Table 7.
Keratoglobus (KG) | Keratoconus (KC) |
---|---|
Entire cornea is thinned out in KG | Central and paracentral thinning occurs in KC |
Bilateral, presents since birth | Bilateral or Unilateral, presents at any age after birth usually in second or third decade |
Non- Progressive disorder No association with Down’s syndrome commonly |
Progressive condition KC is common in Down’s syndrome children (incidence is 5.5% - 15%) |
Associated with autosomal recessive pattern of inheritance | Usually isolated condition |
Prone for rupture following trivial trauma | Corneal rupture is uncommon in KC |
Optical rehabilitation with glasses is usually indicated in KG | Contact lens rehabilitation can be offered for visual rehabilitation in KC patients |
Keratoplasty carries poor prognosis due to proximity of limbus. Recommended surgical techniques such as Tuck-in lamellar keratoplasty (TILK) are more demanding | Keratoplasty and DALK procedures carry the good prognosis in advanced cases |