A number of years ago I began wearing contact lens in a mono-vision arrangement—one eye for short vision (reading, etc.), the other for distance. Years later lasik, then eventually cataract surgery continued the same arrangement. When I needed distance enhancement I began wearing a two–week (replace after two weeks) contact lens in that eye. After sensing my vision was a little blurry near the end of each two-week period I asked my eye doctor if anyone ever replaced the two-week lenses after one week; her response was “yes”, but other folks switched after 10 days. I was so focused on a week as the unit of measurement it never occurred to me to think half-way; 10 days, instead of 7 or 14! The value of seeking middle ground!
