods: We recruited 85 eyes of 78 patients diagnosed with mild-to-moderate cataract at our hospital between January and April 2023. The K (average corneal curvature; K1 and K2), astigmatism (AST), and white to white (WTW) were measured using those three devices, respectively. Differences and correlations between those measures based on the device were explored. Results: The K1, K2, and AST were highly consistent among the groups (P = 0.851, P = 0.626, P = 0.473, respectively). The WTW measured by IOL Master were larger than those measured by the LS900 and OPD-SCAN III (all P < 0.001). However, all three devices were highly correlated in all measures (P < 0.001). Bland-Altman plots indicated a significant agreement between three devices in all measurements (P < 0.001). Conclusions: K1, K2, and AST in patients with mild-to-moderate cataract were similar among all three devices, whereas the WTW were not. WTW measurement differences between three devices should be concerned in cataract cases.

Objective: To analyze the influence factors of the area of superficial plexus foveal avascular zone (FAZ) and related indexes of fovea measured with optical coherence tomography angiography (OCT-A) in normal subjects. Methods: This was a cross-sectional study from November 2020 to May 2021 in the Inner Mongolia Autonomous Region, China. Each subject received related eye examination. The correlation between all the factors and superficial plexus FAZ were analyzed under univariable and multivariable linear regression analysis. Results: Finally, 239 subjects with sufficient data were recruited in the study, including 108 males and 131 females, aged 27.41±4.63 years. The area of superficial plexus FAZ was 0.33±0.16 mm2. In the univariate regression, gender (β = 41.702, 95%CI: 9.152 to 74.253, P = 0.012), drinking (β = -66.074, 95%CI: -99.197 to -32.951, P = 0.001) and axial length (β = -15.874, 95%CI: -29.562 to -2.185, P = 0.023) were associated with superficial plexus FAZ area. In multivariate regression analysis results, drinking (β = -42.410, 95%CI = -79.388 to -5.432, P = 0.025) was significantly correlated with superficial plexus FAZ area. Conclusion: The area of superficial plexus FAZ was not affected by age, gender, systematical and biochemical indicators, but related to the status of drinking.

Purpose : To compare the inter-device agreement of anterior eye segment measurements between LenStar LS 900 optical biometer and OPD Scan III wavefront aberrometer. Methods : This is a retrospective study involving 59 patients (78 eyes) with cataract. Their angle Alpha, angle Kappa, pupil size and white-to-white (WTW) distance were measured by LenStar LS 900 optical biometer and OPD Scan III wavefront aberrometer, respectively, and pairwise agreement comparisons were performed between them. Results : The most agreement of various parameters was occurred, with intraclass correlation coefficient (ICC) of WTW = 0.930; angle Alpha = 0.853; angle Kappa = 0.898; and pupil size = 0,976 in bright environment. Furthermore, in dark environment, the ICC of WTW, angle Alpha, angle Kappa, and pupil size were 0.927, 0.791, 0.915, and 0.990, respectively. Bland-Altman plot showed similar excellent agreement in the outcomes of the two devices for these measurements testing. Conclusions : There was an excellent agreement between the LenStar LS 900 optical biometer and OPD Scan III wavefront aberrometer for WTW, angle Alpha, angle Kappa, and pupil size measurements. In clinical practice, these measurements obtained by LenStar LS 900 optical biometer and OPD Scan III wavefront aberrometer can be used interchangeably.

The correlations between retinal vessel distribution, anterior chamber depth (ACD) and other myopic eye structural parameters remains elusive. This study aims to investigate retinal vasculature and eye structure correlations in healthy and myopic eyes of Chinese young adults. In this cross-sectional study, 181 eyes (97 adults) were recruited. Macular and peripapillary vasculature was quantified by optical coherence tomography angiography. Correlations between retinal vasculature and eye structure were analyzed using multivariable linear regression. There were significant differences in ACD, spherical equivalent, axial length (AL), superficial macular vascular density (MVD), peripapillary vascular density (PVD) and circumference of foveal avascular zone (FAZ) among emmetropia, low-myopia, moderate-myopia, and high-myopia groups (both P < 0.05). Furthermore, ACD had significant positive correlation with AL and FAZ, but negative correlation with PVD. MVD also had a negative correlation with AL (beta = –0.247, P < .001). In addition, there was a significant negative correlation between circumference of the FAZ and spherical equivalent as well as central subfield thickness (beta = –0.20, P = .005; beta = –0.334, P < .001, respectively). The degree of myopia affected ACD, MVD, PVD, and circumference of the FAZ in eyes of young healthy adults. Meanwhile, ACD has a positive, while retinal vascular system measurements have a negative correlation with increasing severity of myopia.