Open AccessRole of anterior segment optical coherence tomography in the evaluation of microbial keratitis
Author(s) -
Isha Chaturvedi,
Kamaljeet Singh,
Jagriti Rana,
Kshama Dwivedi,
Reena Sachan
Publication year - 2021
Publication title -
indian journal of clinical and experimental opthalmology
Language(s) - English
Resource type - Journals
eISSN - 2395-1451
pISSN - 2395-1443
DOI - 10.18231/j.ijceo.2021.108
Subject(s) - optical coherence tomography , medicine , ophthalmology , calipers , keratitis , cornea , neuro ophthalmology , nuclear medicine , pediatric ophthalmology , mathematics , strabismus , geometry , glaucoma
Anterior segment optical coherence tomography (AS-OCT) is a newer technology that provides two-dimensional images of corneal infiltration. This study was undertaken to assess whether AS-OCT can aid objective evaluation and response to treatment in resolving microbial keratitis. This prospective study was performed on 17 patients of who underwent slit lamp and AS-OCT examination at presentation and follow up on days 3, 7, 14, 28 and 6 weeks. A standardized scanning protocol was used to measure the corneal thickness (CT) and infiltrate thickness (IT) using the caliper tool of a commercially available AS-OCT device. The mean CT in the infiltrated area and mean IT, both were thickest at presentation (710.88 um and 288.76 um respectively). The mean CT decreased to 665.12 µm, 650.24 µm, 584.35 µm, 549 µm, 507.47 µm on days 3, 7, 14, 28 and 6 weeks respectively. Similarly, the mean IT decreased to 287.24 µm, 244.41 µm, 197 µm, 174.59 µm and 154.82 µm. Paired t- test was used to calculate the statistical change in CT and IT, which was significant (p<0.0001) at 6 weeks, at the rate of 0.67% and 1.01% per day. AS-OCT can show morphological characteristics of microbial keratitis and give quantitative assessment at every follow up.