Abstract
Purpose :
To report a novel approach for sagittal image analysis of the upper eyelid using anterior segment optical coherence tomography (AS-OCT).
Methods :
Sagittal image of central upper eyelid was obtained by AS-OCT (CASIA2, Tomey, Japan). The following parameters were determined: upper eyelid thickness (UET), the distance between two parallel lines tangential to the apexes of the cornea and the upper eyelid; the upper eyelid angle (UEA), the angle formed by a line running tangential to the apex of the cornea and a line passing from the apex of the cornea to the apex of the upper eyelid; the cross-sectional area (CSA), the area from the edge of the eyelid to a point 6 mm above. The first setting included 10 subjects each in a young (20~40 yrs.) and an old (60~80 yrs.) group to study age-related changes. The second setting included 20 blepharoptosis patients who underwent levator resection. Postsurgical changes were analyzed.
Results :
The UET was 2.04 ± 0.37 mm and 2.72 ± 0.46 mm in the young and old group, respectively. The difference between the two groups was significant (P=0.016, student t test). The old group also had a significantly larger UEA and CSA than those of young group (P=0.032 and P=0.021, respectively). The UET, UEA and CSA decreased significantly after blepharoptosis surgery (all P<0.01). Changes of UEA and CSA positively correlated with MRD1 changes.
Conclusions :
AS-OCT can be used as a non-invasive and quantitative tool of evaluating sagittal images of the upper eyelid.
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.