Closed or Narrow angle glaucoma (NAG) is a very different manifestation of the disease. In acute NAG the patient can lose permanent vision very rapidly and can go completely blind in hours. This is one of the few true ocular emergencies in eye care. In chronic NAG, the patient slowly loses optic nerve tissue due to the anatomy of the patient causing a mechanical reason for decreased outflow of intra-ocular fluid. These glaucoma sub-varieties are very serious and typically fast in their progression.
Work-up for CNAG patients need to have careful history, especially of eye pain (could be sub-acute attacks), headaches and feelings of pressure and redness of the eye. This is in contrast to open angle glaucoma patients as these are not typical symptoms of that disease. Pupils also take on a more important role and measurement of angle openness performed by skilled technicians and doctors. Careful examination of the patients anatomy and optic nerve are needed for diagnosis.
CNAG testing is no different than other glaucoma patients except that the depth and appearance of the anterior chamber becomes much more important in the evaluation and management of the case. Due to this fact, gonioscopy is done more often at the doctor’s discretion.
CNAG glaucoma is treated much differently than OAG. Laser peripheral iridotomy takes primary role here, with other treatments sometimes being needed in mixed mechanism cases. This treatment is easily performed in office at Newsom Eye as we have medical lasers on site for quick and effective management.