Ocular Hypertension Linked to Higher CCT, Longer AL

Correcting IOP for biomechanical influences can improve detection of risk factors for glaucoma in certain patients. This study used metrics from the Corvis ST. Photo: Oculus. Click image to enlarge. Early detection and effective management of ocular hypertension (OHT) are crucial for preventing the development of glaucoma. Thus, it is important to understand what clinical characteristics of OHT can help indicate a risk of glaucoma. To help, researchers of a recent study analyzed various factors and found that structural features of the anterior segment and cornea are more likely to be critical factors in the pathophysiology of OHT than refractive status or estimates of biomechanical intraocular pressure (IOP) alone. The findings were reported in BMC Ophthalmology.No correlation was found between IOP and several variables in OHT patients such as age, central corneal thickness (CCT), retinal nerve fiber layer thickness, average cup-to-disc ratio, vertical cup-to-disc ratio, various visual field metrics, axial length (AL), anterior chamber depth, corneal curvature, lens thickness and number other values obtained in the study.A total of 60 OHT patients (120 eyes) and 60 healthy controls (120 eyes) underwent cross-sectional and case-control analyses using measurements like IOP, visual acuity and anterior segment OCT imaging of the angle. Biomechanically corrected IOP (bIOP) was measured using the Corvis ST to account for the influence of CCT.OHT patients had significantly higher values for bIOP, axial length, angle opening distance and nasal length of trabecular meshwork (the distance from Schwalbe’s line to the scleral spur), as well as a more negative SE. “These observations support the notion that structural features of the anterior segment and cornea are more likely to be critical factors in the pathophysiology of OHT than is refractive status or estimates of biomechanical IOP alone, thus justifying the importance of comprehensive anterior segment imaging in risk stratification,” the authors explained in their paper.The positive correlation between IOP and bIOP suggests a link between biomechanical properties of the cornea and overall ocular pressure dynamics and can be critical in understanding the predictive markers for diseases like glaucoma, the authors noted.The negative correlation between IOP and SE aligns with findings that myopic eyes, particularly in high myopia, show structural changes influencing IOP.CCT was shown to be associated with higher IOP, but because it could influence IOP measurement, corneal thickness cannot be regarded as an independent risk factor of OHT or glaucoma, the authors wrote.No statistically significant differences were found in IOP across different grades of iris crypt, furrow or color.“These observations indicate that certain structural characteristics of the anterior segment and cornea are of paramount importance in OHT, which emphasizes the necessity of high-resolution anterior segment assessment as part of risk stratification and early treatment,” the authors wrote in their BMC Ophthalmology paper.Click here for the journal source. Hu F, Luo L, Yang H, et al. Clinical characteristics and risk factors of ocular hypertension: a case-control study. BMC Ophthalmology. July 11, 2025. [Epub ahead of print.] This article was developed by the editorial staff in conjunction with experts in the field. In the process, AI may have been among the editorial tools used to meet the goals of human editors, who approved all content.