Study Status: Completed
Recruit Status: Completed
Study Type: Observational
Official Title: Change in Corneal Endothelium After Glaucoma Surgery; Trabeculectomy and Glaucoma Implant Surgery
Brief Summary: The purpose of this trial is to study the change in corneal endothelial cell after glaucoma surgery, non-contact specular microscopic examination is performed for the patients who underwent glaucoma surgery; trabeculectomy and Ahmed glaucoma valve implant surgery prospectively. Change in corneal endothelial cell density, hexagonality, and coefficient of variation of cell area will be analyzed and compared to the baseline and between the types of the surgeries.