Optical Coherence Tomography Angiography Evaluation of Retinal and Choroidal Microvascular Morphological Changes Following Strabismus Surgery.

PURPOSE: To evaluate the structural and microvascular changes in the retina and choroid after strabismus surgery. METHODS: The study included 44 eyes from 44 patients who underwent strabismus surgery between August 2020 and December 2021. Among these patients, 9 (20%) underwent horizontal one-muscle surgery, 27 (61%) underwent horizontal two-muscle surgery, and 8 (18%) underwent inferior oblique muscle anteriorization surgery. Optical coherence tomography angiography scans were conducted preoperatively and at 1 day, 1 week, 1 month, and 3 months postoperatively. RESULTS: The outer retinal blood flow showed a significant increase at 1 day postoperatively in horizontal two-muscle and inferior oblique muscle anteriorization surgery, whereas no significant difference was observed between periods in horizontal one-muscle surgery (P = .007). Choriocapillaris blood flow exhibited a significant increase at 1 day and 1 month postoperatively compared to the preoperative period (P < .001). Whole image superficial capillary plexus vascular density was significantly lower at 1 day postoperatively than preoperatively and 1 and 3 months postoperatively (P < .001). Whole image deep capillary plexus vascular density was significantly lower at 1 day than at 1 month postoperatively (P = .002). CONCLUSIONS: Following strabismus surgery, temporary changes in the hemodynamic microcirculation in the retina and choroid are observed. A transient decrease in retinal artery blood supply may be noticed, possibly attributed to the reduced anterior segment blood supply. [J Pediatr Ophthalmol Strabismus. 20XX;X(X):XX-XX.].

Multimodal Retinal Imaging Findings in Williams-Beuren Syndrome.

A 17-year-old male patient diagnosed with Williams-Beuren syndrome presented with a gradual decline in vision in both eyes during a 3-year period. The ophthalmologic examination was notable for numerous loop-shaped tortuous vessels accompanying normal appearing retinal vessels and cystoid macular edema (CME). Mild foveal hypoplasia with a persistence of inner retinal layers was noted on spectral-domain optical coherence tomography (OCT). OCT angiography showed that the abnormal vessels were not retinal vessels but were compatible with prepapillary vascular loops. The CME persisted despite repeated intravitreal bevacizumab treatment. The resolution was observed following an intravitreal triamcinolone acetonide injection. [Ophthalmic Surg Lasers Imaging Retina. 2019;50:514-518.].

Evaluation of subfoveal choroidal thickness in children with type 1 diabetes mellitus: an EDI-OCT study.

PURPOSE: To evaluate the subfoveal choroidal thickness (SFCT) measured by enhanced depth imaging optical coherence tomography (EDI-OCT) in children with type 1 diabetes without diabetic retinopathy. METHODS: In this prospective and comparative study, 41 diabetic children without diabetic retinopathy and 42 age-matched healthy subjects were enrolled. The SFCT was measured by EDI-OCT. Correlations between SFCT and diabetic parameters such as fasting glucose level, HbA1c, age, or duration of diabetes were also evaluated. RESULTS: The mean SFCT value was 375.3 ± 66.5 µm in the eyes with diabetes and 356.4 ± 52.0 µm in the control group. The SFCT was not correlated with fasting glucose level, HbA1c, age, or duration of diabetes. CONCLUSION: This study showed that SFCT of diabetic children are similar to those of healthy controls. In addition, SFCT are not affected by fasting glucose level, HbA1c, age, or duration of diabetes.