Determining Progression in Ectatic Corneal Disease.

Area of Science:

• Ophthalmology
• Corneal Imaging
• Refractive Surgery

Background:

• Traditional diagnosis of ectatic disease was limited to advanced stages, often after visual impairment.
• Corneal cross-linking (CXL) emerged as a treatment to halt keratoconus progression, increasing the need for early detection methods.
• Existing methods for tracking keratoconus progression lacked standardization.

Purpose of the Study:

• To introduce and validate the Belin ABCD classification/staging system for diagnosing and monitoring ectatic corneal diseases.
• To enable earlier detection of subclinical or early-stage keratoconus.
• To provide a tool for clinicians to confidently diagnose progressive disease and intervene earlier.

Main Methods:

• Utilized Scheimpflug imaging (Pentacam) to gather data for the ABCD system.
• The ABCD system incorporates four parameters: Anterior curvature (A), posterior curvature (B), minimal corneal thickness (C), and best spectacle visual acuity (D).
• Objective measurements (A, B, C) are used to track changes over time, with the ABCD Progression Display visualizing statistical changes.

Main Results:

• The ABCD system allows for the detection of earlier ectatic disease before significant visual loss or subjective complaints.
• Objective parameters (A, B, C) provide quantifiable data for assessing disease progression.
• The ABCD Progression Display highlights statistically significant changes, indicating progression.

Conclusions:

• The Belin ABCD classification system, integrated with tomographic imaging, significantly improves the early diagnosis of progressive keratoconus.
• This system empowers clinicians to identify disease progression earlier than previously possible.
• Early diagnosis and intervention facilitated by the ABCD system can help prevent irreversible visual loss.