There are many options to be considered when purchasing eyeglasses. These options give you a little extra vision protection, and improved lens performance. For the most comfortable, durable and best-looking glasses, the following lens treatments should be considered essential:
Scratch-resistant coat (hard coating)
All lens materials are prone to scratches and abrasions. Nothing will make your lenses scratch-proof, but a scratch-resistant coating can help prevent scratches from damaging your lenses and interfering with your vision. Scratch-resistant lenses can minimize every day wear and tear and help you protect your investment in quality lenses.
Ultraviolet (UV) coat
Overexposing your eyes to ultraviolet rays can cause serious eye problems such as cataracts (clouding of the eye lens) and macular degeneration (breakdown of macula). The combination of UV protection that's built into lenses and applied as a coating can block 98-100% of transmitted and reflected UVA and UVB rays.
Anti-reflective coating can reduce eyestrain caused from glare, reflections, and the "halos" you see around lights at night. It produces a hard coating to avoid scratches and helps repel dust and water. This coating makes your vision sharper and your eyes appear clearer behind your lenses. Anti-reflective coatings reduce the amount of reflected UV from the front and back of your lenses, providing more comfortable vision.
Blue-light protective coat
Similar to the standard anti-reflective coating, blue-light coating optimizes visual performance, improves visual comfort, enhances your appearance, and extends the life of your lenses. The difference being that blue-light coating combats digital eye strain by reducing your exposure to blue light from smartphones, tablets, computer screens, televisions, energy-efficient lighting, and the sun.
Also referred to as Transitions lenses, photochromic lenses automatically darken when exposed to UV light from the sun, eliminating the need for separate sunglasses in many cases. The glass in windows block UV light therefore transition lenses stay clear inside buildings near windows and in vehicles. They are designed to reduce eye fatigue and strain by adjusting to the light around you. They are available in all lens designs and materials, including bifocals and high-index lenses.
Polarized lenses reduce glare reflected off surfaces, making images appear sharper and clearer. They are available for non-prescription and prescription sunglasses, and can be worn indoors by light-sensitive people, including post-cataract surgery patients and those continually exposed to bright sunlight through windows. Most polarized lenses provide UV protection, which is important to maintaining healthy eye sight.