Lens capsular often changes after pediatric cataract surgery，causing complications such as anterior capsulerhexis shrinkage, visual axis opacification (VAO), zonular dehiscence and so on. The aim of study was to prospectively investigate the capsular outcomes of pediatric cataract surgery with primary intraocular lens (IOL) implantation.

To investigate the capsular outcomes from a case series of children who underwent cataract surgery and primary IOL implantation at the Eye Hospital of Wenzhou Medical University between 2016 and 2019. Took Digital retro-illumination photographs of pediatric eyes at baseline and 6 months, 12 months, and the last visit postoperatively. Compare the capsular outcomes of the posterior capsule opening (PCO) area and visual axis transparent area at those time points, and analysis the correlations between the PCO area and influential factors, such as age at surgery, axial growth, and follow-up duration.

Inclusion Criteria:

Children (age 0.5~8 years) who underwent cataract surgery, posterior capsulorhexis or capsulotomy and anterior vitrectomyand primary IOL implantation at the Eye Hospital of Wenzhou Medical University (Hangzhou, China). The follow-up period was at least 1 year.

Exclusion Criteria:

Patients with ocular trauma, corneal disorders, glaucoma, preoperative lens luxation or subluxation, membranous cataract, persistent hyperplastic primary vitreous, surgical or postoperative complications such as glaucoma or suspect-glaucoma and synechia, pupils that could not be sufficiently dilated, and those who could not complete follow-ups or did not have clear digital photographs.

Patients （age：0.5~8.0 years）with congenital cataract