The following is a summary of “Inferior rectus muscle detachment during strabismus surgery has a major effect on anterior segment perfusion, as shown by LSCI perfusion monitoring,” published in the December 2024 issue of Ophthalmology by Engqvist et al.
Anterior segment ischemia (ASI), a rare but serious complication of strabismus surgery resulting from damage to the anterior ciliary arteries supplying the eye, has been reported to occur more frequently when vertical rectus muscles are involved.
Researchers conducted a retrospective study to monitor anterior segment perfusion in real-time during inferior rectus muscle surgery.
They included 16 patients and 17 eyes from undergoing surgery on the inferior rectus muscle. Perfusion was assessed in the adjacent paralimbal and iris tissue, both before and after inferior rectus muscle detachment by laser speckle contrast imaging.
The results showed that the paralimbal vascular network was clearly visible in the perfusion images, while iris signals were weaker. Detachment of the inferior rectus muscle led to a median reduction in paralimbal perfusion by 33% (P <0.0001) and in iris perfusion by 11% (P =0.0174).
Investigators concluded the strabismus surgery involving the inferior rectus muscle significantly impacted anterior segment perfusion more than surgery on horizontal rectus muscles, where the decrease was only 23% and 5%.
Source: bjo.bmj.com/content/early/2024/12/11/bjo-2024-325916
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