Anti-reflex layer lifetime made in Bogotá by three optic laboratories

Abstract

Technological advances in the anti-reflex layer implementing hydrophobic coatings extend the layer life and reduce the trend to get stains, improving thus its adherence and anti-scratch resistance. Although currently most of anti-reflex coatings are not designed to last as long as the lens, they do offer guarantees against some visual nuisances. <em><strong>Objective:</strong></em> to determine the antiglare layer lifetime produced by three Colombian laboratories. Materials and <em><strong>Methods:</strong></em> a descriptive study was carried out in Bogotá, in three laboratories that produce the coating. Five lenses from each laboratory made of CR-39 (allyl diglycol carbonate) were subjected to boiling test with 5% of sodium chloride (NaCl) and abrasion test in the Lens Coat® Lab. <em><strong>Results:</strong></em> the boiling test with 5% of sodium chloride and abrasion test clearly show that Laboratory B, compared to the other tested labs, produces the anti-reflex coating with the longest lifetime, a year and three months approximately.