1.56 Round Top Bifocal Photochromic Transition Lens

Features of Round Top Bifocal LensAs the name suggests, the round top bifocals have a round small portion at the bottom of the lens. A flat top bifocal lens has a clear horizontal dividing line between the distance vision zone and near vision zone. While, the dividing line of a round top bifocal lens is more blurred and the transition is more natural. However, this also reduces the width of near vision available at the top of the segment. The wearer must shift their line of sight further down the lens to obtain the same width. The reading segment is most commonly available in 28mm. Therefore, round segment bifocals are not as popular as flat-top bifocals.

Types of Bifocal LensesThe working principle of bifocal lenses is the same. A small portion at the bottom of the lens contains the power correction needed for myopia. The rest of the lens is usually used to correct hyperopia. According to different shapes of the small portion, bifocal lenses can be divided into flat top bifocal lenses, round top bifocal lenses and blended (or Invisible) bifocal lenses.

With these photochromic bifocal glasses, you no longer need to switch between sunglasses and regular eyeglasses throughout your workday. The lenses automatically adjust their tint based on the environment. Suitable for both indoor and outdoor use. The lower part of the multifunctional lens is magnified for reading, ideal for activities like reading books or scrolling through TikTok, while the upper part is a clear lens, allowing you to easily see distant objects without taking off your glasses. Whether you're watching a game on a sunny afternoon, studying for an exam or chatting with friends, these multifunctional glasses will meet your needs!