Pentacam Accuracy in Discriminating Keratoconus From Normal Corneas: A Diagnostic Evaluation Study

Area of Science:

• Ophthalmology
• Corneal Imaging
• Diagnostic Accuracy

Background:

• Keratoconus diagnosis relies on accurate corneal imaging.
• Pentacam provides advanced corneal topographic indices.
• Differentiating keratoconus from normal corneas is crucial for patient management.

Purpose of the Study:

• To evaluate the diagnostic performance of Pentacam indices for keratoconus.
• To identify the most effective Pentacam index for distinguishing keratoconus from healthy corneas.

Main Methods:

• 150 keratoconus patients and 150 healthy controls were enrolled.
• Placido disk topography and Pentacam imaging were performed.
• Multiple logistic regression and ROC analysis were used to assess index performance.

Main Results:

• Keratoconus Index (KI), Index of Vertical Asymmetry (IVA), Thinnest Point (TP), and Maximum Keratometry (Kmax) detected keratoconus.
• IVA demonstrated the highest diagnostic ability with an Area Under Curve (AUC) of 95.24%.
• The combination of KI, IVA, Kmax, and TP achieved 78% correct detection.

Conclusions:

• Pentacam indices are valuable tools for keratoconus diagnosis.
• IVA is the superior single index for identifying keratoconus.
• A combination of Pentacam indices offers improved diagnostic accuracy.