What Are Multifocal Eyeglass Lenses? If you're in your mid-40s or older, you probably have glasses with multifocal lenses, like bifocals or trifocals. These have two or more prescriptions to correct your vision. In the past, you could spot this type of lens by the line between the two s...
There are all kinds of eyeglass lenses, including light-sensitive photochromic ones that darken in sunlight and double-up as sunglasses. You'll also find lenses in binoculars (which use two or three lenses in each of the cylinders serving your eyes) and telescopes, though not all microscopes ...
There are many different types of telescopes available for those interested in exploring the night sky. Telescopes come in a variety of designs, some of which have been around since the 1600s. The first type of telescope ever designed was a refractor, designed by an eyeglass maker in the ...
For coverage for vision exams, eyeglass frames and corrective lenses, contact lenses, and other eye-related care, you’ll need to consider adding avisionplan. Keep in mind that a vision plan can be more critical as you or your family member’s age, even if you’ve never needed vision ...