Refractive error and ocular alignment in school-aged children from low-income areas of São Paulo, Brazil.

Background: Uncorrected refractive errors and amblyopia are reported as the two main causes of childhood visual impairment and blindness worldwide. Our purpose was to evaluate refractive status, ocular alignment and effective refractive error coverage (eREC) of school-aged children from low-income areas of Sao Paulo city, Brazil.

Methods: Data from the "Ver na Escola" Project were used for the current study.

Femtosecond assisted intrastromal corneal ring (ISCR) implantation for the treatment of corneal ectasia.

Purpose: To assess the outcomes of intrastromal corneal ring (ISCR) implantation for the treatment of corneal ectasia.

Methods: Thirty-five consecutive patients with secondary corneal ectasia treated with keraring intrastromal corneal ring segment implantation aided by intralaser femtosecond technique (K-ICRS-FS) were evaluated. Visual acuity (logMAR), refraction and astigmatism vector analysis were measured preoperatively and 3 months postoperatively using vector analysis as described by some authors.

[Late opacification of a polymethylmethacrylate (PMMA) intraocular lens: case report].

The use of intraocular lenses was a great advance in visual recovery after cataract surgery. Although usually with good biocompatibility, some alterations in the intraocular lens material may occur after implantation. Polymethylmethacrylate was the first intraocular lens material to be used on a large scale and assumed to be inert and well-tolerated.