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[Corneal topography of keratoconus]
T Zarnowski1, D Haszcz, Z Zagórski
1Katedry i I Kliniki Okulistyki AM w Lublinie.
Klinika Oczna
|January 1, 1997
Summary
Computer-assisted videokeratography revealed distinct topographic patterns in keratoconus patients. Most cases showed peripheral steepening, with a consistent inferior corneal steepening observed across all patients.
Area of Science:
- Ophthalmology
- Corneal topography
- Keratoconus research
Background:
- Keratoconus is a progressive corneal ectasia.
- Understanding corneal topography is crucial for diagnosis and management.
Purpose of the Study:
- To evaluate the topographic characteristics of keratoconus patients.
- To analyze quantitative topographic parameters.
Main Methods:
- Utilized computer-assisted videokeratography (EyeSys).
- Analyzed 85 eyes from 46 keratoconus patients.
- Assessed parameters including apical power, central corneal power, irregular astigmatism, and corneal steepening.
Main Results:
- Two main topographic patterns identified: peripheral (71%) and central (29%) steepening.
- Observed significant enantiomorphism (mirror image symmetry) in topographic alterations between fellow eyes.
- Consistently found inferior mid-peripheral cornea steeper than superior cornea (I-S value).
Conclusions:
- Videokeratography is valuable for documenting anterior corneal surface changes in keratoconus.
- Topographic analysis provides insights into the pathogenesis of keratoconus.
- This technique aids in understanding the pattern of corneal involvement.