Advantages: 1. Reduce the glare of oncoming light with the coating results in much clearer vision. 2. Reduce nighttime distortions. 3. Have the benefit of being cosmetically more appealing, with less glare appearing off the lenses. 4.The coating helps anyone's eyes appear more natural and the lenses to look thinner. 5. Relief from fluorescent lighting and computer screen glare.
Disadvantages: 1. Add high cost to a pair of glasses, but not covered by many insurance companies. 2.Some consumers do not feel the additional cost is worth the benefits gained. (The effect is not noticeable)
Source:http://www.ehow.com/info_12121281_advantages-disadvantages-antiglare-coating-eyeglasses.html