Realizing sufficient width and depth in the near-range field of view.

Wearers of these lenses wish to enjoy smooth sight-line transitions for their active middle-aged lifestyles despite the fact that they are used exclusively for near-range purposes. In this connection, TOKAI LARGO lenses have been designed to offer a wide near-range field of view and sufficient depth of field. Comfortable vision across a near-range field of view is offered to middle-aged users in business settings as well as for household tasks and avocations. Moreover, the use of a plastic material with a refractive index of 1.60 makes for thinner, lighter lenses. High standards for various attributes required in ophthalmic lenses—including a high degree of transparency and resistance to yellowing in addition to thinness and lightness—have been met with the design of these lenses.