Short-term variation of central corneal thickness measurements in keratoconus using the Tono- Pachymeter NT530P (Tonopachy™)
Repeatability of values is a crucial reliability index in any instrument used to measure ocular parameters. The purpose of this study was to investigate short-term variability of central corneal thickness (CCT) measurements in keratoconic eyes. The Tono-Pachymeter NT530P (Tonopachy™) was used to tak...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
AOSIS
2012-12-01
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| Series: | African Vision and Eye Health |
| Subjects: | |
| Online Access: | https://avehjournal.org/index.php/aveh/article/view/77 |
| Summary: | Repeatability of values is a crucial reliability index in any instrument used to measure ocular parameters. The purpose of this study was to investigate short-term variability of central corneal thickness (CCT) measurements in keratoconic eyes. The Tono-Pachymeter NT530P (Tonopachy™) was used to take fifty successive automatic measurements of CCT of the right eyes of ten keratoconic subjects(six females and four males), aged 19 to 41 years (mean = 30.4 ± 6.8 years). The means, standard deviations and variances of the measurements showed little variation with good repeatability. Theinter-subject or overall mean values and standard deviations of the measurements were 452.1 ± 30.3 μm. The Kolmogorov-Smirnov (K-S), Lilliefors and Shapiro-Wilks (S-W) tests showed that gener-
ally the data was normally distributed, with a few exceptions. The results of this study suggest that over short periods of time, the Tonopachy™ provides repeatable measures of CCT in keratoconic
corneas. (S Afr Optom 2012 71(3) 102-108) |
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| ISSN: | 2413-3183 2410-1516 |