CLINICAL SIGNIFICANCE OF CORNEAL BIOMECHANICAL INDICES IN MYOPIA SUMMARY

Abstract

The prevalence of myopia is rising globally, projected to affect 45-50% of the population by 2050. Accurate assessment of corneal biomechanics is critical in refractive surgery to predict outcomes and complications such as keratectasia, keratoconus, and glaucoma. The Corvis ST device provides detailed evaluation of corneal biomechanical parameters, including the Corvis Biomechanical Index (CBI) and Tomographic Biomechanical Index (TBI), which aid clinical decision-making and postoperative monitoring.

Purpose – to evaluate corneal biomechanical properties and the clinical significance of CBI and TBI in patients with varying degrees of myopia using the Corvis ST device.

Material and methods
This prospective study included 56 patients (103 eyes) with mild, moderate, or high myopia, examined at “NAZAR Eye Center” in 2025. All patients underwent full ophthalmologic assessment, Pentacam tomography, and Corvis ST biomechanical measurements. Exclusion criteria included pre-existing ocular disease or prior surgery. Data were analysed using SPSS and MedCalc (p < 0.05).

Results
High myopia was associated with increased axial length, thinner central corneal thickness (CCT), and higher CBI and TBI values. Other biomechanical parameters also showed significant trends with increasing myopia. These findings provide important predictive information for refractive surgery and long-term ocular health.

Conclusion
Corvis ST biomechanical assessment reliably identifies high-risk eyes and guides surgical planning. Patients with high myopia exhibit increased biomechanical parameters, emphasizing the importance of preoperative evaluation.