The American Optician

Summer 2017

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2 2 imatrix.com/OAAWinter16.html 877-721-3349 Schedule a free, one-on-one consultation with an iMatrix online marketing expert today! Bonus! Receive 40% off initial setup when you sign up for our website services! and enjoyable. In Franklin's time, all eyeglasses, whether for far or near, were made using the same style, shape and size frame. Always having to switch eyeglasses, as well as mistakenly wearing the far when he meant to wear the near and vice versa, must have been very frustrating. The experience led to many unsuccessful wearing nuances to alleviate the frustration. It was during this time that Franklin reconstructed his first version of the double spectacle for his own wear. In 1784, at the age of 78 and only six years before his death, Franklin worked with an optician to create the double spectacle using the lenses from both his far and near distance eyeglasses. Since most eyeglasses used the same exact frames, he was able to have both pairs of lenses split in half horizontally and reinserted into the frame, with the distance lens as the top and the near as the bottom. "ONE DOES NOT FAIL, THEY MADE THE WRONG CHOICE ONE HUNDRED TIMES." The top lens, regardless of its correction (in most cases it was for hyperopia), provided sharp acuity at 20 ft. and beyond (optical infinity). Without having to physically remove the far eyeglasses and replace them with the near, Franklin simply lowered his gaze to the lower lens to read at 16 in. There is no doubt that the ease of redirecting your gaze without any physical effort heightened visual performance, work productivity, physical health and personal enjoyment. Other bifocal designs followed , such as a circular segment named the Kryptok, the curve top, the flat top, the Ultex and a blended segment. Although each of these designs may have offered a less visible segment, Franklin's original design was still superior from two perspectives: 1) no segment offered as wide of a near field for reading, and 2) all of the other segment designs had a resultant prism effect called image jump. Learn more about image jump here . Franklin's original segment design is still available today and can be ordered as the Executive of Franklin bifocal.

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