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Quantitative measurement of retinal vascular diameter changes in the early postoperative period after strabismus
Jinqiong Zhou1, Jing Fu1, Jipeng Li1
1Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University; Beijing Ophthalmology & Visual Sciences Key Laboratory, Beijing, China.
Purpose:
To investigate quantitatively the retinal vascular diameter changes before and after strabismus surgery, analyzing the potential hemodynamic changes that may occur in the retinal circulation.
Methods:
Consecutive patients with horizontal strabismus who underwent strabismus surgery were prospectively enrolled. Color fundus photographs were taken of each eye before and 1 day after surgery. The retinal vessel diameters were measured using computer-assisted quantitative assessment software. Paired-sample t test was used to evaluate the central retinal arteriolar equivalent (CRAE), central retinal venular equivalent (CRVE), and arteriovenous ratio (AVR) before and 1 day after surgery. We also analyzed those changes in different subgroups according to surgical protocols.
Results:
A total of 217 eyes of 148 patients were included. Compared with the data before surgery, the mean CRAE significantly increased 1 day after surgery (P = 0.01), so did the AVR (P = 0.003). There was no significant difference with respect to CRVE (P = 0.43). The CRAE and AVR were not significantly different in the lateral rectus recession group.
Conclusions:
Strabismus surgery on horizontal rectus muscles may change retinal hemodynamics by increasing the central retinal arteriolar diameter during the early postoperative period.
