Comparing the horizontal recti insertions on anterior segment optical coherence tomography versus intraoperative measurements in squint surgery
Sowmya Raveendra Murthy, Prerana TripathiAim:
We evaluated and compared the horizontal recti insertions on anterior segment optical coherence tomography (AS-OCT) versus intraoperative measurements during extraocular surgery.
Materials and Methods:
A prospective study was conducted in 28 patients in the age group of 5–50 years. The distance of horizontal recti muscle insertion (both medial rectus [MR] and lateral rectus [LR]) from the limbus and the angle of the anterior chamber measured preoperatively by AS-OCT were compared to intraoperative measurement using a surgical caliper and ruler (arc and chord length) before disinsertion (BD) and after disinsertion (AD) of recti, respectively (BD and AD).
Results:
The mean age of subjects was 26.34 years. A total of 21 MR and 26 LR were measured. The mean distance of MR insertion was 5.79–5.88 (BD and AD), and LR was 7.11-7.12 mm. On AS-OCT, MR measured 6.2 mm from limbus and 5.73 mm from anterior chamber angle (AC angle) and that of LR was 6.37 and 5.79 mm, respectively. The values correlated on the Pearson’s correlation coefficient and were noted to have
Conclusions:
AS-OCT measured insertions correlated well with intraoperative measurements BD and AD, albeit in virgin muscles.