Background: Surgically induced astigmatism (SIA) and corneal high-order aberrations (HOAs) are the two main causes of poor visual quality after cataract surgery. Changes in the parameters of corneal HOAs after cataract surgery and their effects on and relationships with changes in corneal curvature have not yet been reported. This study aimed to explore changes in anterior, posterior and total corneal curvature, astigmatism and HOAs after microincision cataract surgery.
Methods: Sixty-one age-related cataract patients (61 eyes) were included in this prospective study. The total, anterior and posterior corneal astigmatism and corneal HOAs were analyzed by anterior segment optical coherence tomography (AS-OCT) and iTrace before, one day, one week and three months after 2.2 mm temporal microincision coaxial phacoemulsification to evaluate the changes in anterior, posterior and total corneal curvature, astigmatism and corneal HOAs.
Results: The mean J0 and J45 values of anterior, posterior and total corneal curvature obtained by AS-OCT showed no statistically significant difference between preoperatively and any postoperative follow-up. SIA occurred on the anterior, posterior and total corneal surfaces and showed no statistically significant difference at any postoperative follow-up. No significant changes in 3rd-order oblique trefoil, vertical coma or 4th-order spherical aberrations were observed after surgery except for a significant increase in horizontal coma at postoperative day 1 (POD1).
Conclusions: There were no significant changes in corneal curvature after 2.2 mm temporal microincision coaxial phacoemulsification, and the corneal HOAs were not changed significantly except for the increase in horizontal coma at POD1, which may be one of the main reasons of poor visual quality at POD1 in some cataract patients who have good uncorrected or corrected distance vision.
Objective To explore the factors of macular edema after por-ogenous retinal detachment and its influence on visual vision. Methods A total of 180 (180 eyes) patients with rhegogenous retinal detachment admitted to our hospital from January 2021 to March 2023 were selected. 180 patients were classified without macular oedema (142 eyes) or (38 eyes) based on the optical coherence tomography (OCT) 1 month after surgery. Electronic medical records was collected for clinical data, and underwent ophthalmic examination for mean visual field defect (MD), intraocular pressure (IOP), axial length (AL), anterior chamber depth (ACD), central corneal thickness (CCT), and observed maximum systolic flow velocity (PSV), peak end diastolic flow velocity (EDV), and mean flow rate (MV). Structural equation models were constructed to analyze the effects of the occurrence of macular edema after pore-derived retinal detachment, and stratified regression was used to analyze the BCVA expression levels of different pathological features. Results After treatment, the serum total bilirubin (TB) content and peripheral neutrophil, lymphocyte ratio (NLR), best corrected visual acuity (BCVA) between the two groups (P <0.05). Diabetes mellitus, ocular artery systolic maximum flow velocity (OA-PSV), peak ocular artery end-diastolic flow velocity (OA-EDV), ophthalmic artery mean flow velocity (OA-MV), central retinal artery systolic maximum flow velocity (CRA-PSV), peak central retinal artery end-diastolic flow velocity (CRA-EDV), mean central retinal artery velocity (CRA-MV), maximum posterior ciliary artery systolic flow velocity (SPCA-PSV), and posterior ciliary short artery end-diastolic flow velocity (SPCA-EDV) are all macula Independent risk factors for oedema (P <0.05). The structural equation model was constructed. The various indicators of the model were good, and the convergent validity and combined reliability of the model were good. The nerve fiber layer, ganglion cell layer, inner tuxform layer, inner core layer and outer tuxform layer were all affected (P <0.05). Conclusion Elevations of diabetes mellitus, OA-PSV, OA-EDV, OA-MV, CRA-PSV, CRA-EDV, CRA-MV, SPCA-PSV, and SPCA-EDV are risk factors for postoperative macular edema in patients with pore-origin retinal detachment, which should be noted in clinical studies.
Congenital cataract (CC) is one of the most common causes of pediatric visual impairment. With the in-depth understanding of the etiology, clinical manifestations and pathogenic genes of CC, various CC category systems based on different classification criteria have been proposed. However, the application of CC category in clinical practice and scientific research is limited. It is challenging to obtain accurate information from a certain category, including morphological, etiological and genetic information, that could guide timely treatment or predict the prognosis. The purpose of this review is to discuss the status quo of CC category systems and the potential direction for future research in this field, with a focus on categorization principles and scientific and clinical application.
Background: Lacrimal duct obstruction is a common ophthalmic disease. Retrograde lacrimal duct catheterization has been commonly used for lacrimal duct stenosis or lacrimal duct obstruction. However, due to the purulent crust covering the lower end of the nasolacrimal duct, the nasolacrimal duct was often blocked again, resulting in recurrent dacryocystitis. Currently, endoscopic dacryocystorhinostomy (En-DCR) combined with removal of the nasolacrimal drainage tube can effectively treat this disease. Case presentation: We report a case of recurrent dacryocystitis caused by an old drainage silicone tube placed in the nasolacrimal duct for a long time. We performed En-DCR combined with the removal of the nasolacrimal drainage tube. Six months after surgery, lacrimal irrigation revealed patency of the lacrimal passage, and the anastomotic stoma was formed well. No related symptoms, such as epiphora or purulence, occurred again. Conclusion: If patients with lacrimal duct stenosis or lacrimal duct obstruction have undergone retrograde lacrimal duct catheterization, the nasolacrimal drainage tube should be removed in time according to the patient's postoperative recovery to prevent the abnormal crusts attached to the lower end of the drainage tube from blocking the nasolacrimal duct again, resulting in complications or recurrent dacryocystitis.
