Typically applied on both sides of an eyeglass lens, this coating, also known as AR or anti-glare, “reduces the amount of light reflected off the surfaces of spectacle lenses, and may enhance the contrast of certain scenes,” says Scott E. Brodie, MD, PhD, professor of ophthalmology at NYU Langone Health in New York City. This implies that you receive optimal light from your surroundings while avoiding any visual disruptions caused by light bouncing off the lenses. (The term “anti-glare” is a misnomer, however, says Brodie, and glare—think oncoming headlights—is better addressed with polarized lenses than with AR.)
Who might consider: While beneficial for most individuals, anti-reflective (AR) coating proves particularly advantageous for frequent nighttime drivers, as it diminishes glare from headlights, and for those who spend extensive hours reading on computer screens. Its efficacy is notably pronounced when applied to polycarbonate or high-index lenses, which tend to reflect more light compared to standard plastic CR-39 or glass lenses. Hence, it is highly recommended for optimal visual clarity and comfort in these scenarios.
What to know: Anti-reflective (AR) coatings may have garnered a negative reputation among consumers who recall its earlier susceptibility to degradation and the formation of cracks, often termed 'crazing' or 'spiderwebbing.' Fortunately, significant strides were made in addressing these issues by the early 2000s, leading to marked improvements in durability and resilience.
Historically, AR coatings were prone to accumulating dust and grime. However, contemporary formulations commonly feature integrated anti-static treatments, which not only deter the adherence of water and oil but also facilitate easier maintenance, keeping the coating cleaner for longer periods. As a result, the majority of AR coatings available today are designed to deliver exceptional performance and reliability.