B scan cinescan

The following were performed before the OCT scanning: (1) evaluation of refractive error without pupil dilation by optometry (AR-310A, NIDEK, Japan); (2) axial length measurement by IOLMaster (Carl Zeiss Meditec AG, Germany); (3) intraocular pressure measurement by noncontact tonometer (TX-20, Canon, Japan); (4) color fundus photography (retinal camera CR-DGi, Canon, Japan); (5) ultrasonography of the eye ball to exclude posterior staphyloma (B-scan CineScan, Quantel Medical, France); and (6) careful examination of the peripheral retina by a senior retinal specialist (Fenghua Wang) using an indirect ophthalmoscope to exclude peripheral degeneration, retinal tear, or retinal detachment.

All patients underwent a complete ophthalmic examination including refraction and best-corrected visual acuity (BCVA) measurement, slit-lamp examination, indirect ophthalmoscopy, and spectral domain optical coherence tomography (OCT) (SPECTRALIS HRA OCT; Heidelberg Engineering, Heidelberg, Germany) before surgery and at 1 week and 1, 3, and 6 months after surgery. B-Scan ultrasonography (B-Scan-Cinescan, Quantel Medical, France) and IOLMaster (Carl Zeiss Meditec AG, Jena, Germany) measurements were also performed before surgery. The BCVA was recorded in decimal acuity and converted to the logarithm of the minimal angle of resolution (log MAR) for statistical analysis. If the BCVA was counting fingers or hand movements, it was assigned as the equivalent Snellen acuity of 20/2000 or 20/20000, respectively, based on a previous publication [12 (link)].