The swift audubon roof prism models are 8.5x44mm and have 19mm of eye relief. They are fully waterproof and dustproof with excellent optics and are only $349.99 at binoculars .com. The longest eye relief I can think of is the Zeiss DF 7x40 NVA east german millitary binocs. They have 23MM!!! Anyway I wear glasses and my optolyth Alpins do pretty well. Look for min of 17mm. 19 or 20 is better. Twist down or roll down eyecaps help
okcmco