Corneal biomechanical changes in allergic conjunctivitis.
Allergic conjunctivitis
Corneal biomechanics
Corneal densitometry
Corneal epithelial thickness mapping
Corneal tomography
Journal
Eye and vision (London, England)
ISSN: 2326-0254
Titre abrégé: Eye Vis (Lond)
Pays: England
ID NLM: 101664982
Informations de publication
Date de publication:
03 May 2021
03 May 2021
Historique:
received:
30
10
2020
accepted:
13
04
2021
entrez:
3
5
2021
pubmed:
4
5
2021
medline:
4
5
2021
Statut:
epublish
Résumé
To explore corneal biomechanical changes, identify related factors and determine early indicators of keratoconus (KC) development risk in allergic conjunctivitis (AC) patients. A total of 50 patients, including 20 eyes without AC and 30 eyes with AC were enrolled in this study. All patients underwent a complete ocular examination, including evaluations of clinical manifestations of AC, corneal tomography and densitometry by Pentacam, corneal biomechanics by Corvis ST, and corneal and epithelial thickness mapping by RTvue optical coherence tomography (OCT). The index of surface variance (ISV), index of vertical asymmetry (IVA), keratoconus index (KI), index of height decentration (IHD) and Belin/Ambrosio enhanced ectasia total deviation index (BAD-D) were significantly higher in the AC group than in the non-allergic conjunctivitis (NAC) group (P < 0.05). The tomography and biomechanical index (TBI) was also significantly higher in the AC group (P = 0.04). The average epithelial thickness in the 2-7 mm annulus was significantly thinner in the AC group than in the NAC group (P < 0.05). The average densitometry of the total cornea and the anterior layer were higher in the AC group than in the NAC group (P < 0.001). The ISV, IVA, KI, IHD and BAD-D were significantly correlated with the TBI and changes in corneal epithelial thickness in AC patients (P < 0.05). The changes in epithelial thickness were closely related to the eye rubbing frequency and allergic sign scores (P < 0.05). AC patients should be advised to routinely undergo corneal tomographic and biomechanical measurements, and the TBI could be used as an indicator of KC development risk in AC patients. Corneal Biomechanical Changes of Allergic Conjunctivitis, NCT04299399 . Registered March 3, 2020 - Retrospectively registered.
Sections du résumé
BACKGROUND
BACKGROUND
To explore corneal biomechanical changes, identify related factors and determine early indicators of keratoconus (KC) development risk in allergic conjunctivitis (AC) patients.
METHODS
METHODS
A total of 50 patients, including 20 eyes without AC and 30 eyes with AC were enrolled in this study. All patients underwent a complete ocular examination, including evaluations of clinical manifestations of AC, corneal tomography and densitometry by Pentacam, corneal biomechanics by Corvis ST, and corneal and epithelial thickness mapping by RTvue optical coherence tomography (OCT).
RESULTS
RESULTS
The index of surface variance (ISV), index of vertical asymmetry (IVA), keratoconus index (KI), index of height decentration (IHD) and Belin/Ambrosio enhanced ectasia total deviation index (BAD-D) were significantly higher in the AC group than in the non-allergic conjunctivitis (NAC) group (P < 0.05). The tomography and biomechanical index (TBI) was also significantly higher in the AC group (P = 0.04). The average epithelial thickness in the 2-7 mm annulus was significantly thinner in the AC group than in the NAC group (P < 0.05). The average densitometry of the total cornea and the anterior layer were higher in the AC group than in the NAC group (P < 0.001). The ISV, IVA, KI, IHD and BAD-D were significantly correlated with the TBI and changes in corneal epithelial thickness in AC patients (P < 0.05). The changes in epithelial thickness were closely related to the eye rubbing frequency and allergic sign scores (P < 0.05).
CONCLUSIONS
CONCLUSIONS
AC patients should be advised to routinely undergo corneal tomographic and biomechanical measurements, and the TBI could be used as an indicator of KC development risk in AC patients.
TRIAL REGISTRATION
BACKGROUND
Corneal Biomechanical Changes of Allergic Conjunctivitis, NCT04299399 . Registered March 3, 2020 - Retrospectively registered.
Identifiants
pubmed: 33934706
doi: 10.1186/s40662-021-00241-7
pii: 10.1186/s40662-021-00241-7
pmc: PMC8091662
doi:
Banques de données
ClinicalTrials.gov
['NCT04299399']
Types de publication
Journal Article
Langues
eng
Pagination
17Subventions
Organisme : National Natural Science Foundation of China
ID : 81670826
Organisme : Key-Area Research and Development Program of Guangdong Province
ID : No.2019B010152001
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