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Purpose: To investigate the longitudinal changes in myopia from onset to stabilization in school‐aged children with single‐vison lenses (SVLs). Methods: The medical records of patients wearing SVLs with long‐term follow‐up data between 2006 and 2016 were retrospectively reviewed. The patients who were 6–10 years old at the initial visit and 16 years old at the last assessment were included and analysed. The periods of progression and stabilization of myopia were evaluated by plotting fitted curves of the changes in spherical equivalent (SE). Results: Seven hundred and seventy‐three patients (median initial age 9 years) were accessed over an average of 7 years (IQR, 6–7 years). The initial mean SE was −1.92 ± 1.57 D and increased to −6.05 ± 2.14 D at 16 years old. The average age at myopia stabilization was 14.6 years, and girls slightly stabilized earlier than boys. 73.7% of the 6‐year‐olds and 85.7% of the 7‐year‐olds had high myopia at 16 years old, and the risk decreased each year from 7 to 10 years old. Children who had SE greater than −4 D up to 10 years had 89.0% risk of high myopia at 16 years old. Children with SE between −0.5 D and −2 D still had 34% risk of developing high myopia at 16 years old. Conclusion: This study provides a comprehensive picture of myopia progression from onset to stabilization in school‐aged children with SVLs in China. All children who have myopia onset below 10 years of age were at risk for high myopia, and children who have myopia onset below 8 years of age require more attention. [ABSTRACT FROM AUTHOR]

Purpose: To create a computational fluid dynamics (CFD) model of ocular anterior segment for primary angle closure diseases (PACD) and assess the aqueous humour (AH) dynamics in different angle closure ranges (ACRs)., Methods: The ocular anterior segment geometry was obtained from an optical coherence tomography image by SOLIDWORKS. Three different angle opening distance at 750 µm from the scleral spur (AOD750) values were established to mimic three widths of anterior chamber angle. The AH dynamics were modelled using the Navier-Stokes equation. The 3D CFD model of the ocular anterior segment was created in COMSOL Multiphysics. The major outcome was the maximum flow velocity (MFV) and pressure in the ocular anterior segment. An in vitro simulation model was used to validate the computational results of the pressure and ACRs., Results: The MFV and pressure both showed a non-linear association with ACR in the CFD models of PACD. The MFV and pressure started to elevate when ACR was larger than 180°, and increased dramatically when the ACR was larger than 270°. The in vitro experiment of the pressure changes was consistent with the CFD model. No significant differences of the MFV and pressure among the three AOD750 models., Conclusions: The association among the ACR, MFV and pressure is an ascending curve in PACD, and ACR of 180° and 270° are two critical turning points. Our results are consistent with clinical phenomenon and may be used to provide better guidances for the clinical management of PACD in different stages., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Objective: To explore the stability of seminal plasma miR-122-3p and miR-141-5p and their diagnostic value for idiopathic asthenospermia., Methods: Seminal plasma miR-122-3p and miR-141-5p with various incubation time, freeze-thaw cycles and incubation time were analyzed. Real-time fluorescence quantitative polymerase chain reaction (RT-PCR) was used to detect the content of miR-122-3p and miR-141-5p, with U6 snRNA as the reference. The idiopathic asthenospermia group was further divided into grade I and II based on the progressive motility percent, and the content of miR-122-3p and miR-141-5p in the two grades were compared., Results: No difference was detected after incubation at room temperature and 4 degrees Celsius. But seminal plasma miR-122-3p and miR-141-5p have decreased along with the increase in freeze-thaw cycles increases. RT-PCR assayed showed that the miR-122-3p content in the idiopathic asthenospermia group was significantly lower than the control group, while miR-141-5p was significantly higher. The difference in both miR-122-3p and miR-141-5p content was statistically significant (P < 0.05). A significant difference in miR-122-3p and miR-141-5p content between a and b groups was also detected (P < 0.05). The AUC-ROC of miR-122-3p was 0.88. At the cutoff value of 1.02, the sensitivity and specificity was 83% and 84%, respectively. At the cutoff of 2.95, the AUC-ROC of miR-141-5p was 0.88. The sensitivity and specificity was 84% and 70%, respectively., Conclusion: MiR-122-3p and miR-141-5p in seminal plasma are stable and have certain value for the diagnosis of idiopathic asthenospermia.