The other day I visited downtown Philadelphia for the first time. It’s a great city, and you can’t beat it for history! There are the Liberty Bell, Independence Hall and many of the “firsts” and “oldest” for our country. Opticians remember Benjamin Franklin, one of Philadelphia’s founding fathers, as the inventor of bifocal spectacles. Of course, there’s Market Street with great food shops, and the “Rocky Steps,” the 72 steps leading to the Philadelphia Museum of Art, immortalized by Sylvester Stallone. (Don’t ask. Just looking at those steps gave me leg cramps!)
Parts 1 through 4 of this series described the importance of determining the visual axis measurement to maximize patient visual comfort and satisfaction with PALs. This final installment introduces methods and devices to obtain that measurement.