Introduction<br />Intraocular pressure (IOP)—commonly associated with glaucoma or ocular hypertension—refers to the pressure exerted by the aqueous humor (intraocular fluid) against the walls of the eye. This fluid is essential for maintaining the eye’s shape and supporting its visual functions. When IOP exceeds normal physiological levels, it may indicate underlying health concerns, particularly glaucoma.<br />The Impact of Corneal Thickness on IOP Measurements<br />Corneal thickness plays a significant role in the accuracy of IOP readings. Specifically:<br />• Thicker corneas tend to yield falsely high IOP readings,<br />• Thinner corneas may result in falsely low readings.<br />If corneal thickness is not considered during IOP assessment, there is a risk of misdiagnosing glaucoma. For example, a person with naturally thick corneas may be incorrectly diagnosed with elevated IOP, while someone with thin corneas may have dangerously high actual IOP that goes undetected.<br />Relationship Between Corneal Thickness and Glaucoma Risk<br />Patients with thin corneas may have a true intraocular pressure that is higher than measured, thereby increasing their risk of developing glaucoma. This discrepancy between actual and measured IOP makes central corneal thickness (CCT) a crucial parameter in glaucoma risk assessment.<br />Clinical Interpretation and Technological Integration<br />Measuring corneal thickness—typically within the range of 525 to 560 micrometers—is now considered an essential factor in evaluating IOP in glaucoma patients. For instance, a patient with IOP readings above 21 mmHg but a thick cornea may not actually have glaucoma. Conversely, patients with thinner corneas and borderline readings may still be at high risk.<br />Recognizing this, many modern tonometry devices now include CCT measurement capabilities, allowing for more accurate and individualized glaucoma screening and diagnosis.<br /><br />Conclusion<br />Central corneal thickness is a critical diagnostic variable in the management of ocular hypertension and glaucoma. Its inclusion in routine IOP assessments helps ensure accurate interpretation of intraocular pressure, reduces misdiagnosis, and enables timely intervention—ultimately protecting patients from irreversible vision loss.<br />