Newly designed self-retaining contact lens for vitreous surgery.

Abstract

Development of a new self-retaining acrylic contact lens for vitreous surgery. A standard -60 diopters plano concave lens with the radius of curvature 6.7 mm (less than the cornea curvature) was modified with addition of four foot plates to facilitate stability and centration. A drop of viscoelastic material placed between lens and cornea induces negative suction and helps retain the lens in position. This specially designed lens eliminates the need for suturing on the sclera or dependence on the assistant to provide placement. It provides a stable well-centered view of the fundus during vitreous surgery.