Research Journal of Medical Sciences
ISSN: Online 1993-6095ISSN: Print 1815-9346
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Ophthalmological Study of Repeatability and Reproducibility of CCT Measurement by Ultrasonic Pachymeter at a Tertiary Hospital
Sangeeta Vivek Patil, Pranesh Kulkarni, Abhishek Kulkarni and Afreen
Page: 409-413 | Received 20 Feb 2024, Published online: 16 Mar 2024
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Abstract
Assessment of central corneal thickness (CCT) has assumed considerable clinical importance in relation to the planning of corneal refractive surgery, management after refractive surgery, etc. Present study was aimed to study of repeatability and reproducibility of CCT measurement by the commercial available ultrasonic Pachymeter PACSCAN 300AP of Sonomed at a tertiary hospital. Present study was single‐center, prospective, observational study, conducted in cases of age group 40‐80 years, attending glaucoma clinic (irrespective of whether they have glaucoma or not). PACSCAN 300AP of Sonomed, an ultrasonic pachymeter is used for this study. 40 subjects underwent pachymetry in both of their eyes, thus a total of 80 eyes were included in the study. The mean CCT of observer A, observer B and observer C was 532.8μm, 528.3μm and 530.1μm respectively. There is no significant difference between the three mean CCT measurements (p=0.7). The mean measurement difference between observers was 2.91μm and the mean expected inter observer measurement was within ±1.00% and the largest observed value was <±1.1%. The ICC for reproducibility study was 0.979 (p<0.0001) suggesting that there is significant correlation between mean of the observer A, Observer B and Observer C. To assess agreement between the observers, Bland‐Altman plot was constructed, agreement are narrow with respect to the mean CCT, thus indicating excellent agreement. A variation of = 15 mm between two repeated measurements occurred in 145 out of 720 (20.14%) test‐retest Intra observer evaluations and in 668 out of2160 (30.93%) test‐retest inter observer evaluations. A variation of = 15 mm between two repeated measurements has been considered as a clinically relevant outcome, indicates that, despite the high reproducibility of the procedure.
How to cite this article:
Sangeeta Vivek Patil, Pranesh Kulkarni, Abhishek Kulkarni and Afreen . Ophthalmological Study of Repeatability and Reproducibility of CCT Measurement by Ultrasonic Pachymeter at a Tertiary Hospital.
DOI: https://doi.org/10.36478/10.36478/makrjms.2024.2.409.413
URL: https://www.makhillpublications.co/view-article/1815-9346/10.36478/makrjms.2024.2.409.413