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TitelIs keratoconus a real ectasia: analysis of corneal surface area in normal eyes and keratoconus ?
DoelTo compare anterior and posterior corneal surface areas in normal cornea and keratoconus.
To correlate corneal surface area to corneal biometric values (white to white, maximal keratometry)
MethodesWe retrospectively analyzed 12 587 elevation maps from 8162 eyes and 7003 maps from 2041 keratoconus. Elevation maps were acquired by Orbscan II. Corneal surface areas were calculated using digital elevation model and extrapolation to real corneal diameter.
ResultatenAnterior and posterior surface areas and corneal diameter are larger in keratoconus. Surface areas are directly correlated to corneal diameter. Maximal keratometry is inversely proportional to corneal diameter.
In normal eyes, anterior and posterior surface areas are inversely correlated to maximal keratometry. In keratoconus, corneal surface areas don’t increase with maximal keratometry.
ConclusieKeratoconus should not be considered as a real ectasia but greater as an isometric deformation with a central steepening and a peripheral flattening.
BelangenverstrengelingNee
Auteur 1
NaamCRAHAY
InitialenF-X
InstituutCHR Citadelle
StadLiège
Auteur 2
NaamDebellemaniere
InitialenG
InstituutFondation Ophtalmologique Adolphe de Rothschild
StadParis
Auteur 3
NaamGhazal
InitialenW
InstituutFondation Ophtalmologique Adolphe de Rothschild
StadParis
Auteur 4
NaamTobalem
InitialenS
InstituutFondation Ophtalmologique Adolphe de Rothschild
StadParis
Auteur 5
NaamMorant
InitialenS
InstituutFondation Ophtalmologique Adolphe de Rothschild
StadParis
Auteur 6
NaamRampat
InitialenR
InstituutFondation Ophtalmologique Adolphe de Rothschild
Stadparis
Auteur 7
NaamGatinel
InitialenD
InstituutFondation Ophtalmologique Adolphe de Rothschild
StadParis
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