Comparison of optical quality after implantable collamer lens implantation and wavefront-guided laser keratomileusis.

Aim: To compare the optical quality after implantation of implantable collamer lens (ICL) and wavefront-guided laser keratomileusis (WG-LASIK).

Methods: The study included 40 eyes of 22 patients with myopia who accepted ICL implantation and 40 eyes of 20 patients with myopia who received WG-LASIK. Before surgery and three months after surgery, the objective scattering index (OSI), the values of modulation transfer function (MTF) cutoff frequency, Strehl ratio, and the Optical Quality Analysis System (OQAS) values (OVs) were accessed.

Prevalence of high astigmatism in children aged 3 to 6 years in Guangxi, China.

Purpose: To investigate the prevalence and type of high astigmatism among children aged 3 to 6 years in Guangxi, a relatively undeveloped province in western China, and to examine the correlation between astigmatism and visual acuity.

Methods: Children aged 3 to 6 years in Nanning, the capital of Guangxi Province, participated in a population-based survey using a cluster random sampling technique. Eye examinations included autorefraction, visual acuity measurements, and assessments of the external eye, anterior segment, media, and fundus.