The International Tinnitus Journal

Determining the Likelihood of Normotension Glaucoma (Ntg) Among the Patients with Increased Cup-To-Disc (C/D) Ratio

Author(s): Habib Ojaghi, Hamed Bakhtiari, Amin Najafi*, Ghasem Aboutalebi

Introduction: Glaucoma, a progressive eye disease associated with optic nerve damage and gradual vision loss, is primarily caused by elevated intraocular pressure. Increased pressure can lead to optic nerve compression and neuronal damage, resulting in visual impairment. Sometimes intraocular pressure is detected as being normal while optic nerve damage happens and cause increased C/D ration a variant called normotension glaucoma. This study aims to determine the frequency of Normotension Glaucoma (NTG) in patients with a high cup-to-disc ratio who were referred to the clinic. Materials and Methods: This cross-sectional descriptive study includes 100 patients with a cup-to-disc ratio above 0.3 and normal eye pressure. According to the perimetry printouts and optic nerve head OCT imaging, these patients were categorized into those with a physiological large cup or normotension glaucoma. Then the frequency of NTG was determined among individuals with a high cup-to-disc ratio. Demographic data, including age and gender, were recorded in the data collection forms and analyzed. Results: According to this study every person with increased C/D ratio and normal IOP have a 26% chance of glaucoma. The research findings also revealed a significant correlation between age, C/D ratio, Intraocular Pressure (IOP), and Retinal Nerve Fiber Layer (RNFL) thickness with NTG (P< 0.05). However, there was no significant association among gender and Central Corneal Thickness (CCT) with NTG. Conclusion: Comprehensive evaluation and imaging is mandatory for every one with enlarged C/D ratio even with normal IOP to prevent sever irreversible visual loss.

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