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The inter-eye difference in corneal sensitivity in patients with infectious ulcers as measured with the Cochet-Bonnet esthesiometer
, 23, 2
Affiliations- Lady Willington Hospital, Manali, Himachal Pradesh, India
- Department of Ophthalmology, Christian Medical College, Vellore, India
- Shoba Optics, Trissur, Kerala, India
open access
Abstract
Background: The purpose of this study was to quantify the inter-eye difference in corneal sensations in patients with infectious corneal ulcers using the Cochet-Bonnet esthesiometer (CBE).
Material and methods: Patients with unilateral corneal ulcers of at least 1.5 mm of the clear cornea in all quadrants meeting the study criteria were identified and enrolled. The clinical features with their etiologies were noted. The corneal sensations were measured with CBE in all four quadrants. Patients were further sub-categorized based on the surface area and the “time to heal” of the ulcers for further correlation and analysis.
Results: This was a cross-sectional study conducted at a tertiary care center. The study included 35 patients, with the majority (30 patients, 85.7%) diagnosed with fungal etiology. The average corneal sensations in the ulcer and the normal eyes were 52.29 mm and 57.36 mm, respectively. The inter-eye differences were 3.93 mm (p = 0.06) and 6.55 mm (p = 0.04) among patients with an average surface area of ≤ 10 mm2 and > 10 mm2, respectively. Patients who took up to 30 days and > 30 days to heal had inter-eye differences in a sensation of 0.71 mm (p = 0.04) and 6.14 mm (p = 0.05), respectively.
Conclusions: The mean corneal sensations in all quadrants were less significant in the infectious ulcer eyes than normal eyes. Infectious ulcers with a surface area of > 10 mm2 had greater inter-eye differences in their corneal sensitivities. Patients who took a longer "time to heal" of > 30 days showed a significant and greater inter-eye difference in their corneal sensitivities.
Abstract
Background: The purpose of this study was to quantify the inter-eye difference in corneal sensations in patients with infectious corneal ulcers using the Cochet-Bonnet esthesiometer (CBE).
Material and methods: Patients with unilateral corneal ulcers of at least 1.5 mm of the clear cornea in all quadrants meeting the study criteria were identified and enrolled. The clinical features with their etiologies were noted. The corneal sensations were measured with CBE in all four quadrants. Patients were further sub-categorized based on the surface area and the “time to heal” of the ulcers for further correlation and analysis.
Results: This was a cross-sectional study conducted at a tertiary care center. The study included 35 patients, with the majority (30 patients, 85.7%) diagnosed with fungal etiology. The average corneal sensations in the ulcer and the normal eyes were 52.29 mm and 57.36 mm, respectively. The inter-eye differences were 3.93 mm (p = 0.06) and 6.55 mm (p = 0.04) among patients with an average surface area of ≤ 10 mm2 and > 10 mm2, respectively. Patients who took up to 30 days and > 30 days to heal had inter-eye differences in a sensation of 0.71 mm (p = 0.04) and 6.14 mm (p = 0.05), respectively.
Conclusions: The mean corneal sensations in all quadrants were less significant in the infectious ulcer eyes than normal eyes. Infectious ulcers with a surface area of > 10 mm2 had greater inter-eye differences in their corneal sensitivities. Patients who took a longer "time to heal" of > 30 days showed a significant and greater inter-eye difference in their corneal sensitivities.
Keywords
Cochet-Bonnet; corneal sensation; esthesiometer; infectious; ulcer
About this articleTitle
The inter-eye difference in corneal sensitivity in patients with infectious ulcers as measured with the Cochet-Bonnet esthesiometer
Journal
Issue
Vol 6 (2021): Continuous Publishing
Article type
Original paper
Pages
31-37
Published online
2021-02-24
Page views
6232
Article views/downloads
472
DOI
Bibliographic record
Ophthalmol J 2021;6:31-37.
Keywords
Cochet-Bonnet
corneal sensation
esthesiometer
infectious
ulcer
Authors
Ancy Chakko
Bilto Babu
Satheesh Solomon T Selvin
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