Myopia and Hypermetropia are the most common issues associated with eyes, but Presbyopia is a gradual inability to focus on small objects and needs instant consideration. The emergence of Bifocal Sunglasses has satisfied people over the past years due to its vision protection under sunlight. And how they can help you have a comfortable vision in all situations. The bottom portion is works by magnifying to help you see the smaller prints. Sport Bifocal Sunglasses: Those days are gone when bifocal glasses were only available in square and round shapes. If you play tennis, golf, or run, or go cycling, you can wear Sport Bifocal Sunglasses, specially designed for sports.