The Digital Wide-Field provides the highest resolution pan retinal examination at the slit lamp. Enhanced imaging, and the widest field of any non-contact lens, it is the ultimate 90d lens and more. Obtain the widest field of view in the slit lamp lens range, referred to as the 3rd generation 90d. The Digital Wide Field allows crystal clear views spanning from the central retina to the peripheral retina, even through undilated pupils. This lens provides 40% more field of view while maintaining the same magnification that you are used to with the classic 90d. The superior optical coating and high index glass ensure bright, distortion free imaging. The Digital Wide-field slit lamp lens is available throughout the year in 7 standard colors. Volk Optical warrants its Non-contact Slit Lamp and BIO Lenses against defects in materials or workmanship for a period of 10 years from receipt by end user. This warranty is valid only on lenses purchased directly from Volk Optical Amazon store, Volk.com, or an authorized Volk distributor.