The cup: disc ratio (gives the number) is increased. There is 
notching at the neuroretinal rim (usually inferiorly and best 
seen where the retinal vessels enter the disc. The sharp turning 
of the blood vessels is described as bayoneting).

Other examination:

  • look at the opposite eye for any cup asymmetry
  • look for signs of medical or surgical treatment for the 

  • glaucoma and also for any secondary causes of glaucoma
    (refer to common cases in glaucoma)


1. What changes may occur in the opitc disc in glaucoma?


2. What is the name of this lens and how does it differ from Goldmann's contact lens?

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