The effect of strabismus surgery on retrobulbar hemodynamics

Ünsal, Alparslan; Özkan, Seyhan B.; Karaman, Can Zafer

doi:10.1016/j.jaapos.2006.12.059

Cited by 15 publications

(11 citation statements)

References 25 publications

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“…In addition, an acute visual acuity loss following the use of intravitreal bevacizumab for diabetic macular edema has been reported. 20 Various procedures such as strabismus surgery, hemodialysis, topical anti-glaucomatous 21 In 1 study, it was stated that a single hemodialysis session decreases blood flow in all the retrobulbar blood vessels but vascular resistance remains unchanged. 22 In another study, it was found that topical anti-glaucomatous Travoprost and Latanoprost significantly reduced the RI in the CRA and OA, respectively, and topical Bimatoprost had no effect on ocular hemodynamics.…”

Section: Discussionmentioning

confidence: 99%

Effects of intravitreal bevacizumab (Avastin®) therapy on retrobulbar blood flow parameters in patients with neovascular age‐related macular degeneration

Saygılı

Mete

Metin

et al. 2009

J of Clinical Ultrasound

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Section: Discussionmentioning

confidence: 99%

Effects of intravitreal bevacizumab (Avastin®) therapy on retrobulbar blood flow parameters in patients with neovascular age‐related macular degeneration

Saygılı

Mete

Metin

et al. 2009

J of Clinical Ultrasound

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“…Previous studies investigating retrobulbar hemodynamics after strabismus surgery included patients with a wide range of age [ 5 , 6 , 13 ]. In this study, we included only individuals aged 5 to 15 years to evaluate the alterations in retrobulber hemodynamics in patients not at risk of ASI.…”

Section: Discussionmentioning

confidence: 99%

“…Since then, CDI has been increasingly used to evaluate the changes in retrobulbar circulation and ocular perfusion [ 5 ]. Although the blood flow parameters of the anterior and long posterior ciliary arteries cannot be evaluated directly via CDI, alterations in retrobulbar circulation following strabismus surgery may reflect the changes in anterior segment circulation [ 6 ]. Since posterior ciliary artery also provides blood supply to the choroid in addition to the anterior segment, a change in the choroidal thickness (CT) may also be expected after strabismus surgery.…”

Section: Introductionmentioning

confidence: 99%

Investigation of alterations in retrobulbar hemodynamics and their correlation with choroidal thickness after strabismus surgery

Uzun,

Altas,

Sahin

2024

BMC Ophthalmol

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Background To evaluate the changes in retrobulbar circulation after strabismus surgery and to assess the relationship of these changes with choroidal thickness (CT). Methods This prospective study included 26 eyes of 26 patients who underwent strabismus surgery and 15 eyes of 15 healthy individuals as control group. The patients who had single horizontal muscle surgery were included in Group 1 (n = 14); and those who had surgery on both horizontal muscles were included in Group 2 (n = 12). Peak systolic velocity (PSV), end-diastolic velocity (EDV), resistive index (RI) and pulsatility index (PI) of ophthalmic artery (OA), posterior ciliary artery (PCA), and central retinal artery (CRA) were measured using Color Doppler Ultrasonography. Subfoveal CT was measured via Optical Coherence Tomography. All measurements were obtained preoperatively, at 1st week and 1st month after surgery. Results There were no differences regarding preoperative blood flow velocity parameters among the groups. OA RI increased significantly at 1st week and 1st month after surgery in Group 1 and 2 (P = 0.029 and P = 0.045, respectively). There was a significant increase in PCA PSV at 1st week in Group 1 (P = 0.002). There was no difference between the mean preoperative and postoperative CT among the 3 groups. A negative correlation between the percentage changes of CT and CRA EDV was found in Group 2 (P = 0.011). Conclusion Single and double horizontal rectus muscle surgery have a measurable effect on retrobulbar hemodynamics but these changes do not correlate with CT.

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“…5 In contrast, Unsal et al observed no significant variations in the Doppler indices of the ophthalmic, posterior ciliary, and central retinal artery. 3 The differences in the study outcomes may be related to differences in study protocols, surgical techniques, and interpretation of Doppler ultrasound images.…”

Section: Discussionmentioning

confidence: 99%

“…The majority of the work was based on Doppler ultrasonography imaging and has offered contradictory findings. 3–6 It is still unclear whether strabismus surgery has a significant effect or not on ocular blood flow.…”

Section: Introductionmentioning

confidence: 99%

Retinal and choroidal microvasculature is altered after strabismus surgery

Hüseyinhan

Özçalışkan

Gürez

et al. 2022

European Journal of Ophthalmology

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Purpose To evaluate the retinal and choroidal microvasculature after strabismus surgery using swept-source optical coherence tomography angiography (OCTA) Methods Thirty-three eyes of 33 patients who underwent horizontal rectus surgery for strabismus were included in this retrospective study. The unoperated fellow eyes were used as the control group. The macular microvasculature was assessed using a 3 × 3 scan pattern centred on the fovea preoperatively, and one week and one month postoperatively. The vessel density (VD) of superficial capillary plexus (SCP), deep capillary plexus (DCP), and choriocapillaris (CC) were automatically analyzed. The foveal avascular zone (FAZ) was calculated manually using the tool of the device. Results The VD in SCP demonstrated a significant difference between operated and fellow eyes at one week (p = 0.017). Moreover, a significant increase was observed in the mean VD values in SCP of operated eyes after surgery (p = 0.037). The VD in DCP exhibited no significant differences between operated and fellow eyes before and after strabismus surgery. However, there was a significant difference in VD was observed between operated and fellow eyes one week after surgery (p = 0.001). The mean VD in CC was significantly increased in the operated eyes one week after surgery compared to preoperative values (p = 0.006). Conclusion This study revealed that strabismus surgery may cause transient alterations both in retinal and choroidal microcirculation in the early postoperative period.

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The effect of strabismus surgery on retrobulbar hemodynamics

Cited by 15 publications

References 25 publications

Effects of intravitreal bevacizumab (Avastin®) therapy on retrobulbar blood flow parameters in patients with neovascular age‐related macular degeneration

Effects of intravitreal bevacizumab (Avastin®) therapy on retrobulbar blood flow parameters in patients with neovascular age‐related macular degeneration

Investigation of alterations in retrobulbar hemodynamics and their correlation with choroidal thickness after strabismus surgery

Retinal and choroidal microvasculature is altered after strabismus surgery

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