MATERIAL AND METHODS: A cross-sectional, hospital-based study was conducted from 2022 to 2024 at Hospital Shah Alam and Hospital Pakar Universiti Sains Malaysia. A total of 109 Malay children aged 7-17 years participated, including 88 with myopia and 21 with emmetropia. Each participant underwent a comprehensive ocular examination, including non-cycloplegic refraction and axial length measurement. Choroidal thickness was assessed using Cirrus SD-optical coherence tomography, with one eye from each subject randomly selected for analysis.
RESULTS: The mean subfoveal choroidal thickness was significantly thinner in myopic children (284.91 μm) compared to emmetropic children (347.62 μm) (p<0.001). Additionally, choroidal thickness varied significantly with the degree of myopia: mild myopia had a mean subfoveal thickness of 319.69 μm, moderate myopia 290.04 μm, and high myopia 225.72 μm, with high myopia showing the thinnest choroid (p<0.001). A significant negative correlation was observed between axial length and subfoveal choroidal thickness, while a positive correlation was found between spherical equivalent and choroidal thickness. No significant correlation was identified between age and subfoveal choroidal thickness.
CONCLUSION: Malay children with myopia exhibit a thinner mean choroidal layer compared to their emmetropic peers, with the thinnest choroid observed in cases of high myopia. This indicates that thinning of the choroidal vasculature occurs with the increase in axial length and worsening severity of myopia.
METHODS: This was a cross-sectional observational study. From 2013 to 2014, we recruited inhabitants aged 50 years or older in Guangzhou, China. Among 1,117 participants in the study, data from 1,015 phakic right eyes were used for analyses. Ocular parameters including axial length (AL), anterior chamber depth (ACD), and corneal curvature (K) were measured using an IOL Master.
RESULTS: The mean AL, ACD, and K were 23.48 mm [95 % confidence interval (CI), 23.40-23.55], 3.03 mm (CI, 3.01-3.05), and 44.20 mm (CI, 44.11-44.29), respectively. A mean reduction in ACD with age was observed (P = 0.002) in male subjects but not in female subjects (P = 0.558). Male subjects had significantly longer ALs (23.68 mm versus 23.23 mm, P axial elongation had a flatter cornea (r = -0.437, P
PURPOSE: The purposes of this study were to compare SFCT in PE, normal pregnant, and nonpregnant women using spectral domain optical coherence tomography and to correlate SFCT with severity of pre-eclampsia.
METHODS: A cross-sectional, observational study was performed. A total of 150 participants were divided into three groups: group 1 (50 PE women), group 2 (50 normal pregnant women), and group 3 (50 nonpregnant healthy women). Subfoveal choroidal thickness was measured using spectral domain optical coherence tomography. Other parameters including mean arterial blood pressure (MABP), central corneal thickness, macular thickness, IOP, ocular perfusion pressure (OPP), and urine protein-to-creatinine ratio were also measured. ANOVA and Pearson correlation analysis were used to look at differences between the groups. P < .05 was considered as statistically significant.
RESULTS: The MABP was higher in group 1 than in groups 2 and 3 (103.0 ± 12.9 vs. 83.2 ± 9.8 vs. 89.5 ± 7.2 mmHg, respectively; all P < .001). The SFCT of the PE group was higher than in groups 2 and 3 (370.7 ± 23.8 vs. 344.5 ± 30.8 vs. 315.8 ± 49.9 μm, respectively; all P < .001). There were no statistically significant differences in central corneal thickness, macular thickness, or IOP between the PE and healthy pregnant groups (all P > .05). The OPP was greater in PE patients (52.8 ± 8.5 vs. 41.9 ± 6.9 vs. 43.4 ± 5.2 mmHg, respectively; both P < .001). The SFCT was positively correlated with MABP (r = 0.464, P < .001), OPP (r = 0.495, P < .001), and urine protein-to-creatinine ratio (r = 0.635, P < .001) in the PE group.
CONCLUSIONS: Subfoveal choroidal thickness is higher in pre-eclampsia and is proportional to established markers of severity of the condition. This parameter might serve as a novel predictive marker for the severity of pre-eclampsia.