Monitoring the transition from corneal ulceration to healed scar using a Scheimpflug tomography-based densitometry.
Graefes Arch Clin Exp Ophthalmol
; 262(7): 2189-2198, 2024 Jul.
Article
in En
| MEDLINE
| ID: mdl-38349421
ABSTRACT
PURPOSE:
To compare corneal haze between active ulcer and healed scarring using a Scheimpflug densitometry. MATERIALS ANDMETHODS:
A prospective longitudinal study enrolled 30 patients (30 eyes) with ulcerative keratitis (UK). Each subject's corneal optical density (COD) was measured with a Scheimpflug corneal densitometry, Pentacam® AXL (Oculus GmbH, Wetzlar, Germany), at the active ulcerative and complete scarring stage. The COD data were analyzed through distinct methods (inbuilt, sorted annular partitions, and ulcer-matching densitometric maps). We compared different CODs to select the better index for clinically monitoring the transition from corneal ulceration to healed scar.RESULTS:
The CODs of the periphery (P = 0.0024) and outside of the active ulcer (P = 0.0002) significantly decreased after scarring. Partitioning the cornea into different depths and annular zones, the anterior layer, center layer, and the 2-6 mm annular zone had a more remarkable COD decrease after scar formation. The 3rd-sorted COD in the anterior layer revealed the highest area under the receiver-operating characteristic curves (0.709), in which 90% of subjects had COD reduction during the ulcer-to-scar transition.CONCLUSIONS:
Aside from subjective judgment based on clinical signs, the Scheimpflug tomography-based densitometry could provide objective and efficient monitoring of the corneal opacity evolution in UK patients. Because the 3rd-sorted annular COD is a better index than the inbuilt or mapping CODs in differentiating active ulcers from healed scars, this COD could be a clinically promising parameter to monitor the progression of UK patients.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Corneal Ulcer
/
Cornea
/
Densitometry
Type of study:
Observational_studies
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Language:
En
Journal:
Graefes Arch Clin Exp Ophthalmol
Year:
2024
Document type:
Article