This ppt shows the crucial novel upgrade in the KC classification and early detection.

1. KERATOCONUS: ABCD
Taher Eleiwa, MD PhD
Lecturer of Ophthalmology, Benha University, Benha, Egypt
Fellow of Cornea and External eye diseases, Bascom Palmer Eye Institute, Miami, FL, USA

2. Disclosures
None

3. Agenda
Clinical
diagnosis
Global Consensus of
Keratoconus and Ectatic
Diseases
Exclusion zone on the
posterior surface
Belin ABCD Keratoconus
Staging/Grading
Why not just following
the the BAD to assess
progression?
Differences between
the Belin/Ambrosio
Display and the Belin
ABCD Progression
display
Basics of the Belin
Progression Display
Clinical examples
Conclusion

4. Keratoconus
Progressive
Non-
inflamatory
Focal
weakening
Irregular
astigmatism
Steepening Thinning

5. Holy Grail
•Earliest possible
diagnosis
•Preserve/improve
vision

6. Clinical
diagnosis
VISION

7. Why a new
system?
• The Asia Cornea Society
• The Cornea Society
• EuCornea
• The Panamerican Cornea
Society (PanCornea)

8. What did they conclude?

9. Amsler–
Krumeich
classification

10. Why a new
progression
display?

11. Prior
progression
parameters

13. BAD display

17. Isn’t BAD enough?

20. BAD Vs ABCD

21. BAD Vs ABCD

30. ABCD

31. 77 eyes of 63 patients who met:
“THE 1 DIOPTER KMAX
REQUIREMENT FOR CXL”,
a historical review of their
tomographic records showed that
more than 50% the patients could
have been identified, on average, 5
months earlier using the ABCD
Progression Display.

33. CONCLUSION
• The ABCD Progression Display should allow the
clinician to:
• diagnose progressive disease at an earlier time frame than
was previously possible with earlier systems
• earlier intervention >> prevent visual loss >>> not just
stabilizing visual loss after it has already occurred.

34. References
Gomes, José AP, et al. "Global consensus on keratoconus and ectatic
diseases." Cornea 34.4 (2015): 359-369. Belin, Michael W., Hyun Soo Jang, and Mark Borgstrom. "Keratoconus:
Diagnosis and Staging." Cornea (2021).