Purpose: To evaluate the long-term outcome of corneal cross-linking (CXL) for pellucid marginal degeneration (PMD).
Methods: In a retrospective study, forty eyes of forty patients were enrolled. All ...subjects had undergone CXL for PMD at least 5 years before the assessments. Visual acuity, refraction, and topography data were compared to their respective values before CXL.
Results: The comparison between mean preoperative logMAR uncorrected visual acuity and 5-year postoperative evaluation revealed no significant change (1.20 ± 0.65 and 1.17 ± 0.64, P > 0.05). No statistically significant difference was noted comparing preoperative mean logMAR best-corrected visual acuity (BCVA) and postoperative mean logMAR BCVA (0.24 ± 0.19 and 0.22 ± 0.20, P > 0.05). We did not find any significant difference between pre- and postoperative spherical equivalent and spherical refractive errors (P = 0.419 and P = 0.396, respectively). Regarding the BCVA Snellen lines, 23 eyes had no significant change in pre- and postoperative examinations, 11 eyes had improvement, and 6 subjects showed worsening defined as significant when two or more lines change. The spherical equivalent refractive error improved in 4 subjects, was stable in 25, and worsened in 11 subjects, while a 0.5 diopter or more myopic change was considered significant. Furthermore, regarding steep keratometry values, 25 subjects were stable, 7 had improvements, and 8 worsened.
Conclusion: CXL appears to be a safe and effective procedure to halt the progression of PMD.
Abstract Background This review aims to substantiate the correlation between vitamin D and retinal vein occlusion (RVO) within the medical literature. Method A systematic review and meta-analysis ...were conducted in PubMed, SCOPUS, Web of Science, and Embase until December 10th, 2023. A meticulous literature search was undertaken to identify and analyze all observational-analytical papers reporting vitamin D levels in RVO patients. The principal outcome measures centered on the comparative assessment of vitamin D levels between patients with RVO (cases) and those devoid of RVO (controls). The protocol was registered in PROSPERO (code: CRD42024499853). Results A total of six relevant studies consisting of 589 participants were included in this meta-analysis. The results indicated a significant association between vitamin D deficiency and increased risk of RVO (Odds ratio = 14.51; 95% CI: 1.71, 122.59, P = 0.014); and patients with RVO exhibited a significant decrease in serum vitamin D levels by 1.91ng/mL (95% CI: -2.29, -1.54, P < 0.001). Moreover, there was no significant difference observed in vitamin D levels between central RVO (CRVO) and branch RVO (BRVO) subtypes ( P = 0.63). Conclusion RVO patients have more vitamin D deficiency than healthy controls. These results contribute to the growing body of evidence highlighting the intricate role of vitamin D supplementation as both a prophylactic and a treatment strategy in RVO. PROSPERO registration identifier : CRD42024499853.
Abstract Background To investigate the subfoveal retinal and choroidal thickness in patients with unilateral Fuchs Uveitis Syndrome (FUS). Methods This comparative contralateral study was performed ...in affected eyes with FUS versus fellow eyes. For each eye parameters such as subfoveal choroidal thickness (SCT), subfoveal choriocapillary thickness (SCCT), central macular thickness (CMT), and central macular volume (CMV) were measured; then the measured values of affected and fellow unaffected eye were compared. Results Thirty-seven patients (74 eyes) including 19 females (51.4%) with a mean age of 36.9 ± 7.6 years were enrolled. The mean SCT was lower in the affected eyes (344.51 ± 91.67) than in the fellow (375.59 ± 87.33) with adjusting for duration of disease and axial lengths ( P < 0.001). The mean SCCT, CMT, and CMV were higher in eyes with FUS than in fellow eyes ( P < 0.05). Conclusions The result of our study demonstrated that affected eyes in patients with FUS tend to have thinner SCT and thicker SCCT and CMT compared to uninvolved fellow eyes.
Key Clinical Message
In Hurler syndrome, corneal opacification is a common finding but rarely manifests as hypertrophic scars. A 6‐year‐old boy with Hurler syndrome had a hypertrophic scar on his ...left eye, which was successfully treated with superficial keratectomy.
Hypertrophic scar on the cornea in patient with Hurler syndrome.
Retina is an important body organ responsible for human vision. There are many important retinal diseases which may damage the vision and even cause blindness. Optical Coherence Tomography (OCT) is ...an important tool for verifying and evaluating retina. Moreover, retina is a window to brain and since the imaging from retina is simpler than brain, valuable information from brain can be obtained through retinal imaging. In fact, many neuro-degenerative diseases can be followed through retinal OCT images. Texture refers to the way of locating pixels with different intensity values in an image neighborhood. In this paper, the purpose is to provide a review on the methods which focus on the anomaly detection in OCT images. Also, the role of texture in the identification of retinal diseases is discussed in detail. Different texture descriptors in image processing applications are introduced and the methods which utilized them for the mentioned purpose are explained. In addition, different retinal diseases are classified in several classes and the texture-based methods suggested for each class of diseases are separately described.
