• Increase in cup disc ratio is known as cupping
  • Occurs in glaucoma
  • Degree of cupping can be correlated with stage of glaucoma
    • Normal cup disc ratio is 0.3 – 0.4
    • In early glaucoma – 0.6
    • In advanced glaucoma – 0.7 – 0.9
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Cup disc ratio

Ratio of the size of optic cup to that of the optic disc Normally 0.3 to 0.4 Increased in case...