Status:
COMPLETED
The Characteristics of Backscattering With Depth in the Progression of Keratoconus
Lead Sponsor:
Tianjin Eye Hospital
Conditions:
Elasticum, Incomplete Pseudoxanthoma
Eligibility:
All Genders
Brief Summary
To investigate the variation in backscattering with depth between forme fruste keratoconus (FFKC), keratoconus, and normal eyes; to determine the backscattering changes in the characteristics of kerat...
Detailed Description
To investigate the variation in backscattering with depth between forme fruste keratoconus (FFKC), keratoconus, and normal eyes; to determine the backscattering changes in the characteristics of kerat...
Eligibility Criteria
Inclusion
- BCVA \<20/20 and a history of myopia or astigmatism;
- presence of any of the following positive signs on slit lamp examination: corneal stromal thinning, cone-shaped anterior protrusions, Fleischer's ring, Vogt's striae, epithelial or subepithelial scarring;
- abnormal corneal topography (maximum keratometry (K) value of \>47.2 diopters (D), bow-tie pattern with skewed radial axes, or inferior-superior asymmetry(3-mm I-S keratometric difference \>1.4 D).
Exclusion
- 1\. Patients with severe corneal scarring that affected light scattering and density maps showing "black holes" 2.Participatients with other corneal diseases 3. Eyes that have undergone surgery or trauma 4. Eyes with corneal dystrophy
- \-
Key Trial Info
Start Date :
January 1 2020
Trial Type :
OBSERVATIONAL
Allocation :
ACTUAL
End Date :
December 30 2022
Estimated Enrollment :
223 Patients enrolled
Trial Details
Trial ID
NCT06050629
Start Date
January 1 2020
End Date
December 30 2022
Last Update
September 22 2023
Active Locations (1)
Enter a location and click search to find clinical trials sorted by distance.
1
Tianjin Eye Hospital
Tianjin, Tianjin Municipality, China