Background: Keratoconus is a prevalent ectatic disorder marked
by progressive bilateral corneal thinning, resulting in a conical
corneal shape. This non-inflammatory thinning primarily occurs
in the infero-temporal region, serving as a key diagnostic feature
for keratoconus. This study aimed to compare the efficacy of
Anterior Segment Optical Coherence Tomography (AS-OCT) in
detection of subclinical keratoconus with the efficacy of
Pentacam. Methods: This was a comparative cross-sectional
study designed to compare the efficacy of AS-OCT in detection
of subclinical keratoconus with the efficacy of Pentacam. The
study included 30 eyes of patients aged between 18-40 years old
from both sexes, presenting with astigmatism more than -2.00
Diopters. The methodology involved a Corneal thickness
measurements were obtained using AS-OCT and Pentacam
Scheimpflug imaging. Data collection adhered to specific
inclusion and exclusion criteria. Results: Association between
pentacam diagnosis and other studied parameters showed a
significantly higher measurement of autorefraction cylinder, K1
and K2 readings keratoconus cases compared to free and suspect
groups. Another significantly higher distribution of positive slit
lamp findings in keratoconus group compared to suspect and free
groups. Association between Optical Coherence Tomography (OCT) diagnosis and the other
parameters studied showed a significantly higher measurements of autorefraction cylinder in
keratoconus and suspect cases compared to the free group. There was a significantly greater
prevalence of the "ask for Laser-Assisted in Situ Keratomileusis " complaint within the free
group as opposed to the suspect and keratoconus groups. OCT results compared to pentacam
results as true positive, false positive, true negative and false negative. Conclusion: AS-OCT
provides reliable pachymetric maps and Pentacam demonstrates elevation and curvature
maps giving it the upper hand in detecting subclinical keratoconus. AS-OCT can be used in
the screening of highly astigmatic corneas for detecting early keratoconus. |
