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Table 2 List of parameters measured by the Pentacam HR System, UHR-OCT and submitted to the neural network classifier for discriminating sub KC and KC corneas from normal healthy corneas

From: Machine learning helps improve diagnostic ability of subclinical keratoconus using Scheimpflug and OCT imaging modalities

Pentacam HR System Parameters

 

UHR-OCT Parameters

Curvature-Derived Parameters

Elevation-Derived Parameters

Pachymetry-Derived Parameters

Integrated Parameters

OCT-Derived Parameters

Anterior surface:

Anterior surface:

Thinnest point

ISV

Epithelium

Bowman’s Layer

Stroma

K1 (Front)

Emax (Front)

Corneal Volume

IHA

EPSD

BPSD

SPSD

K2 (Front)

Ecenter (Front)

 

IVA

EPV

BPV

SPV

Km (Front)

  

IHD

EEI (I/S)

BEI(I/S)

SEI(I/S)

Kmax (Front)

  

KI

EEI-MAX (I/S)

BEI-MAX (I/S)

SEI-MAX (I/S)

Posterior surface:

Posterior surface:

 

Rmin

EMean (total)

BMean (total)

SMean (total)

K1 (Back)

Emax (Back)

 

CKI

Emean (I)

Bmean (I)

Smean (I)

K2 (Back)

Ecenter (Back)

  

Emean (S)

Bmean (S)

Smean (S)

Km (Back)

   

Emin (I)

Bmin (I)

Smin (I)

Kmax (Back)

   

Emax (S)

Bmax (S)

Smax (S)

  1. UHR-OCT= ultra-high resolution optical coherence tomography; Sub KC= subclinical keratoconus; KC= keratoconus; K1= flattest keratometric reading; K2= steepest keratometric reading; Km= mean keratometric reading; Kmax= maximum keratometric reading; Emax= maximum elevation reading; Emin= minimum elevation reading; Ecenter= corneal central elevation reading; ISV= index of surface variance; IHA= index of height asymmetry; IVA= index of vertical asymmetry; IHD= index of height decentration; KI= keratoconus index; Rmin= smallest radius; CKI= central keratoconus index; EPSD, BPSD, SPSD: standard deviation of thickness profile between individual and normal pattern of epithelium, Bowman’s layer and stroma; EPV, BPV, SPV: profile variation of epithelium, Bowman’s layer or stroma thickness profile within each individual; EEI (I/S), BEI (I/S), SEI (I/S): ectasia index of epithelium, Bowman’s layer or stroma; EEI-MAX (I/S), BEI-MAX (I/S), SEI-MAX (I/S): Maximum ectasia index of epithelium layer, Bowman’s layer or stroma; EMean (total); BMean (total); SMean (total): mean thickness of epithelium, Bowman’s layer or stroma; EMean (I), Bmean (I), Smean (I): mean inferior thickness of epithelium; Bowman’s layer or stroma; EMean (S), Bmean (S), Smean (S): mean superior thickness of epithelium; Bowman’s layer or stroma; Emin (I), Bmin (I), Smin (I): the thinnest thickness of the inferior epithelium; Bowman’s layer or stroma thickness map; Emax(S), Bmax(S), Smax (S): the thickest thickness of the superior epithelium; Bowman’s layer or stroma thickness map
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Eye and Vision

ISSN: 2326-0254