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Cornea & External Diseases

















Surgery & Complications
Astigmatism post penetrating keratoplasty is satisfactorily corrected with contact lens.

  • Symptoms: limited visual acuity despite clear corneal graft.
  • Causes:
    • More frequently occurs in eyes with pre-operative keratoconus, severe scaring, or corneoscleral defect.
    • Irregular suture placement, uneven suture tightness or technical error during the corneal button trephination.
    • Sometimes donor astigmatism.
  • Management:
    • Suture manipulation or removal for tension redistribution.
    • May be corrected with eyeglasses or contact lenses.
    • In cases where refractive corrections do not provide satisfactory vision due to high residual astigmatism, a variety of surgical options may be employed such relaxing incisions, compression sutures, excimer laser photoastigmatic refractive keratectomy or LASIK.

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