Ocular biometric changes after Ahmed glaucoma valve implantation

Area of Science:

• Ophthalmology
• Glaucoma Surgery
• Ocular Biometry

Background:

• Glaucoma is a leading cause of irreversible blindness.
• Refractory glaucoma often requires surgical intervention to manage intraocular pressure (IOP).
• Ahmed glaucoma valve (AGV) implantation is a surgical option for complex glaucoma cases.

Purpose of the Study:

• To evaluate ocular biometric changes following uneventful Ahmed glaucoma valve implantation.
• To assess the impact of AGV implantation on refractive status, IOP, and anterior segment parameters.

Main Methods:

• Prospective study including patients with refractory glaucoma undergoing AGV surgery.
• Exclusion of patients with prior corneal surgery.
• Evaluation of intraocular pressure, axial length, keratometry, anterior chamber depth, volume, and angle at baseline and 1, 3 months post-surgery.

Main Results:

• Significant reduction in intraocular pressure (33.4 to 13.5 mm Hg) and medication use (3.6 to 1.0) at 3 months post-AGV implantation (p < 0.001).
• Significant decrease in axial length from 23.69 to 23.47 mm at 3 months (p < 0.001).
• No significant changes observed in keratometry or other anterior chamber parameters at 3 months (p > 0.05).

Conclusions:

• Ahmed glaucoma valve implantation effectively lowers intraocular pressure and reduces medication dependency.
• AGV implantation demonstrates a significant effect on axial length but not on keratometry or other anterior chamber parameters at 3 months post-surgery.