Glaucoma is called to a group of eye disorders with different reasons, but it is a clinical effect which is common on eye and eye nerve. It is related to internal eye pressure. This disease can damage the infected eye for ever and if it is not cured, it can lead to blindness. 


   Early stages
  • Losing peripheral sight in little areas of visibility
  • Blur vision on one side in directing visibility 

   Advanced stages
  • Increasing the lost areas of vision, usually both eyes
  • Stiffening of eyeball
  • Existence of Blind spots in visibility
  • Inappropriateness of vision at night