MÉTODO PARA FORMAR UMA CAMADA SOBREMOLDADA BIFOCAL FOTOCROMICAMENTE ATIVADA EM UMA MÁQUINA DE MOLDAGEM POR INJENÇÃO DE LENTE ÓPTICA

摘要

A method and coating used to prepare a photochromically-enabled bifocal ophthalmic lens. The method and equipment includes injection molding a single vision lens, for example, from polycarbonate. The clamp opens vertically and the top insert is exchanged for a bifocal mold having a base curve similar to the single vision lens. The thermoset coating includes compounds from several acrylate classes, and is applied to the single vision lens. The coating may include a photochromic dye. The coating is also formulated to receive a photochromic solution through an imbibition process.