Their curved silhouettes would not look out of place in a high-end automobile showroom. The sleek titanium and alloy frames, some attached by spring hinges, are stamped with logos from brands such as Oliver Peoples, Giorgio Armani, and Cole Hahn. At Visions of Longmeadow, optical experts, who each possess at least 15 years of experience in the eyewear business, preside over the colorful range of glasses. Some members of the crew have nurtured their passion for eyesight at the shop, which has been in business since 1988, and others simply want help finding Waldo at the candy-cane factory. After customers have selected frames, they pair them with lenses ranging from basic single-vision lenses to high-index, scratch-resistant, antireflective, and transitional varieties.