Juvenile-Onset Open-Angle Glaucoma

Juvenile-onset open-angle glaucoma (JOAG) is a type of primary open-angle glaucoma diagnosed in individuals aged 4 to 40. This condition can be either familial or sporadic, with varying proportions among different populations. Among the known genetic foci related to this condition, myocilin (MYOC) mutations are the most common. Some other related genes include CYP1B1 and LTBP2. Clinically, JOAG is characterized by elevated intraocular pressures, which can sometimes be resistant to medical therapy. The underlying pathophysiology involves immature conventional outflow pathways, which may be identified on gonioscopy as an abnormally high iris insertion with or without prominent iris processes. In some cases, the angle may appear featureless, lacking discernible landmarks. The iris may also show dysgenetic features in the form of absent or very prominent iris crypts. The optic discs are usually large with deep, steep cupping secondary to high pressure-induced damage. Medical management, selective laser trabeculoplasty, and invasive surgeries are the usual treatment options. Due to the often refractory nature of the condition, many patients end up requiring surgery. Minimally invasive glaucoma surgeries are showing promise and may be attempted initially. However, trabeculectomy remains the gold standard. Since JOAG affects the younger population of society, the projected disability from this condition is significant. Early diagnosis, stringent management, and long-term monitoring play a vital role in preventing disease progression.