Should Pellucid Marginal Degeneration Be Managed Differently Than Keratoconus?

  • Mayank A. NanavatyEmail author
  • Ahmed Shalaby Bardan


PMD is a challenging condition especially when the patient present in an advanced state with high irregular astigmatism, extreme inferior thinning and loss of best corrected visual acuity even by the conservative methods like scleral gas permeable contact lenses. It is vital to know the differential diagnoses for accurate differentiation of PMD from other ectatic conditions. The surgical options can be selected based on whether the PMD is progressing or is stable. These surgical options are different to keratoconus as the risk of ectasia recurrence in peripheral host always remains. This chapter describes these options in detail. Appropriate titration of the management option is vital for successful outcomes in cases with PMD.


Pellucid Marginal degeneration Keratoconus Corneal ectasia 


Financial Interests

The author does not have any financial or proprietary interest in any product or procedure mentioned in this chapter


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Brighton & Sussex Medical SchoolUniversity of SussexBrightonUK
  2. 2.Sussex Eye HospitalBrighton & Sussex University Hospitals NHS TrustBrightonUK

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