The eye diseases that result in damage to the optic nerve and cause vision loss are classified as glaucoma. The primary types of glaucoma are open-angle glaucoma and closed-angle glaucoma. Open-angle glaucoma usually develops gradually over time. It is not painful. Closed-angle glaucoma may develop gradually or may appear suddenly. It involves severe eye pain, redness in the eye and blurred vision. The vision loss caused due to it is permanent. Diagnostic methods include tonometry, gonioscopy, examination of the cup-to-disc ratio, visual field test, scanning laser ophthalmoscopy and pachymetry. Glaucoma drops, argon laser trabeculoplasty and canaloplasty are useful in treating glaucoma. This book includes some of the vital pieces of work being conducted across the world on various topics related to glaucoma. It presents researches and studies performed by experts across the globe. This book is a vital tool for all researching or studying ophthalmology as it gives incredible insights into its diagnosis and treatment.